Device and method for advanced treatment of sludge anaerobic digestion liquid and municipal sewage by shortcut nitrification combined with multi-stage influent denitrification ammonia oxidation process

Abstract

The invention discloses a device and a method for advanced treatment of sludge anaerobic digestion liquid and municipal sewage by a shortcut nitrification combined multi-stage influent denitrificationammonia oxidation process, belonging to the field of sewage biological treatment. The device adopts a sequencing batch reactor (SBR) and an upflow anaerobic sludge bed (UASB) reactor to operate jointly. The sequencing batch SBR is used to carry out short-cut nitrification of the sludge anaerobic digestion liquid. Effluent enters the UASB reactor from the bottom. The reactor is divided into an anaerobic ammonia oxidation zone, an intermediate mixing zone and a short-cut denitrification coupled anaerobic ammonia oxidation zone from bottom to top. The municipal sewage enters the UASB reactor from a middle water inlet, and the short-range denitrification reaction uses an organic carbon source in the municipal sewage to reduce nitrate generated in the anaerobic ammonia oxidation process to nitrite, and the nitrite and ammonia nitrogen in the municipal sewage are removed through the anaerobic ammonia oxidation, thus realizing synchronous and efficient treatment of the sludge anaerobic digestion liquid and the municipal sewage. The method has the advantages of high denitrification efficiency, saving aeration energy consumption and reducing organic carbon source consumption.

Description

technical field [0001] The invention relates to a device and method for short-range nitrification combined with multi-stage influent continuous flow short-range denitrification coupling anaerobic ammonium oxidation process for treating sludge anaerobic digestion liquid and urban sewage, belonging to the technical field of biological denitrification of wastewater, and specifically adopts a sequence batch method The SBR reactor is used for short-cut nitrification of sludge anaerobic digestion liquid. The multi-stage continuous flow short-cut denitrification coupling anaerobic ammonium oxidation UASB reactor is used, which is divided into anaerobic ammonium oxidation reaction zone, middle mixing zone from bottom to top. zone, short-range denitrification coupling anammox reaction zone, ammonia nitrogen and nitrite in the effluent of sludge anaerobic digestion liquid are removed in the anaerobic ammonium oxidation reaction zone and nitrate is produced, and urban sewage and nitrate a...

AI Technical Summary

Problems solved by technology

However, the production of nitrate nitrogen in this process often leads to a high concentration of total nitrogen in the effluent, which cannot be discharged directly and requires further denitrification treatment

The traditional denitrification method needs to consume a large amount of additional carbon sources and increase the output of excess sludge. Setting up a separate denitrification unit increases the complexity of the process operation

At present, there is no effective process and method for deep denitrification of sludge digestion liquid, which is economical and efficient

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