Denitrified biological denitrificaion equipment of intensified internal source, and method

An endogenous denitrification and biological denitrification technology, applied in aerobic and anaerobic processes, can solve the problems of high sludge production and low denitrification efficiency, achieve low sludge production, improve denitrification efficiency, The effect of saving infrastructure costs

Active Publication Date: 2007-07-25
CHONGQING KANGDA ENVIRONMENTAL PROTECTION IND GRP
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Problems solved by technology

[0006] The purpose of this invention is to improve the denitrification efficiency of the sewage treatment process, reduce the sludge production, reduce the operation and construction costs, sol

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  • Denitrified biological denitrificaion equipment of intensified internal source, and method
  • Denitrified biological denitrificaion equipment of intensified internal source, and method

Examples

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experiment example 1

[0037] Experimental Example 1: Taking the actual domestic sewage discharged from a family area of ​​a university as the raw water, the influent flow rate is 6L / h, the COD of the influent water=221~413mg / L, NH 4 -N=36~67mg / L. The experiments were carried out at room temperature (23-25°C). The running results show that: the experimental raw water BOD 5 / COD is 0.51, the BOD of hydrolysis acidification effluent 5 / COD increased to 0.74, and the biodegradability of sewage was greatly improved. System effluent NH 4 -N concentration below 2mg / L, NH 4 -The average removal rate of N exceeds 95%, the system effluent TN is less than 15mg / L, the average TN removal rate exceeds 74%, the system effluent COD is less than 30mg / L, the average COD removal rate exceeds 90%, and the apparent yield of sludge in the aerobic pool The coefficient is 0.23, which is 0.3-0.5 lower than that of the traditional sewage treatment process. After the sludge is hydrolyzed and acidified, the sludge volume...

experiment example 2

[0038] Experimental example 2: Taking the actual domestic sewage discharged from a family area of ​​a university as the object, by adding beer and NH 4 Cl adjusts influent COD and NH 4 -N concentration. The influent flow rate is 8L / h, the COD and NH in the influent 4 -N, (COD=600~800mg / L, NH 4 -N=82~103 mg / L). The experiments were carried out at room temperature (23-25°C). The running results show that: the experimental raw water BOD 5 / COD is 0.43, the BOD of hydrolytic acidification effluent 5 / COD increased to 0.68, and the biodegradability of sewage was greatly improved. System effluent NH 4 -N concentration below 5mg / L, NH 4 -The average removal rate of N exceeds 93%, the system effluent TN is less than 30mg / L, the average TN removal rate exceeds 72%, the system effluent COD is less than 30mg / L, the average COD removal rate exceeds 95%, and the apparent yield of sludge in the aerobic pool The coefficient is 0.25, which is 0.3-0.5 lower than that of the traditiona...

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Abstract

This invention discloses apparatus and method for biological denitrification of wastewater by reinforced inner source reverse nitrification. The method solves the problem of low denitrification efficiency, high operation energy consumption, large floor area, and high sludge productivity faced by present wastewater treatment techniques. The method comprises: introducing wastewater from inlet pipe into grid and sand-settlement pool for treatment, mixing with returned sludge from the precipitation pool, and sending into a hydrolysis and acidification pool to reduce sludge and raise wastewater biochemical capacity. The hydrolysis and acidification liquid is used as the carbon source for anaerobic pool denitrification to reinforce the inner source reverse nitrification process in the anaerobic pool. Organic matters in wastewater are completely removed in the aerobic pool, and ammonia and nitrogen are completely converted into nitrate nitrogen by nitrobacteria. Sludge and water are separated in the precipitation pool, the supernatant is discharged via the outlet pipe, and residual sludge is returned to the hydrolysis and acidification pool. The whole system discharges sludge from the hydrolysis and acidification pool. This invention has such advantages as low energy consumption, high efficiency, low investment.

Description

technical field [0001] The invention relates to a sewage treatment device and its method, in particular to a device and its method for biological denitrification. Background technique [0002] With the rapid development of my country's economy, the contradiction between supply and demand of water resources is becoming more and more intensified. However, the existing sewage treatment plants in my country have a low and unstable removal rate of nitrogen, the main nutrient that causes water eutrophication, which leads to the aggravation of water eutrophication. Therefore, the research and development of efficient and economical biological denitrification process has become a current hot spot. In the denitrification treatment process of sewage, the biological method has become an important method for denitrification treatment of urban sewage in recent years due to its simple process, strong treatment capacity and flexible operation mode, and has been widely used. According to ...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 彭永臻王建龙王淑莹
Owner CHONGQING KANGDA ENVIRONMENTAL PROTECTION IND GRP
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