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Improved A<2>O and sulphur autotrophy joint nitrogen and phosphorus removal reactor and sewage treatment method

A sewage treatment method and technology for denitrification and phosphorus removal, which are applied in water/sewage treatment, biological water/sewage treatment, water/sewage multi-stage treatment, etc. The effect of nitrate concentration, quick start and simple operation

Active Publication Date: 2018-08-21
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Application Information

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Problems solved by technology

However, the application of these new denitrification processes often requires precise control of operating conditions, such as temperature, pH, alkalinity, dissolved oxygen, etc., and strict operating conditions limit the application range of the new denitrification process

Method used

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  • Improved A&lt;2&gt;O and sulphur autotrophy joint nitrogen and phosphorus removal reactor and sewage treatment method
  • Improved A&lt;2&gt;O and sulphur autotrophy joint nitrogen and phosphorus removal reactor and sewage treatment method
  • Improved A&lt;2&gt;O and sulphur autotrophy joint nitrogen and phosphorus removal reactor and sewage treatment method

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Experimental program
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Effect test

Embodiment 1

[0047] 30% of the influent and return sludge enter the pre-anoxic zone through the influent pump and the sludge return pipe respectively, and the denitrifying bacteria use 30% of the organic matter in the influent to remove the nitrate carried in the return sludge in the pre-anoxic zone . The mud-water mixture from which nitrate nitrogen has been removed enters the anaerobic zone through the lower part of the perforated partition, and the anaerobic zone receives 40% of the incoming water. The phosphorus accumulating bacteria in the activated sludge use the organic matter in the influent to release phosphorus in the anaerobic zone, and then enter the anoxic zone 3 through the upper part of the perforated partition, and the anoxic zone accepts 30% of the influent. The denitrification and phosphorus removal bacteria in the activated sludge and the denitrification bacteria use the organic matter in the influent water and the nitrate nitrogen returned from the nitrification liquid ...

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Abstract

The invention belongs to the field of biotreatment of wastewater or sewage, and particularly relates to an improved A<2>O and sulphur autotrophy joint nitrogen and phosphorus removal reactor and a sewage treatment method. The reactor comprises an improved A<2>O process section and a sulphur autotrophy process section, wherein the improved A<2>O process section comprises a pre-anoxic zone, an anaerobic zone, an anoxic zone, an aerobic zone and a secondary sedimentation tank. The nitrogen removal efficiency of the reactor reaches more than 95% due to the combination of heterotrophism-autotrophicdenitrification, and the reactor is better adaptive to the low-carbon nitrogen ratio municipal sewage. In addition, the proportion of step-feed water entering the anaerobic zone is properly increasedto guarantee the biological phosphorus removal effect.

Description

technical field [0001] The invention belongs to the field of biological treatment of waste water or sewage, in particular to an improved A 2 O and sulfur autotrophic joint nitrogen and phosphorus removal reactor and sewage treatment method. Background technique [0002] Sewage treatment facilities are becoming increasingly important to ensure the development of urbanization in my country. Improving the processing capacity of existing sewage treatment facilities, responding to the requirements of high discharge standards and gradually improving the quality of water environment in the basin play an important role in the smooth implementation of my country's urbanization development strategy. However, with the continuous improvement of people's living standards, the content of protein and amino acid substances in sewage continues to increase. In addition, the transportation distance of the urban drainage pipe network is continuously increasing, resulting in a long anaerobic tr...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F9/14
CPCC02F1/5281C02F3/308C02F9/00C02F2001/007C02F2003/001C02F2209/08C02F2209/16C02F2301/04
Inventor 李海波田智勇王思宇孙晨宋永会
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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