Reclaimed water with a capacity of 1000TPD per day costs only about 2.5 yuan

Project Introduction

Abstract: This project is located in Anqing and aims to solve the problem of high ammonia nitrogen treatment and reuse of industrial wastewater. By deploying efficient ultrafiltration (UF) and reverse osmosis (BWRO) dual membrane processes, a daily water reuse capacity of 1000 tons has been achieved. The system successfully treated high TDS (total dissolved solids) wastewater to reuse standards, with operating costs controlled at a highly competitive 2.5 yuan/ton.

1.Project Overview

Project Name	Anqing Reclaimed Water Ultrafiltration Reverse Osmosis Membrane System Project
Project Type	Procurement of ultrafiltration and reverse osmosis membrane system equipment
Project address	Anqing, China
Project Launch	December 2021
Project Delivery	January 2022
Project Status	Delivered

2.Project background and requirements

In the chemical, electronic, and pharmaceutical industries, the treatment of high ammonia nitrogen wastewater has always been a "roadblock" to environmental compliance. The Anqing project is facing typical challenges in industrial wastewater treatment:
Challenge of high salinity and high TDS: The raw water TDS can reach up to 12000 mg/L and contains high concentrations of chloride ions (Cl ^ -) and sulfate ions (SO4 ^ {2-}), which puts extremely high demands on the anti pollution ability and desalination rate of the membrane system.
Strict reuse standards: Customers not only require wastewater to meet discharge standards, but also demand that the produced water be reused in the production process, which means that the system must have extremely high organic matter (COD) and ion removal rates.
Operating cost control: Balancing treatment efficiency with energy consumption and chemical costs is the key to project success in large-scale water treatment scenarios (1000 tons/day).

2.1 Solution: Double membrane deep treatment process

In response to the above pain points, we have adopted a combination process of "ultrafiltration pretreatment+deep desalination of brackish water by reverse osmosis (BWRO)".
Core equipment selection: A total of 50 BWRO-8040-400FR anti pollution reverse osmosis membrane elements were selected. This model of membrane element is designed specifically for high pollution potential brackish water, with a wider inlet channel that can effectively reduce the risk of membrane surface scaling and extend the cleaning cycle.
Process flow logic:

Ultrafiltration (UF) interception: Firstly, suspended solids (SS) and some large organic molecules in the water are removed through the ultrafiltration system, reducing SS from 20 mg/L to 1 mg/L, providing high-quality influent for the reverse osmosis system.
Reverse osmosis (RO) desalination: Using a high-pressure pump to drive water through a semi permeable membrane, efficiently intercepting dissolved salts, bacteria, viruses, and small organic matter.

3.Project effectiveness and economic benefits

Core data performance (measured processing effectiveness)

Stage 1: Pre treatment effect of ultrafiltration system (UF)
The ultrafiltration system mainly solves the problem of suspended solids pollution and provides protection for the subsequent RO membrane.

Indicator	Influent water quality	Effluent quality	Removal rate
Suspended Solids (SS)	20 mg/L	1 mg/L	95%
Chemical Oxygen Demand(COD)	160 mg/L	128 mg/L	20%
Water Treatment Capacity	42 m³/h	42 m³/h	-

Stage 2: Deep purification effect of reverse osmosis system (RO)
This is the core part of the project, and the system demonstrates strong desalination and pollutant retention capabilities.

Key metrics	Inlet water (ultrafiltration effluent)	Produced water (recycled water)	Removal rate
Conductivity	18,240 µs/cm	1,500 µs/cm	92%
TDS (dissolved solids)	-	显著降低	-
Chloride ion(Cl)	1106 mg/L	88 mg/L	92%
Sulfate(SO₄²⁻)	2452 mg/L	196 mg/L	92%
Iron(Fe)	0.14 mg/L	0.01 mg/L	93%
COD	128 mg/L	40 mg/L	69%

Even in the face of an incoming water with a conductivity of up to 18240 µ s/cm, the system can still produce high-quality recycled water with a conductivity of only 1500 µ s/cm, and the desalination rate remains stable at over 92%, fully meeting the needs of industrial reuse.

Project Value and Advantages

Extremely high resource recovery rate:
The system has an inlet flow rate of 42 m ³/h, a production flow rate of 30 m ³/h, and a water recovery rate of approximately 71%. This means that for every 100 tons of wastewater treated, 71 tons can be turned into treasure and returned to the production line, greatly reducing the amount of fresh water used by the enterprise.
Excellent anti pollution performance:
By using BWRO-8040-400FR anti fouling membrane components, the system effectively addresses high COD and high hardness water quality, ensuring long-term stability during operation.
Highly competitive operating costs:
While achieving a processing capacity of 1000 tons per day, we will control the comprehensive operating cost at approximately 2.5 yuan per ton. This data has significant cost advantages in similar high difficulty wastewater treatment projects, helping customers quickly recoup their environmental investments.

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