2results about How to "Carbon saving" patented technology

The application provides a method and system for removing high-concentration complex cyanide in gold extraction wastewater, and relates to the technical field of sewage treatment. The method comprises the following steps: adjusting the pH of the gold extraction wastewater to 8-10 to obtain pretreated wastewater; adding a cobalt ferrite particle catalyst to the pretreated wastewater and introducing ozone to obtain oxidized effluent; dividing the oxidized effluent into solution A and solution B according to the volume ratio, oxidizing solution A under the condition of low dissolved oxygen by using anaerobic ammonia oxidation bacteria, mixing the oxidized solution A with untreated solution B to obtain a mixed solution; and reacting the mixed solution with porous adsorption material and anaerobic ammonia oxidation bacteria, and recycling the cobalt ferrite particle catalyst for circulation. The method used by the application can effectively improve the removal rate of high-concentration complex cyanide, realizes complete mineralization of the complex cyanide, solves the core problem of difficult degradation of the complex cyanide, has strong load resistance, is simple to operate, and has good adaptability.

This invention relates to a high NH4 content + ‑N, high NO3 — -N and high F — The high-efficiency, low-consumption treatment process for photovoltaic wastewater involves initially removing fluoride from the wastewater, which then enters a synergistic short-cut denitrification tank. Through the synergistic effect of heterotrophic short-cut denitrification and sulfur autotrophic short-cut denitrification in the tank, NO3... — -N denitrification reaction controlled at NO2 — This step, involving the addition of nitrogen (N), avoids full-scale denitrification by combining the effluent from short-cut denitrification with high NH4 levels. + -N silane wastewater is mixed in an intermediate tank and then undergoes efficient denitrification via an anaerobic ammonia oxidation (AAO) reactor. The effluent from the AAO reactor enters the MABR (Maintenance-Based Bioreactor) tank. The unique layered structure of the MABR biofilm ensures that nitrification / short-cut nitrification, AAO, and denitrification / short-cut denitrification reactions occur in the same reactor, achieving deep denitrification and removal of residual COD. This process achieves acid-base balance during the biochemical reactions, saving 100% of the acid and alkali dosage. Sludge production is only 10% of that of traditional denitrification processes under the same load, significantly reducing operating costs.