Method and device for realizing partial shortcut nitrification and anaerobic ammonia oxidation of municipal sewage by sludge fermentation

Abstract

A method and a device for realizing partial shortcut nitrification and anaerobic ammonia oxidation of municipal sewage by sludge fermentation belong to the field of municipal sewage treatment and sewage biological treatment. In a first SBR of a reactor, organics and phosphorus are removed, partial shortcut nitrification and denitrification actions are taken, and phosphorus is removed through real-time DO and pH control and sludge discharge. Effluent of the first SBR of the reactor enters a second SBR of the reactor for anaerobic ammonia oxidation reaction, so that the purpose of deep nitrogen and phosphorus removal is achieved. As residual sludge and domestic wastewater are mixed for treatment, the problem that shortcut nitrification of domestic wastewater cannot be stably realized due to low ammonia concentration can be solved, carbon sources are saved, the nitrogen and phosphorus removal efficiency is improved, and meanwhile, the sludge reduction treatment is realized.

Description

technical field [0001] The invention relates to a method and device optimization control for realizing partial short-range nitrification and anaerobic ammonium oxidation of urban sewage by using fermented sludge, and belongs to the fields of urban sewage treatment and sludge biochemical treatment. This process is suitable for the enhanced deep nitrogen and phosphorus removal of low C / N, C / P urban domestic sewage. Background technique [0002] In the process of biological nitrogen removal, denitrifying bacteria, as heterotrophic bacteria, need organic matter as electron donors to reduce oxidized nitrogen; in the process of biological phosphorus removal, phosphorus accumulating bacteria absorb short-chain fatty acids VFA in the anaerobic stage to synthesize PHA and store them in the cells , Decompose PHA in the aerobic section as the energy required for excess phosphorus uptake. Therefore, organic carbon sources are very important for biological nitrogen and phosphorus remova...

AI Technical Summary

Problems solved by technology

However, most urban sewage in my country generally has a serious shortage of carbon sources, and its own carbon sources cannot meet the requirements of nitrogen and phosphorus removal, making it difficult for the effluent to meet the standards

Although good water effluent effect can be achieved by adding methanol, sodium acetate and other external carbon sources, the cost is too high, and it will also increase the output of residual sludge

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