Sewage treatment device for secondary circulation and application method thereof

A sewage treatment device and secondary circulation technology, which is applied in the field of sewage treatment, can solve the problems of inapplicable activated sludge treatment methods, etc., and achieve the effects of improving the possibility of short-range denitrification, improving the denitrification capacity, and improving the biochemical reaction.

Active Publication Date: 2014-03-05
HAIYUAN ENVIRONMENTAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese patent that the patent publication number is 101891344A, the Chinese patent that the patent publication number is 101560038, and the Chinese patent that the patent publication number is 1887739 all disclose a sewage treatment device for activated sludge and biofilm to jointly treat sewage, but the The biofilms are fixed and cannot be applied to the joint treatment of sewage by activated sludge and moving bed biofilms

Method used

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  • Sewage treatment device for secondary circulation and application method thereof

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Embodiment 1

[0026] See figure 1 , a sewage treatment device for secondary circulation, comprising an aerobic pool 1, an anoxic pool 2, a water inlet pipe 3, and a water outlet pipe 4, the water inlet pipe 3 is connected to the anoxic pool 2, the water outlet pipe 4 is connected to the aerobic pool 1, and the aerobic pool is connected to the aerobic pool 1. The pool 1 is set around the anoxic pool 2, and the effective volume of the aerobic pool 1 is 2.5 times the effective volume of the anoxic pool 2 (it can also be 2 times, 3 times or other values ​​in 2-3 times), the The ratio is a relatively suitable volume ratio of the aerobic pool 1 and the anoxic pool 2, and the efficiency of sewage treatment is relatively high. The anoxic tank 2 is provided with a stirring device 22; the nozzle of the outlet pipe 4 is provided with a screen 7, and the anoxic tank 2 is provided with a sludge return pipe 21, and the height of the nozzle of the sludge return pipe 21 is higher than that of the water inl...

Embodiment 2

[0032] A method of using the above-mentioned secondary circulation sewage treatment device: inject sewage into the anoxic pool 2 through the water inlet pipe 3, inject activated sludge into the anoxic pool 2 through the sludge return pipe 21, and use the circulating liquid channel 6 to The anoxic pool 2 obtains the nitrification liquid from the aerobic pool 1, and the three denitrification and denitrification are carried out in rounds. The stirring device 22 stirs the mixed sewage to make it flow from the return channel 9 of the anoxic pool 2 to the aerobic pool 1, forming the sewage The first cycle: the aerobic pool 1 is added with a suspension carrier 10 made of a cylindrical polyethylene filler with a diameter of 9mm-11mm and a height of 9mm-11mm with a biofilm, and the density of this material is 0.98g / cm 3 , can be fully mixed with sewage without floating on the water surface or sinking to the bottom, and the suspension carrier 10 made of this material has a high surface a...

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Abstract

The invention discloses a sewage treatment device for secondary circulation and an application method of the sewage treatment device, belongs to the technical field of sewage treatment, and provides a device for commonly treating sewage by active sludge and a moving bed biological membrane for the secondary circulation and an application method of the device. The sewage treatment device for the secondary circulation comprises an aerobic tank, an oxygen-poor tank, a water inlet pipe, a water outlet pipe, a circulating liquid hole channel, a reflowing hole channel, a flow guide plate, an aeration device, an agitating device, a screening net, a sludge reflowing device and the like. The application method of the sewage treatment device fort the secondary circulation comprises the following steps: first circulation of the sewage is formed between the aerobic tank and the oxygen-poor tank by the circulating liquid hole channel, the reflowing hole channel and the agitating device; a suspended carrier with the biological membrane is added into the aerobic tank and is used as the moving bed biological membrane to be mixed with the sewage; second circulation of the sewage is formed by flowing the sewage in the aerobic tank through the aeration device. The device and the application method have the advantages of sewage treatment by an active sludge method and a moving bed biological membrane method.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a secondary circulation sewage treatment device and a method for using the same. Background technique [0002] At present, due to the complex water quality of the combined urban pipeline sewage, there are relatively severe organic matter degradation and nitrogen removal pressures; in addition, the inflow of some industrial wastewater (industrial wastewater treatment liquid) also brings large-scale fluctuations in the quality and quantity of sewage water, impacting biochemical treatment system, which affects the stability of sewage treatment; the above-mentioned problems have exacerbated the difficulty of urban sewage plants to meet the standard treatment, which will destroy the ecological balance of the receiving water body and lead to the rapid deterioration of the surrounding environment. [0003] Using activated sludge method and biofilm method to treat urban sewage i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 刘良军万先凯乐翠华
Owner HAIYUAN ENVIRONMENTAL SCI & TECH
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