Method for treating sewage by using anaerobic membrane bioreactor to remove sulphur and nitrogen

An anaerobic reactor and anaerobic membrane biological technology, applied in the field of sewage treatment, can solve the problems of poor system impact resistance, low sludge concentration, long acclimation time, etc., and achieve increased stability, impact resistance, and energy consumption level. The effect of reduction and footprint reduction

Inactive Publication Date: 2014-02-19
LG ELECTRONICS CHINA RANDD CENT SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] The main purpose of the present invention is to provide a method for synchronous removal of nitrogen and sulfur pollution in sewage by using a membrane bioreactor, to improve or overcome one or more defects in the prior art, especially to solve the problem of traditional nitrogen and sulfur removal The complex technological process, high treatment cost, and low treatment efficiency caused by separate treatment, as well as solving the problems of low sludge concentration, long domestication time, low total nitrogen and total sulfur removal load, and system durability in the current synchronous denitrification and sulfur removal reactor Problems such as poor impact

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  • Method for treating sewage by using anaerobic membrane bioreactor to remove sulphur and nitrogen
  • Method for treating sewage by using anaerobic membrane bioreactor to remove sulphur and nitrogen
  • Method for treating sewage by using anaerobic membrane bioreactor to remove sulphur and nitrogen

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Embodiment 1

[0071] Embodiment 1, external type internal circulation aerated anaerobic membrane bioreactor

[0072] Such as image 3 As shown, it is a schematic structural diagram of a preferred embodiment of the sewage treatment equipment of the present invention. The sewage treatment equipment of the present embodiment comprises:

[0073] Water inlet tank 1, water inlet pump 2, anaerobic reactor 3, membrane module 4 and its supporting equipment (such as closed membrane tank 4-1), outlet pump 5, distributor 6, gas storage tank 7, pressure valve 8, span Membrane differential pressure probe 9, sensor 10, circulation pump 11, gas flow meter 13, agitator 14, gas circulation pump 15, absorption tower 16.

[0074] Wherein, the sewage in the water inlet pool 1 is pumped into the anaerobic reactor 3 by the water inlet pump 2, and the upper air-gathering space of the anaerobic reactor 3 communicates with the distributor 6 arranged under the membrane module 4 through an air supply pipeline. A ga...

Embodiment 2

[0085] Embodiment 2, built-in internal circulation aerated anaerobic membrane bioreactor

[0086] Such as Figure 4 As shown, in this embodiment, the sewage treatment equipment adopts a built-in membrane module internal circulation aerated anaerobic membrane bioreactor, wherein the membrane module 4 is arranged inside the anaerobic reactor 3, that is, a built-in membrane module is used. Corresponding to this feature, there is no need to set the liquid internal circulation passage in Embodiment 1 in this embodiment, and the gas internal circulation passage only needs to be provided with a gas supply pipeline connecting the anaerobic reactor and the distributor below the membrane module. Yes, without setting the return air line in Embodiment 1.

[0087] In addition to the advantages described in Example 1, this example, due to the design of its built-in membrane module, enables the internal circulation aeration to simultaneously achieve effective membrane cleaning, water inflow...

Embodiment 3

[0090] Embodiment 3, external type internal circulation jet aeration anaerobic membrane bioreactor

[0091] Such as Figure 5 As shown, the sewage treatment equipment of this embodiment adopts an anaerobic membrane bioreactor with external membrane modules and internal circulation jet aeration, wherein the sewage in the inlet pool 1 is pumped into the anaerobic reactor 3 by the inlet pump 2, and the anaerobic reaction The upper gas-gathering space of the device 3 communicates with the gas-liquid mixed flow distributor 6 located below the membrane module 4 through a jet aeration pipeline. In this embodiment, the delivery of nitrogen is realized by jet flow. The airtight The air outlet on the upper part of the membrane pool 4-1 communicates with the upper gas collection space of the anaerobic reactor 3 through a gas return pipeline, and an absorption tower 16 is arranged on the gas return pipeline.

[0092] Specifically, the solid-liquid mixture in the anaerobic reactor 3 is pu...

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Abstract

The invention provides a method for treating sewage by using an anaerobic membrane bioreactor to remove sulphur and nitrogen. The method comprises the steps that the anaerobic reactor containing activated sludge of thiobacillus denitrificans is provided, the to-be-treated sewage containing nitrate and / or nitrite and sulfide is led into the anaerobic reactor to be in contact with the thiobacillus denitrificans, the thiobacillus denitrificans takes the nitrate as an electron acceptor to oxidize the sulfide in the wastewater into elemental sulfur and reduce the nitrate and / or nitrite into nitrogen to remove the nitrate and / or nitrite at the same time, the sewage is further in contact with a separation membrane in a membrane component after the nitrate and / or nitrite and sulfide are removed through the thiobacillus denitrificans, the separation membrane stops most of the thiobacillus denitrificans and other suspension particles, the stopped thiobacillus denitrificans and other suspension particles are kept in the reactor or returned to the reactor, and a filtered liquid is the treated water body. According to the method for treating sewage by using the anaerobic membrane bioreactor to remove sulphur and nitrogen, the process is simple, the energy consumption is low, and sulphur and nitrogen are removed efficiently.

Description

technical field [0001] The invention relates to a sewage treatment technology, specifically a method for treating sewage with an anaerobic membrane bioreactor for desulfurization and nitrogen removal. Background technique [0002] In recent years, the pollution of organic wastewater containing sulfur and nitrogen has become increasingly serious. The wastewater discharged from pharmaceutical, fermentation, chemical, food processing, tannery and mining industries in modern industrial production contains organic wastewater with high concentrations of sulfate and ammonia nitrogen. Nitrogen-containing compounds (such as ammonia nitrogen) can accelerate the proliferation of algae and other aquatic organisms, trigger eutrophication of water bodies, and cause algal blooms and red tides. Sulfur-containing compounds (such as sulfate) can be reduced to sulfide by microorganisms under anaerobic conditions, which not only causes biological corrosion, but also produces toxic and harmful ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34
Inventor 王悦超陈静
Owner LG ELECTRONICS CHINA RANDD CENT SHANGHAI CO LTD
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