Adopting targeted emission reduction and separation technology in wastewater disposal is a green development direction. It can not only effectively recover valuable substances and reduce production costs, but also greatly reduce subsequent disposal pressure.
Current situation of chemical and pharmaceutical wastewater industry
Production wastewater from chemical industries such as coal chemical industries and pharmaceuticals such as pesticide industries contains a large number of toxic and harmful substances. On the one hand, it increases the concentration of organic matter in wastewater and seriously affects the difficulty of subsequent disposal of wastewater. On the other hand, most of these substances are raw materials needed in the production process, and their direct disposal and emission results in waste of resources.
Production wastewater from chemical industries such as coal chemical industries and pharmaceuticals such as pesticide industries contains a large number of toxic and harmful substances. On the one hand, it increases the concentration of organic matter in wastewater and seriously affects the difficulty of subsequent disposal of wastewater. On the other hand, most of these substances are raw materials needed in the production process, and their direct disposal and emission results in waste of resources.
Technology for directional separation and resource utilization of chemical and pharmaceutical wastewater
"Pollutants are misplaced resources." Pollutants produced by chemical and pharmaceutical production are more non-renewable resources: precious metals, energy substances, highly nutritious foods, scarce drugs... Therefore, adopting targeted emission reduction and separation technology in wastewater disposal is a green development direction. It can not only effectively recover valuable substances and reduce production costs, but also greatly reduce subsequent disposal pressure. "Chemical and pharmaceutical wastewater resource utilization targeted emission reduction technology" includes: nanofiltration membrane gradient dialysis technology, quasi-chromatography-like separation technology, directional salt stabilization fractionation purification technology, evaporation and rectification combined separation technology, reverse emulsion ultrafiltration separation technology, high concentration Waste acid recovery and treatment technology, etc., have been mature and applied to actual chemical and pharmaceutical wastewater resource utilization targeted emission reduction processes. Including:
Recovery and utilization of manganese-cobalt catalysts in crystallization mother liquor during PTA production process
Recycling of unreacted raw materials in crystallization mother liquor during PTA production process
Recycling of carrier solution in crystallization mother liquor during PTA production process
Non-phase change recycling and purification of ethyl acetate waste liquid in pharmaceutical industry
Resource recovery process technology of hydrazine hydrate waste liquid
Gradient dissolution control process for plant extract impurities
All-aqueous phase purification replaces organic solvent extraction process
Extraction and recovery of ammonia water from high-ammonia nitrogen wastewater
Recovery of mixed salts by phase-separated crystallization
Emission reduction technology with alumina gel composite replacing sulfate protein coagulant