Device and method for simultaneously realizing urban sewage treatment and excess sludge reduction

A technology for urban sewage and excess sludge, applied in biological water/sewage treatment, water/sludge/sewage treatment, biological sludge treatment, etc., can solve the problem of inability to remove ammonia nitrogen, reduce consumption and solve excess sludge The effect of large output and solving the shortage of carbon source for denitrification

Pending Publication Date: 2021-10-22
QINGDAO UNIV
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Problems solved by technology

However, the ammonia nitrogen produced cannot be removed only by sludge fermentation

Method used

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  • Device and method for simultaneously realizing urban sewage treatment and excess sludge reduction

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Embodiment

[0026] The structure of the device that realizes urban sewage treatment and excess sludge reduction at the same time as described in this example is as follows: figure 1 As shown, the process of synchronous short-range denitrification and anaerobic ammonium oxidation treatment of urban sewage by sludge fermentation and reduction of excess sludge, including urban sewage raw water tank 1, full nitrification SBR reactor 2, first intermediate tank 3, sludge Tank 4, sludge fermentation and short-range denitrification integrated SFPD reactor 5, sludge storage tank 6, second intermediate water tank 7, anaerobic ammonium oxidation UASB reactor 8 and effluent water tank 9; urban sewage raw water tank 1 passes through the first inlet The water pump 2.1 is connected with the whole nitrification SBR reactor 2; the air pump 2.6 is connected with the whole nitrification SBR reactor 2; the whole nitrification SBR reactor 2 is connected with the first intermediate water tank 3 through the firs...

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Abstract

The invention belongs to the technical field of biological sewage treatment, and relates to a device and a method for simultaneously realizing urban sewage treatment and excess sludge reduction. According to the invention, sludge fermentation is combined with short-cut denitrification and anaerobic ammonia oxidation, short-cut denitrification is used for reducing nitrate nitrogen into nitrite nitrogen by using short-chain fatty acid generated by sludge fermentation, and ammonia nitrogen generated by fermentation is used as a reaction substrate of anaerobic ammonia oxidation for deep denitrification; and thus, efficient, energy-saving and stable denitrification is carried out on urban sewage under the condition that no additional carbon source is added, organic matters in the sludge are recycled, and the sludge is reduced.

Description

Technical field: [0001] The invention belongs to the technical field of sewage biological treatment, and relates to a device and method for realizing urban sewage treatment and excess sludge reduction at the same time, using sludge fermentation synchronous short-range denitrification and anaerobic ammonium oxidation to treat urban sewage and realize excess sludge reduction quantity. Background technique: [0002] With the acceleration of urbanization and the continuous increase of urban population, the amount of urban sewage discharge is increasing year by year. According to statistics, as of the end of January 2020, the number of sewage treatment plants in my country has reached more than 10,000, and the sewage treatment capacity in 2019 increased by 180 million tons per day compared with 2018. During the operation of the sewage treatment process, part of the sludge produced by the process is refluxed as the reactant of the biological reaction, while the remaining sludge i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F11/04C02F101/16
CPCC02F3/302C02F11/04C02F2101/16C02F2303/06
Inventor 王晓霞李天琦赵骥于德爽
Owner QINGDAO UNIV
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