A method for returning aerobic effluent to an anaerobic reactor for dilution and anaerobic ammonium oxidation for treating gas wastewater

Abstract

The invention relates to a gas wastewater treatment method characterized by returning aerobiotic effluent to an anaerobic reactor to be diluted and subjected to anaerobic ammonia oxidation. In the method, an anaerobic reactor, a hydrolytic acidification reactor, an aerobiotic reactor, an oxygen-deficiency reactor are used. Water the quantity of which is fQ enters the hydrolytic acidification reactor directly, wherein Qf means that the total quantity (Q) of raw wastewater is multiplied by a distribution factor (f); the rest raw wastewater the quantity of which is (1-fQ) and water which returns from the aerobiotic reactor and the quantity of which is RQ enter the anaerobic reactor; ammonia nitrogen entering the hydrolytic acidification reactor is divided; after entering the aerobiotic reactor, the wastewater can generate nitrate nitrogen and nitrite nitrogen under the action of aerobiotic nitrifying bacteria; and effluent from the aerobiotic reactor returns to the anaerobic reactor and is reduced into nitrogen gas by using ammonia nitrogen under the action of anaerobic ammonium oxidation bacteria. The method is characterized in that the effluent from the aerobiotic reactor returns to the anaerobic reactor at a reflux ratio R of 0-100%. The method is scientific and reasonable, is simple in flow, low in operation cost, capable of fully degrading organics in the wastewater, good in water treatment effect and can be popularized and applied conveniently.

Description

technical field [0001] The invention relates to the technical field of sewage and wastewater treatment, and relates to a method for returning aerobic effluent to an anaerobic reactor for dilution and anaerobic ammonium oxidation treatment of gas wastewater. Background technique [0002] The new coal chemical technology is a clean utilization technology of coal. It takes coal gasification as the leader and carbonization technology as the basis to synthesize and produce various chemical products and fuel oil. The wastewater discharged mainly comes from processes such as coal coking, gas purification and chemical product recovery and refining. Coal chemical wastewater has complex components, high ammonia and high phenol, high chroma and toxicity, and poor biodegradability. At the same time, coal chemical wastewater also contains a lot of organic matter with chromophores and auxochromes, which makes coal chemical wastewater have the characteristics of high chroma and turbidity....

AI Technical Summary

Problems solved by technology

The feature of this process is to stably control the nitrification process in the nitrosation stage, with NO 2 — —N is the end product of nitrification, compared with the traditional nitrification-denitrification process, it can save 25% of oxygen supply and 40% of methanol (external carbon source), but in the SHARON process, it is also necessary to carry out the nitrification reactor At the same time, the nitrosating bacteria are autotrophic bacteria. When the concentration of organic matter in the nitrification reactor water is too high, the heterotrophic bacteria with a high proliferation rate will proliferate rapidly, so that the autotrophic nitrosating bacteria can be obtained. If there is no advantage, it cannot become a dominant genus, and the nitrosation reaction will eventually fail to proceed

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