在我国工业生产中，通常会产生大量的酸性或碱性废液，其中含有不同浓度的金属离子和酸碱。直接排放不仅浪费资源，而且对环境造成严重污染。为了保护环境免受污染和回收有用的物质，酸碱废液在排放前需要进行净化处理。国内外对这类废水的处理大多采用中和处理，这种处理方式容易造成二次污染。渗透、反渗透、纳滤、超滤、透析等新型膜技术，可有效避免二次污染。

膜技术作为一种新的分离技术，可以有效净化废水，回收有用物质，具有节能、低耗、无污染、设备简单、操作方便等特点，在pH值方面显示出广阔的前景。的废水处理。
 
1.酸性环境

经测试的酸性溶液（部分）：

· 20% H ₂ SO ₄

· 20% 盐酸 

· 30% H ₃ PO ₄

· 4% HNO ₃

酸性环境中的典型应用：

· 净化酸和去除金属阳离子

· 浸出后酸的回收

· 矿物酸脱色

· 溶解化学品的回收

· 酸溶液中离子的浓缩和回收

·   Some conventional applications that need to be used for corrosive strong acid cleaning

·   Chemical industry: the recovery of acid and the final product in the process of producing acid medium

·   Food, beverage and dairy industry: purify the acid after the use of the CIP process and reuse in the process of production and the cleaning of equipment.

·   Recovery of metals from the extractive solution, such as copper, zinc, cobalt, molybdenum, tungsten, uranium, gold, etc..

·   Reducing the cost of operation and sewage treatment

·   Recovery of high value metals from emission and industrial waste water

·   Pre separation of copper and gold in the process of carbon slurry to improve the extraction rate of subsequent gold.

 
2. Alkaline environment

The tested alkaline solutions include:

·   4% NaOH

·   10% NaOH

·   20% NaOH

·   20% KOH

Typical applications in alkaline environment

·   Recovery of alkaline current (sodium hydroxide, potassium hydroxide)

·   Recovery of metal in alkaline flow

·   Recovery of used electrolyte

·   Reducing COD content before neutralizing industrial waste water

·   Recovery of alkaline solution for cleaning containers and equipment

·   Some conventional applications that need caustic alkali cleaning

·   Pulp and artificial fiber: purification of caustic soda from hemicellulose and other organic pollutants to make sodium hydroxide reusable up to 95%

·   Food, beverage and dairy products: Purification of waste lye washing flow (CIP) solution and regenerated solution (in Decolorization of sugar) after ion exchange, to make the repeated use rate of sodium hydrate up to 95%;

· 化工：用于许多碱性环境生产操作的碱回收和最终产品浓缩。

 
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GUOCHU TECHNOLOGY (Xiamen) Co., Ltd. is a high-tech enterprise focusing on membrane technology as the core technique, dedicating to the development of new purification technology, for the biological pharmaceutical, food and beverage, fermentation industry, deep processing of agricultural products, plant extraction, petroleum and petrochemical industry, water treatment, air cleaning, chemical industry and other industries to provide comprehensive filter service and purification solution to fit the personalized requirement from different customers. We are using our membrane technology, ion exchange, and liquid chromatography and other high-tech approaches to better serve our customers by integrating and improving their production line from upstream and downstream. We are dedicating to be a professional service provider to help you find the solutions to reduce investment outlay, save running cost, decrease resource consumption, improve product quality, clean manufacture environment, and upgrade industries.
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