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Device and method for rapid short-cut denitrification treatment of sewage

A short-range denitrification and sewage technology

Pending Publication Date: 2021-10-22
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, in the actual process, in order to improve the efficiency of denitrification, sewage treatment plants usually increase the C / N by adding external carbon sources to ensure that nitrate is completely reduced to nitrogen. The disadvantage is that it increases the energy consumption and Costs, resulting in energy waste, but also produce a large amount of surplus sludge

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  • Device and method for rapid short-cut denitrification treatment of sewage

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Experimental program
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Effect test

Embodiment 1

[0023] The device for rapid short-range denitrification treatment of sewage described in this embodiment is as follows: figure 1 As shown, it includes urban sewage raw water tank 1, nitrate water distribution tank 2, continuous flow short-path denitrification SBBR reactor 3, effluent water tank 4, online monitoring feedback control system 5; the left upper end of urban sewage raw water tank 1 is provided with a first The overflow pipe 1.1 is provided with a first vent pipe 1.2 at the lower end on the right side, and the urban sewage raw water tank 1 is connected with the continuous flow short-path denitrification SBBR reactor 3 through the first water inlet pump 3.1; the upper left end of the nitrate distribution tank 2 A second overflow pipe 2.1 is provided, and a second vent pipe 2.2 is provided at the lower end on the right side. The nitrate water distribution tank 2 is connected to the continuous flow short-path denitrification SBBR reactor 3 through the second water inlet ...

Embodiment 2

[0032] In this embodiment, the PDA-SBBR reactor 3 is used to replace the continuous flow short-path denitrification SBBR reactor 3, and other structures are the same as in Embodiment 1. The urban domestic sewage is taken from a sewage treatment plant domestic sewage, and the specific water quality is as follows: the COD concentration is 75 ~ 300mg / L, NH 4 + -N concentration is 55~90mg / L, NO 2 - -N concentration 3 - - N concentration figure 1 As shown, the nitrate water is the water containing only sodium nitrate, NO 3 - -N concentration is 70-120mg / L. PDA-SBBR reactor 3 is made of plexiglass, with an effective volume of 6L. The specific sewage treatment process is as follows:

[0033] (1) System startup:

[0034] The short-range denitrification sludge with good nitrite accumulation performance was added to PDA-SBBR reactor 3, and the sludge with good anaerobic ammonium oxidation performance was added to PDA-SBBR reactor 3, so that the PDA-SBBR after inoculation The con...

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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 rapid short-cut denitrification treatment of sewage. According to the invention, municipal sewage is continuously fed into a continuous flow short-cut denitrification SBBR (sequencing batch biofilm reactor) from a municipal sewage raw water tank, and nitrate distribution water is continuously fed into the continuous flow short-cut denitrification SBBR from a nitrate distribution water tank; C / N is adjusted by controlling a water inlet proportion, and hydraulic retention time is adjusted by controlling the total water inlet flow, so the nitrite accumulation rate of a biological membrane is increased, the short-cut denitrification capacity of the biological membrane is optimized, and the purpose of rapidly obtaining the biological membrane with the short-cut denitrification capacity is achieved; and after the reaction of the sewage in the continuous flow short-cut denitrification SBBR is finished, the sewage enters a right-side non-turbulent-flow settling zone to be drained, and effluent is drained into an effluent tank through an electric drain valve. The device and the method are simple in structure and process flow, easy to operate, low in energy consumption, free of greenhouse gas and friendly to environment, and can be used for quickly culturing a short-cut denitrification biological membrane for low-C / N urban sewage and treating the sewage.

Description

Technical field: [0001] The invention belongs to the technical field of sewage biological treatment, and relates to a device and method for rapid short-range denitrification treatment of sewage. Background technique: [0002] In recent years, the phenomenon of eutrophication in my country's water bodies is still relatively serious, among which nitrogen and phosphorus are one of the main pollution factors, and the removal of nitrogen and phosphorus from sewage has become a hot research topic for experts and scholars at home and abroad. However, in the actual application process of the traditional biological nitrogen and phosphorus removal process, there are often problems such as high energy consumption, high oxygen consumption, complex process, low efficiency of nitrogen and phosphorus removal, and high operating costs. Denitrification refers to the biochemical reaction process in which nitrate is gradually reduced to nitrogen under the action of microorganisms. The reaction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F101/10C02F101/16C02F101/30
CPCC02F3/28C02F2101/16C02F2101/30C02F2101/166C02F2101/105
Inventor 赵骥张鑫诚王晓霞于德爽
Owner QINGDAO UNIV
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