Method for adding residual sludge anaerobic fermentation liquor of reinforced municipal sewage SBR

Abstract

The invention discloses a method for adding residual sludge anaerobic fermentation liquor of reinforced municipal sewage SBR. Each operation cycle of the SBR reactor comprises anaerobic water inlet stirring, aeration stirring (aerobic I section), anoxic sludge fermentation liquid inlet stirring (anoxic I section), aeration stirring (aerobic II section), anoxic sludge fermentation liquid inlet stirring (anoxic II section), aeration stirring (aerobic III section), standing and drainage operation. Through on-line monitoring of pH, ORP, ammonia nitrogen, COD and NO3<-> in the municipal sewage SBR, COD and ammonia nitrogen components in the fermentation liquor can be inversely calculated, the addition amount of the fermentation liquor is optimized, and it is guaranteed that the total nitrogen of effluent reaches the standard. The carbon source adding cost for nitrogen and phosphorus removal of urban sewage can be reduced, the effluent quality is ensured, and the recycling potential of sludge fermentation liquor is improved.

Description

technical field [0001] The invention relates to a method for adding excess sludge anaerobic fermentation liquid to a strengthened municipal sewage SBR reactor, which mainly deals with poor total nitrogen removal effect or excessive dosing caused by unstable components of excess sludge anaerobic fermentation liquid The problem of secondary pollution belongs to the technical field of sewage treatment and sludge resource utilization. Background technique [0002] In recent years, frequent incidents of water pollution and eutrophication have caused huge social and economic losses in our country, and one of the culprits is excessive discharge of nitrogen. Due to the low carbon and nitrogen of municipal sewage, the lack of organic matter itself affects the denitrification efficiency, and it is difficult to discharge up to the standard. In practical applications, it is often necessary to add sodium acetate, methanol, etc. as external carbon sources to achieve denitrification effec...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems in the prior art that the addition of excess sludge anaerobic fermentation liquid cannot be dynamically adjusted according to the influent water quality and the components of the excess sludge anaerobic fermentation liquid, resulting in insufficient or wasteful carbon sources, and provides a A method for adding excess sludge anaerobic fermentation liquid to strengthen municipal sewage SBR reactor

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