2results about How to "Resolve enrichment" patented technology

The present invention discloses a method for treating organic phosphine wastewater by using homogeneous catalytic wet oxidation, which includes a wet oxidation section, a biochemical treatment section and a phosphorus recovery section; the organic phosphine wastewater, the homogeneous catalyst and the mother liquor of the single membrane electrodialysis are mixed and heated by heat exchange, and then the wet oxidation treatment is carried out, and then the acid adjustment tank is entered after cooling, and then nanofiltration is carried out, the nanofiltration concentrated water enters the single membrane electrodialysis treatment, the single membrane electrodialysis mother liquor is returned to the regulating tank, the anion liquid enters the phosphorus recovery section, and the nanofiltration produced water enters the biochemical treatment section; the biochemical treatment section includes an alkali adjustment tank, a biochemical unit and an effluent monitoring tank in sequence, and the phosphorus recovery section includes a reaction tank and a concentration crystallization unit, and finally forms a product struvite. In view of the characteristics of high COD, high organic phosphorus, high toxicity and difficult degradation of organic phosphine wastewater, the present invention adopts a treatment process with homogeneous catalytic wet oxidation as the core, giving full play to the characteristics of high catalytic activity and strong treatment capacity of homogeneous catalytic wet oxidation, and finally achieving the standard discharge of organic phosphine wastewater.

This invention discloses a method for multi-stage treatment of copper-containing wastewater based on graphene oxide-assisted electric field-driven process. The method utilizes a graphene oxide-assisted N / O / S multi-coordinated copper ion-imprinted cation exchange membrane as the selective separation interface, employs a membrane arrangement of graphene oxide-assisted copper ion-imprinted cation exchange membrane—anion exchange membrane—cation exchange membrane, and utilizes an electric field for migration and release, with endogenous carbonate as the circulating crystallization medium in a continuous treatment system. This system can synergistically achieve the decomposition and transformation of complexed copper, and the treatment of Cu... 2+ Selective migration and enrichment, polarity reversal release, and in-situ crystallization recovery form "complex copper transformation-Cu". 2+ A closed-loop treatment pathway of "selective enrichment at the membrane interface – reverse release – internal carbonate recycling and crystallization recovery" is employed. This technology can reduce the consumption of external precipitants, lower the post-treatment pressure of copper-containing concentrate, and increase the value of copper resource recovery, providing strong support for the in-depth treatment and resource utilization of wastewater containing complexed copper.