1. scope of application

Coal chemical industry, petrochemical industry, natural gas/shale gas extraction

2. Brief description of technology

This technology has developed advanced oxidation technology and equipment represented by three-dimensional electrocatalysis, formed a bioaugmentation technology coupled with a granulated highly salt-tolerant compound bacterial agent and a multifunctional biological enhancer, and built a low-cost multi-membrane coupled concentration technology and equipment, combined with separate crystallization technology to realize the resource utilization of inorganic salts such as sodium chloride, sodium sulfate, and sodium nitrate in wastewater, and prepared calcium sulfate whiskers with high length-diameter ratio based on crystal form control and high-value conversion technology and equipment of calcium and magnesium resources. Inorganic functional materials such as high-strength gypsum significantly improve process economy, and integrate and optimize relevant unit technologies to form a green resource treatment process suitable for different wastewater.

3. technical information

Mixed salt reduction is reduced by 96%, and the product meets corresponding national standards

4. comprehensive benefits

At present, the existing traditional zero-emission process for high-salt wastewater faces problems such as high energy consumption and high operating costs in the evaporation and crystallization process. In particular, the by-product mixed salt is a hazardous waste due to organic pollutants, and its treatment cost is as high as 3000 yuan/ton., and there is a risk of secondary pollution. Based on traditional processes, this technology effectively reduces the environmental risk of high-salt wastewater through low-cost advanced oxidation, biological treatment and other organic degradation technologies. It adopts separate crystallization and reactive crystallization technologies, combined with low-cost coupled membrane concentration technology to realize wastewater inorganic salts. Resource recovery and high-value conversion and utilization effectively improve the environmental friendliness and economy of the wastewater treatment process. The practical results of the 3600 tons/day coal chemical industry high-salt wastewater zero-emission project show that this technology can achieve a reduction of more than 96% of mixed salt in high-salt wastewater, and can achieve economic benefits of about 5 yuan per ton of water under some water quality conditions, effectively supporting The sustainable operation of the high-salt wastewater zero-emission treatment process has obvious social, ecological and economic benefits.