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Sewage treatment method capable of improving nitrogen and phosphorus removal effect of aerobic/idle process

A sewage treatment method and technology for denitrification and phosphorus removal, applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc. Remove the effect of promoting and improving effluent quality

Inactive Publication Date: 2015-04-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Sewage treatment method capable of improving nitrogen and phosphorus removal effect of aerobic/idle process

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Effect test

Embodiment 1

[0019] The system consists of water inlet valve 1, water inlet pipe 2, drain pipe 4, drain valve 3, mud discharge pipe 9, mud discharge valve 8, aeration head 5, flow meter 7, air compressor 6, SBR reactor 10, The stirring device 11 is composed of; wherein: the SBR reactor 10 is equipped with a stirring device 11, the upper part of one side of the SBR reactor 10 is connected to the water inlet pipe 2, the water inlet pipe 2 is provided with a water inlet valve 1, and the middle and lower part of the SBR reactor 10 side is connected to The drain pipe 4 is provided with a drain valve 3, and the bottom of the SBR reactor 10 is connected to the air compressor 6 through the aeration head 5, the flow meter 7 and the pipeline; at the same time, the bottom is connected to the mud discharge pipe 9 through the mud discharge valve 8; The sewage treatment device treats simulated urban domestic sewage. The carbon source is mainly sodium acetate and sodium propionate, ammonium chloride is u...

Embodiment 2

[0028] According to the device and the method described in Example 1, the municipal wastewater of the actual sewage treatment plant was treated. Influent COD is 134~182 mg·L -1 , TN is 28.5~41.2 mg·L -1 , TP is 3.14~6.22mg·L -1 . After stable operation, the results are as follows: the effluent COD is 30~54 mg·L -1 , TN is 4.6~6.3mg·L -1 , TP is 0.11~0.49mg·L -1 , COD, TN, TP removal rate reached 84.7 ± 6.2%, 83.6 ± 5.7%, 94.9 ± 3.8%, respectively.

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Abstract

The invention belongs to the technical field of environmental protection, and specifically relates to a sewage treatment method capable of improving the nitrogen and phosphorus removal effect of an SBR (Sequencing Batch Reactor) aerobic / idle process. Specifically, the sewage treatment method comprises the following steps of: feeding sewage into the sequencing batch reactor, firstly, performing aerobic aeration on the sewage and controlling the concentration of dissolved oxygen in the range from 2 to 3 mg.L<-1>, secondly, performing anoxic stirring, then performing aerobic aeration and controlling the concentration of dissolved oxygen in the range from 4 to 6 mg.L<-1>; settling, draining water and discharging sludge to control the sludge concentration; standing after water draining is finished. The sewage treatment method capable of improving nitrogen and phosphorus removal effect of the SBR aerobic / idle process provided by the invention solves the previous process shortcomings on the basis of the previous aerobic / idle process; the removal rate of total nitrogen is greatly improved, and an certain acceleration effect on the removal of total phosphorus is also achieved; in the meantime, the demand for the dissolved oxygen is reduced and energy consumption is decreased.

Description

technical field [0001] The invention mainly relates to the technical field of environmental protection, in particular to a sewage treatment method for improving the nitrogen and phosphorus removal effect of the aerobic / idle process. Background technique [0002] Excessive discharge of nitrogen and phosphorus elements in sewage (especially domestic sewage) is an important cause of water eutrophication. Eutrophication leads to the deterioration of water quality and makes it difficult to treat drinking water; the concentration of dissolved oxygen in the water decreases due to algae covering the water surface, aquatic organisms will die of hypoxia and suffocation, and the aquaculture industry will reduce or even destroy; in severe cases, it will cause the destruction of the entire ecosystem . Therefore, a stable, reliable and economical method for nitrogen and phosphorus removal is very important to the increasingly serious problem of water eutrophication. [0003] In recent y...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 王冬波陈银广
Owner TONGJI UNIV
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