UASB anaerobic ammonium oxidation treatment method and device for nitrogen-containing wastewater

Abstract

The invention relates to a UASB anaerobic ammonium oxidation treatment method and device for nitrogen-containing wastewater, which is characterized in that it comprises the following steps: (1) Adding common anaerobic sludge as inoculation sludge to an upflow anaerobic UASB reactor Medium; (2) A certain amount of organic matter was added to the high-nitrogen and low-carbon wastewater as the influent of the anaerobic UASB reactor; the concentration of NO2‑‑N in the distribution water was 690 mg / L, and the concentration of NH4+‑N was 250 mg / L (3) The anaerobic UASB reactor was operated continuously for 30 days under constant temperature of 25-35°C and pH 7.5-8.0. (4) After 30 days of cultivation, the concentration of ammonia nitrogen in the influent was increased to 600-900mg / L , continue to run for 50-60 days, (5) After 50-60 days of cultivation, adjust the concentration of ammonia nitrogen in the influent to a low concentration, and continue to run for 110-120 days to obtain low-concentration wastewater. Anammox bacteria in the reactor have been enriched to a greater extent. In addition, an average of 84.7% of COD was also removed while anammox was being carried out.

Description

technical field [0001] The invention belongs to the technical field of biological treatment, and in particular relates to a UASB anaerobic ammonium oxidation treatment method and device for nitrogen-containing wastewater. Background technique [0002] Water is the basis for the sustainable development of society and economy. With the acceleration of industrialization in our country, the natural environment, especially the water environment, has been seriously damaged, and the quality of water environment in rivers, lakes and reservoirs is deteriorating day by day. Since the 1980s, the country has accelerated the pace of water environment management, and the sewage treatment rate has been greatly improved. However, the problem of eutrophication in slow-flowing water bodies in my country has not only not been resolved, but has become increasingly serious. [0003] As the degree of eutrophication of water body becomes more and more serious, domestic and foreign countries begin ...

AI Technical Summary

Problems solved by technology

However, the disadvantage of the top water inlet is that the water inlet power is small, the agitation of the sludge at the bottom of the pool is small, and it is easy to form a short flow, resulting in a decrease in the effective volume of the UASB, which greatly affects the volume load.

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