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Synchronous nitrification and denitrification treatment method of ammonia-containing wastewater

A technology for synchronous nitrification and treatment methods, applied in anaerobic digestion treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve problems such as difficult operation, low removal rate, and small load, and improve nitrogen removal efficiency , Improve the effect of denitrification activity

Active Publication Date: 2015-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires the use of biological carriers to construct biofilms with different biomass and biological species. The biofilm carrier needs to have a gradient state of dissolved oxygen concentration in aerobic, anoxic and facultative regions from the surface to the inside, and the actual operation is difficult. Larger, cannot regulate the denitrification efficiency of nitrifying bacteria and denitrifying bacteria
[0006] At present, although synchronous nitrification and denitrification has made great progress, there are generally problems such as small load, low removal rate, unstable operation, etc., and cannot effectively treat ammonia-containing wastewater, and some operating processes do not consider total nitrogen. removal problem
This greatly limits the development and application of simultaneous nitrification and denitrification process

Method used

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Effect test

Embodiment 1

[0029] using the present invention figure 1 In the aerated bioreactor shown, the effective volume of the reactor is 10L, the material of the reactor is plexiglass, the temperature is controlled by heating with a temperature control jacket, and controllers such as pH and dissolved oxygen. The height-to-diameter ratio of the reactor is 10:1, and the volume ratio of the nitrification zone to the denitrification zone is 2:1. The separation membrane adopts a ceramic separation membrane with a membrane pore diameter of 0.5 μm. The diameter ratio of the inner cylinder set in the nitrification area to the reactor is 1:2, and the diameter ratio of the inner cylinder set in the denitrification area to the reactor is 1:3.

[0030] In the wastewater treatment process, the nitrification sludge and the aerobic denitrification sludge are firstly added to the nitrification zone and the aerobic denitrification zone of the reactor respectively, and the sludge concentration of the nitrification...

Embodiment 2

[0035] using the present invention figure 1 In the aerated bioreactor shown, the effective volume of the reactor is 10L, and the material of the reactor is plexiglass. There are temperature control coils in the reactor, as well as controllers such as pH and dissolved oxygen. The height-to-diameter ratio of the reactor is 10:1, and the volume ratio of the nitrification zone to the denitrification zone is 1:1. The separation membrane adopts a ceramic separation membrane with a membrane pore diameter of 0.2 μm. The diameter ratio of the inner cylinder set in the nitrification area to the reactor is 1:2, and the diameter ratio of the inner cylinder set in the denitrification area to the reactor is 1:3.

[0036] In the wastewater treatment process, firstly, nitrification sludge and anaerobic denitrification sludge are added to the nitrification zone and denitrification zone of the reactor respectively, and the sludge concentration of the nitrification sludge is controlled at 4.0-5...

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Abstract

The invention provides a synchronous nitrification and denitrification treatment method of ammonia-containing wastewater. The method comprises the following contents: a separating membrane is arranged in an aeration bioreactor so as to divide the aeration bioreactor into upper and lower areas; ammonia-containing wastewater firstly enters a lower nitrification area to undergo nitrification, then passes through the separating membrane and enters an upper denitrification area, and finally outflows through a water outlet of the upper area; a hollow cylindrical inner barrel is arranged in the nitrification area, and an aerating system carries out aeration at the inner side of the inner barrel; a hollow bell-mouth inner barrel is arranged in the denitrification area; the bell-mouth faces downward and diameter of the lower end of the bell-mouth is greater than diameter of the cylindrical inner barrel. By the use of the separating membrane, nitrifying activated sludge and denitrifying activated sludge in the bioreactor are separated from each other. Thus, sludge plays its role in a respective independent space, not interfering with each other. Intercommunication of wastewater composition is realized. In addition, different dissolved oxygen environments can be provided, and synchronous nitrification and denitrification efficiency is raised.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a simultaneous nitrification and denitrification treatment method for ammonia-containing wastewater. Background technique [0002] Due to the characteristics of the production process, chemical production enterprises discharge a large amount of ammonia-containing wastewater every day. If it is directly discharged, it will cause eutrophication of the water body and excessive growth of algae, which not only reduces the ornamental value of the water body, but also causes the death of aquatic organisms due to hypoxia. Some algae protein toxins can also poison people through the food chain, seriously endangering human and biological survival. Therefore, how to economically and effectively remove ammonia nitrogen in wastewater has become an urgent problem to be solved. [0003] Biological nitrogen removal is one of the more cost-effective methods to remove nitrogen pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/02C02F3/28C02F101/16
CPCC02F3/301C02F3/302Y02E50/30Y02W10/10
Inventor 赵磊李宝忠孙丹凤张鹏
Owner CHINA PETROLEUM & CHEM CORP