Preliminary Technical Proposal For Modular Water Treatment 20240412.md 45 KB
Newater House® For High-Quality Drinking Water Treatment。。Preliminary Technical Proposal。。BLUENEXUS TECHNOLOGIES PTE. LTD。。GreenTech Environmental Co., Ltd.。。April 2024。。Table of Contents。。1 Advantages and Highlights of Newater House® 3。。1.1 Overview of Newater House® 3。。1.2 Advantages and Features of Newater House® 3。。1.3 The integrated patented technology of Newater House® 5。。1.3.1 Membrane Universal Platform Technology 5。。1.3.2 Membrane Fouling Prevention Technology 5。。1.3.3 Precise Dosing Technology 6。。1.3.4 Water Plant Twin® Unmanned Control Technology 8。。2 Project Overview 13。。2.1 Engineering Overview 13。。2.2 Design Standards and Specifications 13。。2.3 Scope of work 13。。2.4 Designed Influent and Effluent Quality 16。。2.4.1 Designed Influent Quality 16。。2.4.2 Designed Effluent Quality 17。。3 Process Flow Balance 19。。4 Pretreatment Process Design 20。。4.1 Introduction 20。。4.2 High-efficiency clarification tank 20。。4.3 Multi-Media Filters 21。。5 Newater House® Process Design 22。。5.1 Main Functional Units of Newater House® 22。。5.1.1 Ultrafiltration Process Unit 23。。5.1.2 Reverse Osmosis Process Unit 24。。5.2 Configuration List 27。。6 Overall System Design Parameters 28。。7 OPEX Evaluation 30。。7.1 Power Consumption 30。。7.2 Chemical Consumption 30。。7.3 Membrane depreciation 30。。Advantages and Highlights of Newater House®。。Overview of Newater House®。。Newater House®" completely subverts the traditional water plant construction model by implementing an engineering productization mindset. It applies the intelligent software developed by GreenTech Environment based on AI algorithms to integrate all the equipment, facilities, and structures of the entire plant into a compact and intelligent unit.。。Based on more than 20 years of experience and data accumulation from over 300 projects in the field of advanced water treatment and wastewater resource utilization, GreenTech Environmental has solidified its know-how in water plant design, equipment manufacturing, engineering construction, and operation management into the Newater House® products.。。The Newater House® realizes unmanned and efficient operation, providing high-quality water for industrial enterprises, industrial parks, urban and rural municipalities solving problems such as water shortage, insufficient environmental capacity, water security, and high costs.。。Newater House® Rendering。。Advantages and Features of Newater House®。。Prefabricated production, short construction time。。GreenTech Environmental's Newater House® adopts a product-oriented and assembly-line production approach. Both hardware and software are designed according to modular standards, prefabricated in the factory. The modules are assembled on-site, greatly reducing the need of civil engineering and shortening the design and construction cycle.。。Intelligent production, unmanned operation。。The digital operation and management platform of the Newater House® is designed using BIM technologies. With a “digital water plant twin” in hand, our end user would receive an operating platform with a 3D visual correlating exactly to the physical water plant. Featuring highly automated control, the digital platform supports automatic virtual inspection and remote operation, reducing manpower or even achieving unmanned operation. This reduces significantly reduces production and operation costs.。。Highly integrated, minimal land-use。。Product integration is the most critical factor in the product innovation of Newater House®. When a product becomes highly integrated, many application scenarios are unlocked. Through unmanned operation, Newater House® greatly reduces the need of human in the maintenance and management of various water treatment processes, while effectively saving facilities such as office buildings and control room. Ultimately, Newater House® is able to occupy only 1/6 of the land area comparing to a traditional water plants.。。High mobile。。Mobility is crucial for productization, reducing the financial risk for investors. Because of the modular nature of Newater House®, the end user has the ability to move it when there’s no longer a need for water. Instead, it can be relocated to a different location to produce the same quality of water elsewhere.。。Low overall cost。。Highly integrated design of the Newater House greatly reduces both CAPEX and OPEX. As an example, the need for land is greatly lowered, thus reducing the capital cost of land. At the same time, the unmanned intelligent operation management platform can effectively reduce the personnel management costs of Newater House®. Therefore, Newater House®achieves low overall lifecycle costs.。。The integrated patented technology of Newater House®。。Membrane Universal Platform Technology。。Newater House® adopts GreenTech’s independently developed, global patented Membrane Universal Platform equipment technology, achieving universal interchangeability of membranes from different brands. and achieving software compatibility with different operating system conditions. This technology helps GreenTech to realize functional interchangeability, providing end customers with the autonomy to freely choose membrane brands throughout the entire lifecycle of the water treatment plant.。。GreenTech Environmental’s Membrane Universal Platform。。The project plans to use GreenTech’s Membrane Universal Platform which has universal compatibility for membranes from various suppliers. The equipment selection for process configuration, electrical automation, logic control, and program design fully considers the compatibility of two or more mainstream membrane brands, achieving the interchangeability of multiple membrane brands.。。The Membrane Universal Platform equipment technology achieves universal interchangeability of membrane elements from various manufacturers in the industry. Each module also has a large treatment capacity, reducing the construction and operation costs of water plants. The platform is digitally constructed and operated.。。In addition to the technical services requested by the client, GreenTech will also provide construction and operation services of a digital water plant twin platform, benefiting the end-user throughout the entire lifecycle of the water plant, both online and offline.。。For this project, we plan to use GreenTech’s digital construction and operation management platform.。。Membrane Fouling Prevention Technology。。Membrane fouling prevention technology is a standard configuration for our membrane-based projects. Existing engineering practices have fully demonstrated that this device can effectively control membrane fouling and significantly reduce the cleaning cycle of the system, thereby ensuring the long-term and stable operation of the membrane system.。。The biggest problem of membrane technology in water treatment applications is membrane fouling and damage, which is mainly caused by colloids, organic pollutants, biofilms, and other substances in the water during the filtration process. Currently, the industry's common methods to address fouling are water washing, air washing, and chemical cleaning. Air washing often brings the risk of mechanical damage to the membrane fibers, reducing membrane service life. Chemical cleaning involves the regular addition of certain concentrations of acids, alkalis, oxidants, etc., for soaking to remove pollutants and solve the fouling problem. However, chemical cleaning is a double-edged sword, as frequent chemical cleaning can accelerate the chemical decomposition of the membrane material, leading to performance degradation and reducing the membrane's service life.。。Membrane fouling prevention technology is a technique that reduces membrane fouling through intelligent dosing. It can prevent membrane fouling and extend the service life of membrane elements. This technology is developed by the company from the perspective of the overall water treatment system, targeting the control of membrane fouling. Based on the fluctuation of project water quality and other factors, this technology selectively chooses micro-flocculation to prevent membrane fouling, reduce the frequency of chemical cleaning of the membrane system, and restore the performance of the membrane system through backwashing, thereby extending the life of the membrane elements and improving the operational efficiency of the membrane system. It is particularly suitable for special water quality periods, such as deteriorating influent water quality or low temperature periods.。。Precise Dosing Technology。。For the operation of continuous working condition reverse osmosis systems, the accuracy of dosage, concentration, and dosing time of chemicals is particularly important. Improper dosing point configuration will result in the inability to accurately dose chemicals into the system, leading to fouling at the end of reverse osmosis. To address this issue, precise dosing control technology is adopted, which uses one-to-one dosing through a dosing diaphragm pump and a high-pressure pump, and PID interlocking with inter-stage flow meters. The dosing amount is matched in real-time based on the flow rate, achieving precise control of the dosing amount and avoiding unnecessary chemical waste or insufficient dosing leading to fouling on the concentrate side.。。Through comprehensive analysis of factors such as: ①water source water quality (turbidity, pH, conductivity, ORP, water temperature); ②membrane system operating status (inlet pressure, pressure difference); ③set operating conditions (membrane flux, recovery rate), precise control of the dosage of flocculants, reducing agents, scale inhibitors and other membrane system chemicals is achieved using precision flow meters, chemical pumps, and other equipment, ensuring that the concentration and dosage of the chemicals meet the set requirements.。。Characteristics and advantages of precise dosing control technology:。。Accuracy: Through precision flow meters, sensors, and automatic control systems, the dosage of chemicals can be monitored and adjusted in real time, ensuring precise and controllable concentration and dosage of the chemicals.。。Stability: The precise dosing control technology can effectively avoid the problem of unstable drug efficacy caused by fluctuations in the amount of medication, ensuring the stability and consistency of the medication.。。Economy: The precise dosing control technology can reduce drug waste and excessive use, improve drug utilization, and reduce production costs.。。Automation: The precise dosing control technology is usually combined with an automation control system to achieve automated operation and remote monitoring, improving production efficiency and management convenience.。。Safety: The precise dosing control technology can avoid safety hazards caused by human operational errors and excessive drug delivery, ensuring the safety of production and treatment.。。Compared with traditional dosing methods, accurate dosing control technology can reduce the dosage of chemicals, improve the stability of membrane systems, effectively prevent membrane fouling, and directly reduce the operating costs caused by chemical consumption.。。Water Plant Twin® Unmanned Control Technology。。GreenTech Environmental’s Digital Operation Management Platform is an intelligent management system launched by the company to adapt to the current trend of digital technology development and improve the efficiency of water treatment processes. This platform integrates advanced information technology, big data analysis, and artificial intelligence (AI) technologies, aiming to achieve intelligent operation management of water treatment processes, improve water treatment efficiency and quality, and reduce operating costs.。。GreenTech's "Water Plant Twin" integrates BIM design data, implementation process data, and operation data of engineering projects, recording the development process of physical water plants from scratch, as well as real-time operational status. It realizes the digital simulation of physical water plants and provides digital tools for asset management, remote monitoring, and intelligent operation of physical water plants.。。Values of the Water Plant Twin Operation Management Platform:。。Provide unmanned and efficient operation management for customers。。Evaluate system conditions, optimize production and operation decisions, and ensure stable production based on intelligent process algorithm models,。。Based on the digital expert system and Internet of Things sensing system, the system performs self-checks to ensure the healthy operation of equipment.。。By introducing artificial intelligence technology, intelligent inspection based on computer vision is achieved.。。Build a digital twin water plant based on BIM technology to finely manage the lifecycle data of the water plant.。。Realize optimization of intelligent control system and modular customization of each process module.。。The Water Plant Twin operation management platform is mainly composed of the following parts:。。Group comprehensive operation cockpit。。The platform will comprehensively manage the water plants under the group, realizing real-time monitoring of the operation status, production cost, energy consumption, water quality, and water quantity of multiple water plants, so as to comprehensively monitor and manage the operation of each water plant. Based on the GIS+BIM product technology architecture, the platform has created a flexible, efficient, and configurable user interface and data visualization platform, providing efficient product interfaces for operation experts. Combined with the model of the smart operation management platform inside the plant, it reduces the reliance on manual experience in the overall production and operation management of the group, while retaining the emergency handling manual takeover function authority.。。Water Plant Control Room。。The real-time data control room for water plant operation realizes real-time monitoring of process conditions and operational indicators. It comprehensively displays data on the operational performance, efficiency, and process of the water plant. By using efficient data visualization analysis tools, it achieves historical data curves for multi-parameter comparison, rich data visualization presentation forms, and three-dimensional interactive presentation based on BIM visualization. This platform has highly flexible and configurable features, and the visualization forms and layout of the control room can be dynamically configured according to different user needs, providing users with personalized data display and analysis functions. It can complete multiple process instruction executions and parameter value switches with one click, and manage the operation of the water plant according to different modes.。。Operating Condition Management。。Instead of the production process, the production scheduling decision-making process based on experience by technicians is replaced by data and algorithms to provide production scheduling instructions, realizing an unmanned and efficient operation management mode. Based on process simulation models, expert system models, and neural network models, the system's operating status is evaluated in real-time, optimizing production operation decisions and control system instructions. Without relying on manual experience, the system ensures stable production and comprehensively reduces production operation costs.。。System Self-Check。。Based on expert systems and neural network model systems, real-time evaluation of system equipment operating status. When data indicating faults or fault trends occur, preventive maintenance tasks and instructions are provided. It replaces the inspection process carried out by personnel based on sensory perception during production and operation, and judges the health of system operation based on technologies such as computer vision. Without relying on human experience and sensory perception, it ensures the healthy operation of system equipment and comprehensively reduces operating costs.。。Intelligent Security。。Realize the intelligent linkage of video surveillance, access control, smoke detection, and other security and fire protection systems. Based on computer vision technology, it achieves intelligent analysis and alarm functions for personnel behavior in the factory area, including perimeter management, restricted areas, climbing alarms, smoking alarms, open flame alarms, safety helmet alarms, personnel gathering alarms, and other intelligent supervision and alarm functions. It realizes dynamic area management in the factory area, and uses technologies such as Bluetooth for personnel area positioning, which can be used to manage and specify the operational norms of designated areas for personnel, and also provide warnings for dangerous behaviors such as personnel staying in an area for too long.。。Limited Space Management。。For limited space management, the platform provides four types of functions: labeling, monitoring, assisting, and rescuing. The goal is to ensure the safety and standardization of limited space operations. Establish a limited space platform account; install space air quality sensors to monitor the safety level of air quality; provide assistance in space operation work order procedures; provide rescue operation assistance. Customize the digital management process for limited space operations according to the municipal standards for limited space safety operations.。。Refined Management。。The platform provides maintenance and maintenance task management functions down to the equipment tag, ensuring that regular tasks such as maintenance, maintenance, and dosing can be completed on time and with good quality. The system will issue warning alarms for overdue maintenance and maintenance plans and dispatch work orders to designated personnel, driving digitalized operation and maintenance work. Maintenance and maintenance operations can be completed through mobile terminals to record operational data, and key actions and results can be recorded through photos or videos, comprehensively managing the performance of operation and maintenance personnel.。。Data Asset Management Center。。The platform regards the data generated during the production and operation process of the water plant as core assets, and carries out comprehensive governance and application. The platform data center provides data cleaning, distributed storage, unified interface management, and dynamic data processing toolchain to ensure the integrity and effectiveness of the platform data. It supports efficient access to macro smart cities and provides bidirectional data access support for the sub-systems within the plant. It also supports basic data management functions such as dynamically generating data reports.。。Project Overview。。Engineering Overview。。Project Background: Metro Pacific Water (MPW) has a 66.77 MLD ongoing seawater desalination project in Ilo-ilo City (an island in the Philippines located in the south), MPW is expecting the desalination project to be completed in late 2027 or early part of 2028. However, due to the immediate demand for water in the Ilo-ilo area, MPW is planning to install a modular brackish water treatment plant near the river, as part of their short-term requirement while the desalination plant is being constructed.。。Design Water Production: 5000 m³/d。。Design Standards and Specifications。。This proposal is prepared mainly based on the following standards and specifications:。。ANSI standard for piping & flanges。。IEC standard for electrical。。ISA standard for instrumentation。。Scope of work。。The scope of work includes the design, supply, installation, commissioning, and overall delivery of all membrane treatment equipment and their ancillary facilities such as pumps, valves, pipelines, electrical, and automatic control instrument systems within one meter outside the Newater House®, including the pretreatment.。。| No. | Unit | Responsible Party | Responsible Party |。。| --- | --- | --- | --- |。。| No. | Unit | Others | GreenTech |。。| Civil Engineering | Civil Engineering | √ | |。。| 1 | Foundation construction of the pre-treatment process | √ (Need to Meet Equipment Installation Requirements) | |。。| 2 | Foundation construction of the Newater House | √ (Need to Meet Product Installation Requirements) | |。。| Others | Others | √ | |。。| 1 | Plant area roads | √ | |。。| 2 | Plant area lighting | √ | |。。| 3 | Plant area rain and wastewater discharge facilities | √ | |。。| Boundaries of the Influent, Product Water, and Discharge; and Relevant Equipment | Boundaries of the Influent, Product Water, and Discharge; and Relevant Equipment | | |。。| 1 | Raw Water Inlet (Within 1 m from the defined boundary zone* of the pre-treatment, Newater House and their supporting water tanks; and related internal process equipment and pipelines) | | √ |。。| 2 | Raw water inlet (Beyond 1 m from the defined boundary zone of the pre-treatment, Newater House and their supporting water tanks; and related process equipment and pipelines) | √ | |。。| 3 | System water production (Within 1 m from the defined boundary zone of the pre-treatment, Newater House and their supporting water tanks; and related internal process equipment and pipelines | | √ |。。| 4 | System water production (Beyond 1 m from the defined boundary zone of the pre-treatment, Newater House and their supporting water tanks; and related process equipment and pipelines) | √ | |。。| 5 | Within 1 m from the defined boundary zone of the discharge sites of CIP, chemical dosing, and other wastes from the pre-treatment and Newater House | | √ |。。| 6 | System drainage (Pipelines beyond 1 m from the defined boundary zone of the pre-treatment, Newater House and their supporting water tanks) | √ | |。。| 7 | Sewage Sludge Pipeline (Within 1 m from the defined boundary zone of the pre-treatment, Newater House and their supporting water tanks) | | √ |。。| 8 | Sewage Sludge Pipeline (Beyond 1 m from the defined boundary zone of the pre-treatment, Newater House and their supporting water tanks) | √ | |。。| 9 | Reverse Osmosis Concentrate Pipeline (Within 1 m from the defined boundary zone of the pre-treatment, Newater House and their supporting water tanks) | | √ |。。| 10 | Reverse Osmosis Concentrate Pipeline (Beyond 1 m from the defined boundary zone of the pre-treatment, Newater House and their supporting water tanks) | √ | |。。| Electrical Engineering | Electrical Engineering | | |。。| 1 | Cables, cable conduits, cable trays, etc. between internal electrical equipment of the pre-treatment and Newater House: low-voltage distribution cabinets, low-voltage control boxes, etc.( low-voltage required is 380V) | | √ |。。| Instrumentation | Instrumentation | | |。。| 1 | All internal instruments, internal PLC cabinet cables, cable conduits, etc. of the pre-treatment and Newater House | | √ |。。| 2 | PLC cabinet cables, bridge frames, cable conduits, etc. that: connect external instruments that are controlled by the pre-treatment and Newater House, with the pre-treatment and Newater House | | √ |。。| Automatic Controls | Automatic Controls | | |。。| 1 | Internal PLC cabinets of the pre-treatment and Newater House | | √ |。。| 2 | Control cables, bridge frames, cable conduits, etc. that connect external control instruments with the pre-treatment + Newater House | | √ |。。| Compressed Air for Instruments | Compressed Air for Instruments | | |。。| 1 | Internal compressed air pipeline systems, etc. of the pre-treatment and Newater House | | √ |。。| Chemicals and Reagents | Chemicals and Reagents | | |。。| 1 | Chemicals, reagent consumption, water, and electricity during commissioning | √ | |。。| 2 | Chemicals, reagent consumption, water, and electricity after project acceptance | √ | |。。Designed Influent and Effluent Quality。。Designed Influent Quality。。The water source is surface water, which first undergoes a pretreatment process consisting of high-efficiency clarification tanks and multi-media filters before entering Newater House. According to the test results provided, the designed inlet water quality for this project is shown in the table below:。。Table 1: Design Influent Quality。。High Tide Water Quality Test Results。。| Parameter | Point 1 | Point 2 | Point 3 | Point 4 | Point 5 | Units |。。| --- | --- | --- | --- | --- | --- | --- |。。| Total Coliforms | 35,000 | 3,500 | 240,000 | 4,900 | 92,000 | MPN/100mL |。。| Fecal Coliforms | 24,000 | 2,400 | 92,000 | 1,100 | 35,000 | MPN/100mL |。。| E. coli | 13,000 | 1,300 | 92,000 | 1,100 | 35,000 | MPN/100mL |。。| Color @ pH=8.5 | 60 | 40 | 32 | 32 | 32 | Apparent CU |。。| Color @ pH=8.3 | 25 | 15 | 15 | 10 | 10 | TCU |。。| Turbidity | 20 | 26 | 13 | 15 | 16 | NTU |。。| Conductivity | 16,100 | 29,100 | 32,600 | 35,800 | 38,300 | µS/cm |。。| BOD | 2 | 1 | 3 | 2 | 1 | mg/L |。。| COD | 475 | 467 | 257 | 713 | 697 | mg/L |。。| TDS | 10,300 | 20,200 | 20,900 | 22,900 | 25,300 | mg/L |。。| TSS | 17 | 16 | 14 | 42 | 25 | mg/L |。。| Chlorine, residual | <0.02 | <0.02 | <0.02 | <0.02 | <0.02 | mg/L |。。| Chlorophyll | <1.0 | <1.0 | <1.0 | <1.0 | <1.0 | mg/m3 |。。| Salinity as NaCl | 9,760 | 19,700 | 19,800 | 20,700 | 23,900 | mg/L |。。Low Tide Water Quality Test Results。。| Parameter | Point 1 | Point 2 | Point 3 | Point 4 | Point 5 | Units |。。| --- | --- | --- | --- | --- | --- | --- |。。| Total Coliforms | 16,000 | 3,500 | 13,000 | 17,000 | 22,000 | MPN/100mL |。。| Fecal Coliforms | 2,400 | 2,400 | 2,300 | 7,000 | 22,000 | MPN/100mL |。。| E. coli | 2,400 | 2,400 | 1,300 | 7,000 | 11,000 | MPN/100mL |。。| Color @ pH=8.5 | 75 | 60 | 60 | 32 | 40 | Apparent CU |。。| Color @ pH=8.3 | 25 | 25 | 25 | 25 | 25 | TCU |。。| Turbidity | 40 | 29 | 23 | 14 | 16 | NTU |。。| Conductivity | 8,760 | 10,800 | 11,500 | 13,500 | 16,100 | µS/cm |。。| BOD | 6 | 6 | 2 | 2 | 3 | mg/L |。。| COD | 301 | 350 | 370 | 358 | 260 | mg/L |。。| TDS | 6,010 | 7,050 | 8,010 | 9,090 | 10,600 | mg/L |。。| TSS | 40 | 49 | 18 | 17 | 16 | mg/L |。。| Chlorine, residual | <0.02 | <0.02 | <0.02 | <0.02 | <0.02 | mg/L |。。| Chlorophyll | <1.0 | <1.0 | <1.0 | <1.0 | <1.0 | mg/m3 |。。| Salinity as NaCl | 4,920 | 5,930 | 7,570 | 7,230 | 9,760 | mg/L |。。Designed Effluent Quality。。Newater House® Produced Permeate Quality。。Table 2: Newater House Produced Permeate Quality。。| Parameter | Units | Produced Permeate Requirement |。。| --- | --- | --- |。。| Total Coliforms | MPN/100mL | <1 |。。| Fecal Coliforms | MPN/100mL | <1 |。。| E. Coli | MPN/100mL | <1 |。。| Color @ pH=8.5 | Apparent CU | 10 |。。| Color @ pH=8.3 | TCU | 5 |。。| Turbidity | NTU | 5 |。。| Conductivity | µS/cm | Not Monitored |。。| BOD | mg/L | 1 |。。| COD | mg/L | 2 |。。| TDS | mg/L | 600 |。。| TSS | mg/L | 10 |。。| Hardness | mg/L | 150 |。。Process Flow Balance。。Pretreatment Process Design。。Introduction。。For this Project, pre-treatment mainly integrates high-efficiency clarification and multimedia filtration units and their supporting equipment, thereby achieving stable water quality for the Newater House. The working principles of the main process units are as follows:。。High-efficiency clarification tank。。The provided quality test data show that the raw water quality is unstable and the turbidity fluctuates significantly during the day. This poses high requirements for the pre-treatment process, as it is difficult to quickly adjust the chemical dosage based on rapid changes in water quality. The high turbidity and instability also pose difficulties for flocculation and sedimentation, requiring highly efficient coagulation and sedimentation processes with auxiliary agents. Even in the case of efficient flocculation, the formed flocs can easily float out of the sedimentation tank with the rising water flow, affecting effluent quality. It is difficult for conventional flocculation and sedimentation processes to achieve ideal sedimentation effects. The size of suspended particles is in between colloids and macroscopic particles. As a result, the compressed double electric layer effect has minimal effect on such suspended particles, and it is difficult for flocculants to achieve the adsorption bridging effect, leading to increased chemical dosing, thereby increasing the operating cost of the project and affecting the safe operation of the subsequent system.。。The high-efficiency clarification tank is a new type of clarification tank that combines the functions of coagulation, flocculation, sedimentation, and sludge concentration after the development of plug flow sedimentation tank, inclined plate (tube) sedimentation tank, and mechanical acceleration (pulse) clarification tank. It is divided into mixing zone, flocculation zone, settling zone, and pH adjustment zone. A rapid mixer is installed in the mixing zone to quickly disperse the added coagulant and form small flocs. The pre-coagulated raw water flows to the bottom of the circular baffle in the reaction tank, then mixed evenly with the refluxed sludge from the bottom to the top by mixing blades in the baffle. High sludge concentration improves the coagulation effect. The mixture then enters the settling zone for rapid settling and concentration. In the settling zone, the remaining flocs are retained on the inclined tubes and fall to the bottom of the tank, ensuring the effluent quality. After pH adjustment, a part of the concentrated sludge is pumped by the sludge circulation pump to the inlet of the reaction tank in the concentration zone, and the other part is discharged to the sludge dewatering room or undergoes other treatments. The sedimentation net removes COD by capture and adsorption using the reflux sludge flocculation technology, and it can buffer the impact of water quality fluctuations on subsequent units.。。Process principle can be seen in the following schematic diagram:。。Multi-Media Filters。。The main purpose of setting up the filter is to trap suspended solids and colloids in the effluent of the high-efficiency clarifier, ensuring the stable operation of subsequent units. The filter media mainly consists of quartz sand and anthracite coal.。。All internal pipelines are connected to the body using flanges, considering the convenience of maintenance and component replacement. The material of internal components meets the required specifications, and the fasteners are equivalent to the material of internal pipelines. The inner surface of the unit is lined with acid-resistant rubber, and the lining extends to the flange joint surface. It has undergone spark testing to ensure leakage free. The body piping system of the exchanger is made of corrosion-resistant carbon steel.。。The material of the equipment peep mirror is transparent and corrosion-resistant, and its thickness can withstand the design pressure of the container and the test pressure during testing. The inner surface of the peep mirror is flush with the inner surface of the container. The manhole of the container ensures the entry and replacement of maintenance personnel. The inner surface of the manhole and manhole cover is flush with the inner surface of the container. The manhole is equipped with a complete set of related components such as a manhole cover, gasket, bolt, nut, and lifting rod.。。The internal water inlet, air inlet, water collection, and air collection devices of the unit are evenly distributed without bias flow. The internal water distribution method: the upper part of water distribution uses a dome-shaped orifice plate, and the lower part uses a porous plate cap. Except for equipment that needs to be manufactured on-site, all internal devices, fittings, and components of the container are installed and fixed inside the container before delivery to prevent damage or loss during transportation.。。The backwashing system of the filter can be automatically controlled or manually controlled, and the automatic backwashing is controlled by cumulative time. Each filter is equipped with a complete set of pneumatic control valves.。。Newater House® Process Design。。Main Functional Units of Newater House®。。Newater House integrates ultrafiltration and reverse osmosis process units and supporting equipment to achieve high-quality water supply. The working principles of the main process units are as follows:。。Ultrafiltration Process Unit。。Ultrafiltration is a membrane filtration technology that mainly removes suspended particles, turbidity, and large organic molecules from water. Ultrafiltration provides stable, good-quality effluent which extend the service life of the subsequent reverse osmosis system. It has good retention effects on suspended solids and microorganisms (with nearly 99% removal). It can withstand shock loads in water quality, while requires less chemical consumption and has low operation and maintenance costs. Compared to traditional multimedia filtration and activated carbon filtration, ultrafiltration can greatly reduce the footprint and lower the investment cost of civil construction. The main indicator of ultrafiltration's effluent quality is a stable SDI value of less than 3.。。The ultrafiltration water supply pumps pressurize water and send it to the ultrafiltration self-cleaning filter. Suspended particles with a diameter greater than 200µm are removed, also protecting the ultrafiltration membrane elements from being damaged by large particles. The self-cleaning filter needs to be backwashed regularly. The pressurized water filtered by the self-cleaning filter enters the ultrafiltration membrane module. Due to the characteristics of the ultrafiltration membrane itself, most bacteria, algae, colloidal substances, and small particles (larger than 0.02 micrometers) are retained on the surface of the membrane, while water and water-soluble substances pass through the membrane pores, purifying the water quality in the membrane system. Through the filtration of the ultrafiltration membrane, SS and colloidal substances are basically removed.。。After a certain period of filtration, a layer of contamination will be deposited on the surface of the membrane, and the membrane elements need to be backwashed. The backwash water pump pressurizes the ultrafiltration effluent and enters the system through the ultrafiltration effluent pipe. The pressurized backwash water flushes the contaminants on the membrane surface out of the system, restoring the flux of the membrane elements. Since water contains various bacteria, organic matter, inorganic matter, etc., backwashing with only clean water cannot completely restore the membrane flux. Therefore, after a certain period of filtration of the membrane elements, the membrane needs to be chemically cleaned with CEB cleaning agent to thoroughly remove the contaminants on the membrane surface. The wastewater after backwashing can be directly returned to the upstream treatment units.。。During the design of this system, the influence of water quality and quantity was fully considered. The system operates under the condition that the design temperature and influent water quality meet the requirements. When seasonal temperature changes or other factors cause water temperature fluctuations, the membrane flux would be affected due to thermal expansion and contraction of the membranes and the change in water viscosity. Generally, an increase in temperature leads to an increase in membrane flux, while a decrease in temperature leads to a decrease in membrane flux. In this project, certain measures are taken (such as setting a frequency converter for the ultrafiltration water supply pump and setting a pneumatic regulating valve in front of each group of ultrafiltration devices) to maintain a constant membrane flux by adjusting the membrane pressure difference through the frequency conversion of the ultrafiltration water supply pump or the pneumatic regulating valve when the temperature changes within a certain range (i.e., constant flow and variable pressure operation).。。Reverse Osmosis Process Unit。。1. Filtration Process。。Reverse osmosis system is the core of this project, for the removal of small organic molecules and salts in wastewater. Reverse osmosis adopts a spiral membrane module. It is a pressure separation process using a semi-permeable membrane.。。Pollutants/salts are concentrated on the concentrate side, exceeding their natural solubility in water, causing scaling on the concentrate side. Different scale inhibitors are applied to disrupt the formation of scaling on the concentrate side of the reverse osmosis membrane and reduce the tendency of scaling in the crystal lattice structure.。。After a period of operation, water hardness on the concentrate side would be 3-4 times higher than that of the feed. Due to concentration polarization, various types of fouling may occur on the membrane surface, resulting in declined membrane performance, water production, and desalination rate. In this case, chemical cleaning must be carried out to restore the membrane's water permeability. The cleaning cycle should take place when the membrane operating pressure increased by 10% under the same production rate, or water production rate decreased by 10% under the same pressure. If the membrane flux recovery is good, water production rate can be restored to a level close to the original.。。When the reverse osmosis system is shut down for any reason, water hardness inside the membrane elements stays high at 3-4 times that of the feed. In the case of stagnant water flow, deposition of pollutants and fouling is easy, contaminating the membrane components. The designed reverse osmosis system has an online automatic flushing device. When the system is shut down, the membrane surface can be automatically flushed to replace the contaminated water on the membrane surface with purified water, reducing the pollution of surface deposits and ensuring the normal lifespan of the membrane elements.。。2. Chemical Cleaning (CIP) Process。。After long-term operation, RO membrane elements may be contaminated by difficult-to-flush deposits, such as the long-term accumulation of trace salts and organic matter, resulting in declined membrane performance and increased operating pressure. Therefore, chemical cleaning must be carried out using chemical agents to restore their normal desalination capacity. The reverse osmosis CIP chemical cleaning device consists of one cleaning water pump, one cleaning security filter, and one cleaning water tank. The cleaning of reverse osmosis is carried out in segments to achieve the best cleaning effect.。。3. System Shutdown。。If the reverse osmosis system needs to be shut down for a long time, in order to prevent bacterial contamination, a special maintenance procedure will be strictly followed. Attentions must be paid to:。。• Preventing the reverse osmosis membrane elements from drying out.。。• Adopting appropriate protective measures to prevent microbial growth or conducting regular flushing every 24 hours.。。• Avoiding the influence of extreme temperatures on the system.。。The maximum shutdown time for a reverse osmosis system without any measures is 24 hours. If it is not possible to flush the system every 24 hours but it must be shut down for more than 48 hours, chemical agents must be used for preservation.。。Before shutting down the reverse osmosis system, a chemical cleaning should be performed, which typically includes alkaline washing, sterilization, and short-term acid washing. After cleaning, the protective solution (1%~3% sodium sulfite) should be prepared and filled into the system, ensuring that the components are completely immersed in the protective solution. After confirming that the system is fully filled with the protective solution, close all valves to isolate the system from the air.。。Regularly inspect and replace the protective solution. During the shutdown period, the ambient temperature of the system must not exceed 45℃.。。Configuration List。。| | Name | Specifications | Unit | Quantity |。。| --- | --- | --- | --- | --- |。。| | Pretreatment System | | | |。。| 1 | High-Efficiency Clarification Tank | Water Treated Scale 7,740 m3/d, mainly including a high-efficiency clarifier device and its supporting electrical control system | Set | 1 |。。| 2 | Multi-Media Filtering System | Water Treated Scale 7,740 m3/d, mainly including multi-media filter system device and supporting electrical control system | Set | 1 |。。| | Newater House® | External Water Supply Scale 5,000m3/d, including ultrafiltration device, reverse osmosis device, and supporting electrical control system | Set | 1 |。。| 1 | Ultrafiltration System | Net Water Production ≥7,353m3/d, including ultrafiltration membrane elements, membrane frames, valve frames, etc. | Set | 1 |。。| 2 | Reverse Osmosis System | Net water production≥ 5,000m3/d, including reverse osmosis membrane elements, membrane frames, valve frames, etc. | Set | 1 |。。| 3 | Low-voltage electrical and control system | Matching with the system | Item | 1 |。。| 4 | Matching water tank | Matching with the system | Item | 1 |。。| 5 | Internal pipe material | Matching with the system | Item | 1 |。。| 6 | Internal cable tray | Matching with the system | Item | 1 |。。| 7 | Digital operation system | Matching with the system | Item | 1 |。。| 8 | Lighting, HVAC, fire protection, lightning protection and grounding | Matching with the system | Item | 1 |。。| 9 | Plant (Color steel plate + aluminum mesh) | Matching with the system | Item | 1 |。。| 10 | Installation | Matching with the system | Item | 1 |。。Overall System Design Parameters。。The key design parameters of the main process units in this project are summarized in the following table:。。| | | Design Parameters | Unit | Remarks |。。| --- | --- | --- | --- | --- |。。| High-Efficiency Clarification Tank | High-Efficiency Clarification Tank | High-Efficiency Clarification Tank | High-Efficiency Clarification Tank | High-Efficiency Clarification Tank |。。| 1 | Treatment Capacity | 7740 | m³/d | |。。| 2 | Sludge Recirculation Ratio | 2~5% | | Flow Rate Adjustable |。。| 3 | Flocculation Tank Retention Time | 1.7 | min | |。。| 4 | Coagulation Tank Retention Time | 13.4 | min | |。。| 5 | Upflow Velocity of Sedimentation Zone Inclined Tube | 10 | m3/(m2.h) | |。。| 6 | Number of Equipment | 2 | | |。。| | Multi-media Filters | Multi-media Filters | Multi-media Filters | Multi-media Filters |。。| 1 | Treatment Capacity | 7740 | m³/d | |。。| 2 | Filter Media | Quartz Sand Cushion Layer: 150mm Quartz Sand Filter Layer: 800mm Anthracite Filter Layer: 400mm | mm | |。。| 3 | Design Filtration Rate | ＜10 | m/h | |。。| 4 | Air Flushing Intensity | 15~20 | L/(s·m2) | |。。| 5 | Water Flushing Intensity | 13~16 | L/(s·m2) | |。。| 6 | Number of Equipment | 5 | | |。。| | Newater House | Newater House | Newater House | Newater House |。。| 1 | Ultrafiltration Unit | Ultrafiltration Unit | Ultrafiltration Unit | Ultrafiltration Unit |。。| | Treatment Capacity | 7740 | m³/d | |。。| | Design Operating Time | 24 | h | |。。| | System Recovery Rate | ≥95% | | |。。| | Design Flux | ≤50 | LMH | |。。| | Number of Equipment | 2 | | |。。| 2 | Reverse Osmosis Unit | Reverse Osmosis Unit | Reverse Osmosis Unit | Reverse Osmosis Unit |。。| | Treatment Capacity | 7353 | m³/d | |。。| | Design Operating Time | 24 | h | |。。| | System Recovery Rate | ≥68% | | |。。| | Design Flux | ≤16 | LMH | |。。| | Number of Equipment | 2 | | |。。OPEX Evaluation。。Power Consumption。。| | System | Installed Power (kW) | Operating Installed Power (kW) | Daily Power Consumption (kWh) | Annual Power Consumption (104 kWh) |。。| --- | --- | --- | --- | --- | --- |。。| Pretreatment | Pretreatment | Pretreatment | Pretreatment | Pretreatment | Pretreatment |。。| 1 | High-Efficiency Clarifier | 84 | 60.75 | 1266 | 45 |。。| 2 | Multi-Media Filter | 85 | 48 | 355 | 12 |。。| Newater House® | Newater House® | Newater House® | Newater House® | Newater House® | Newater House® |。。| 1 | UF System | 274 | 174 | 723 | 25 |。。| 2 | RO System | 858 | 857 | 20630 | 757 |。。| | Total | 1301 | 1140 | 22974 | 841 |。。Chemical Consumption。。| NO. | Chemical consumption | Unit: tons/year |。。| --- | --- | --- |。。| 1 | PAC（30.0%） | 96.99 |。。| 2 | PAM (Anionic 88.0%) | 1.61 |。。| 3 | Sodium hydroxide (30.0%) | 5.75 |。。| 4 | Citric acid (98%) | 6.70 |。。| 5 | Sodium Hypochlorite (10.0%) | 153.29 |。。| 6 | Anti-scalant for Reverse Osmosis (100.0%) | 8.05 |。。| 7 | Reductant (90.0%) | 5.98 |。。| 8 | Non-oxidizing Biocide (100.0%) | 6.44 |。。Note: The above consumption is calculated at 20°C and TDS of 22,900 mg/L. It can be adjusted according to subsequent changes in water quality or further refinement.。。Membrane depreciation。。The designed service life for ultrafiltration membranes is 5 years, and for reverse osmosis membranes is 3 years. Cartridge Filter Elements need to be changed every 3 months. However, the service lives mentioned above can be extended with careful maintenance