The method of whole-process nitrification-sludge fermentation coupled with short-range denitrification/ANAMMOX biofilm process to treat high-ammonia nitrogen wastewater

Abstract

The invention relates to a method for treating high-ammonia-nitrogen wastewater by coupling short-range denitrification / anammox biofilm process with whole-process nitrification--sludge fermentation, and belongs to the field of sewage sludge treatment. The device includes: raw water tank, complete nitrification reactor (CNR), intermediate tank, sludge storage tank, sludge fermentation coupled with short-range denitrification / anammox biofilm reactor (SFPDA‑BR) and automatic control system. The sludge fermentation coupled short-range denitrification / anammox biofilm reactor is equipped with packing balls, three-phase separators and other devices. The method is: NH 4 + The high ammonia nitrogen wastewater with a ‑N concentration of 200‑400mg / L first enters the CNR from the raw water tank for the whole process of nitrification reaction, the water from the CNR enters the intermediate pool, and the sludge from the CNR enters the mud storage tank. Input SFPDA‑BR to simultaneously carry out sludge fermentation, short-range denitrification and anammox denitrification. The invention is suitable for advanced treatment of high-ammonia-nitrogen wastewater, and the denitrification process does not need to add an external carbon source, and finally realizes the purpose of carbon source development in the sludge, short-range denitrification and anaerobic ammonium oxidation coupling.

Description

technical field [0001] The invention relates to a method for treating high-ammonia-nitrogen wastewater with a short-range denitrification / anammox biofilm process coupled with whole-process nitrification-sludge fermentation, and belongs to the field of biological treatment of sewage sludge. This technology is suitable for the enhanced biological denitrification treatment of high ammonia nitrogen wastewater with low carbon-to-nitrogen ratio (C / N≤5) and the reduction of excess sludge. Background technique [0002] Many high ammonia nitrogen concentrations (NH 4 + -N concentration is 200-400mg / L) waste water, there is the problem of insufficient carbon source, thus can't meet the demand of denitrification. Existing sewage biological treatment systems usually supplement organic matter by adding external carbon sources, which not only increases treatment costs, but also exacerbates CO in water plants. 2 Emissions and generation of excess sludge. The treatment of a large amount...

AI Technical Summary

Problems solved by technology

However, the slow growth of anammox bacteria, the difficulty of enrichment, and the long start-up time of the process limit the application of the anammox process.

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