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Starting method of nitrosated granule sludge for treating urban sewage

A technology for urban domestic sewage and nitrosation particles, which is applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc. and other problems, to achieve the effect of simple operation and easy control

Active Publication Date: 2015-06-17
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Anaerobic ammonium oxidation requires influent NO 2 - -N / NH 4 + -N ratio is 1.32:1, strict water inlet conditions become the technical bottleneck restricting the development of this process
Nitrosification is its premise and basis. In actual research, there are problems such as difficult retention and growth of sludge, poor impact load resistance, and easy instability in long-term operation.

Method used

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  • Starting method of nitrosated granule sludge for treating urban sewage
  • Starting method of nitrosated granule sludge for treating urban sewage
  • Starting method of nitrosated granule sludge for treating urban sewage

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Embodiment

[0024] The invention is a start-up method of treating urban domestic sewage with nitrosation granular sludge in a continuous flow mode at normal temperature, and its idea is: stable operation through nitrosation flocculent sludge——nitrosation granular sludge cultivation——nitrosation granular sludge Sludge treatment of domestic sewage.

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Abstract

The invention discloses a starting method of nitrosated granule sludge for treating urban sewage, the method comprises the following steps: first inoculating the nitrosation to sewage plant mixed sludge, doubly diluting the urban sewage by using tap water to guarantee the stable operation of the nitrosation process; and then continuously improving water inlet flow to increase the hydraulic shear force, regulating aeration rate to guarantee a certain total nitrogen loss, oxygenation rate and nitrosation rate to granulate the flocculent sludge, and finally changing the water inlet as the unban sewage, and strengthening the treating performance. The starting of the nitrosated granule sludge for treating the urban sewage under the continuous flow mode is successfully realized.

Description

technical field [0001] The invention belongs to the field of water environment restoration and regeneration and the field of autotrophic denitrification of sewage treatment plants. Specifically, the invention relates to a starting method for treating nitrosated granular sludge of normal-temperature, low-ammonia-nitrogen urban domestic sewage. Background technique [0002] Since the Eleventh Five-Year Plan, the state has stepped up efforts to control environmental pollution, especially in the restoration of the water environment, and implemented a major national science and technology project - Water Pollution Control and Treatment, with an investment of 11.266 billion yuan. This figure will further increase to more than 14 billion yuan. This move is to solve the problem of water eutrophication caused by excessive discharge of nitrogen and phosphorus in recent years. According to the 2012 Environmental Status Bulletin, the surface water in the country is generally slightly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 李冬吴青苏庆岭梁瑜海曾辉平张杰
Owner BEIJING UNIV OF TECH
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