Process for treating sewage by aeration tank

An aeration tank and sewage technology, which is applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of polluting the environment and water environment, aggravating the shortage of water resources, etc.

Inactive Publication Date: 2017-05-10
DUJIANGYAN EMPRESS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A large amount of sewage is discharged without treatment or without effective treatment. As a result, on the one hand, it pollutes the environment, especially the water environment, and on the other hand, it exacerbates the shortage of water resources.

Method used

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  • Process for treating sewage by aeration tank

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Embodiment Construction

[0007] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0008] After the sewage passes through the grid 6 and the grit chamber 5, it enters the primary sedimentation tank 4 for preliminary settlement, and the effluent enters the first aeration tank 1 from the bottom to degrade BOD and COD and oxidize part of ammonia nitrogen; after the upward flow flows out, Enter the second aeration tank 2 from the bottom to degrade the remaining BOD and COD and completely oxidize ammonia nitrogen; then enter the third aeration tank 3 from the bottom, and the effluent from the third aeration tank flows back to the first aeration tank for Denitrification, while adding chemical phosphorus removal agent in the third aeration tank. By adding additional carbon sources (such as methanol, etc.) and chemical phosphorus removal agents (such as FeCl3, etc.) at the water inlet, denitrification and chemical phosphorus removal are carried out...

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Abstract

The invention relates to a device for treating sewage by an aeration tank. The device comprises a grille, a grit chamber and a primary settling tank, and is characterized by also comprising a first aeration tank, a second aeration tank and a third aeration tank, wherein the first aeration tank, the second aeration tank and the third aeration tank are sequentially connected; the bottoms of the three aeration tanks are connected; a reverse flushing water outlet buffer tank is arranged; sludge in the buffer tank flows back to the primary settling tank; sewage in the third aeration tank flows back to the first aeration tank to perform denitrification; final sewage treated by the third aeration tank is discharged out through a reverse flushing storage tank. The device provided by the invention has the advantages that in the device, through the self interception effect of the filling material per se and the bioflocculation effects of surface biomembranes, the outlet water SS is very low and does not exceeds 10mg / L generally; due to the periodical reverse flushing, the biomembranes can be effectively updated; for specific performance, the biomembranes are thinner; the activity is higher.

Description

technical field [0001] The invention relates to a sewage treatment process, in particular to a sewage treatment process using an aeration tank. Background technique [0002] my country is a country that lacks water resources. In recent years, the phenomenon of water shortage in many areas has gradually aggravated. At the same time, the discharge of sewage (waste) water in my country is increasing year by year. Taking 1997 as an example, the total discharge of sewage (waste) water was 41.6 billion m 3 , The discharge of chemical oxygen demand (CODCr) in sewage is 17.57 million tons, while the centralized treatment rate is only about 10%. A large amount of sewage is discharged without treatment or without effective treatment. As a result, on the one hand, it pollutes the environment, especially the water environment, and on the other hand, it exacerbates the shortage of water resources. It can be said that capital and technology have become the two main factors restricting m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 吴强
Owner DUJIANGYAN EMPRESS TECH CO LTD
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