The complexity of industrial wastewater makes 90% of the technical content of advanced treatment processes rely on membrane process pretreatment. The company has been researching in this area for over ten years. By adopting a variety of new technologies with independent intellectual property rights such as "physical-chemical + biochemical + membrane treatment" and continuously applying them to industrial practice, and further optimizing and innovating, a number of new products and materials based on core technologies have also been continuously launched into the market.

Industrial wastewater reuse technology is a technical system that purifies wastewater generated in industrial production to specific water quality standards through multi-dimensional treatment methods such as physical, chemical and biological means, achieving the recycling of water resources. It can not only reduce the consumption of fresh water in industry, but also decrease the discharge of wastewater. It is a dual powerful tool to solve the problems of "water shortage" and "pollution worry" in industry, and is widely used in high-water-consuming industries such as chemical engineering, steel, textile and power.

I. Core Technical Logic: Hierarchical processing to adapt to reuse requirements

Industrial wastewater is complex in composition (containing heavy metals, organic matter, salts, etc.), and the reuse technology should follow the principle of "graded treatment and adaptation as needed". According to the differences in reuse targets, the treatment degree is divided into three levels: The primary treatment mainly uses physical methods, removing suspended particles and floating matter through grilles and sedimentation, serving as pretreatment to reduce the subsequent load; Secondary treatment employs biological or chemical methods to degrade organic matter (such as COD and BOD) and some pollutants, thereby bringing the water quality up to the standard for non-potable water. Tertiary treatment is advanced purification, which removes salts and trace pollutants through membrane separation, adsorption and other technologies to meet the requirements of production process water.

Ii. Mainstream Technology Types: Collaborative application of multiple processes

It can be classified into four major categories according to the processing principle. Biological treatment technology is the core of secondary treatment, including activated sludge process, biofilm process, etc. It utilizes microorganisms to degrade organic pollutants and is suitable for treating high-organic wastewater from industries such as food and papermaking, with COD removal rates reaching 80% to 90%. Membrane separation technology is the key to advanced treatment. Processes such as reverse osmosis (RO), ultrafiltration (UF), and nanofiltration (NF) can precisely retain salt ions and small molecule impurities. After a certain electronics factory applied RO technology, the quality of the wastewater reused met the standards for chip cleaning. Adsorption and oxidation technologies are applicable to refractory wastewater. Activated carbon adsorption can remove pigments and odors, while Fenton oxidation and ozone oxidation can decompose toxic organic substances, facilitating the reuse of chemical wastewater up to standard. Evaporation crystallization technology is aimed at high-salt wastewater. Through evaporation concentration and crystallization separation, it realizes the recovery of salts and the reuse of water resources, solving the problem of high-salt wastewater treatment.