Method and device for treating urban domestic sewage at low-temperature environment

A technology for urban domestic sewage and low-temperature environment, which is applied in energy wastewater treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., and can solve the problems of low microbial biochemical activity, operational stability of biological treatment process and unsatisfactory effluent quality, etc. problems, to achieve the effect of strengthening structure and settlement performance, enhancing biochemical treatment capacity, and controlling sludge bulking

Inactive Publication Date: 2015-11-25
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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Problems solved by technology

[0003] The object of the present invention is to provide a method and device for treating urban domestic sewage in a low-temperature environment to solve the problem of low microbial biochemical activity when the water temperature is low. Biological treatment process operation stability and effluent water quality are not ideal, so as to overcome the shortcomings of existing technologies

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  • Method and device for treating urban domestic sewage at low-temperature environment
  • Method and device for treating urban domestic sewage at low-temperature environment

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Embodiment

[0026] This example figure 1 As shown, urban domestic sewage enters the sewage pipe 1 through the sewage pump 3 and enters the micro-electrolysis column 4. Under the condition of intermittent aeration at the bottom of the micro-electrolysis column, the sewage undergoes oxidation-reduction reactions in the micro-electrolysis column, and the generated iron ion flocculation The body plays the role of adsorbing pollutants such as organic matter, nitrogen and phosphorus in urban domestic sewage. At the same time, the iron ion flocs generated enter the sewage and enter the sequence batch reactor 6 together. In the sequence batch reactor, the iron ion flocs transfer electrons to promote microorganisms. Growth and biochemical activities, improve microbial activity, and enhance the removal efficiency of organic matter. By turning on the mixer 9 intermittently, anaerobic 75 minutes, aerobic 165 minutes, subanaerobic 90 minutes, and aerobic 120 minutes form short-range nitrification a...

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Abstract

The invention discloses a method and device for treating urban domestic sewage at a low-temperature environment. According to the method, sewage treatment is completed together by a microelectrolysis column and a sequencing batch reactor; iron ion flocculation which is generated from sewage in the microelectrolysis column by means of oxidation-reduction, and is used for preventing sludge in the sewage from expanding at a low temperature, and the adsorbability of iron ion flocculation on organic matters, nitrogen, phosphorous and other pollutants in the sewage and the sewage settling performance can be improved; and after the iron ion flocculation and sewage enter the sequencing batch reactor, through the ion transferring effect of the iron ion flocculation, growth and biochemical activities of microorganisms in the activated sludge under a low-temperature condition can be improved, and the biochemical treatment capability is enhanced. The method and device can be used for well solving the requirement for urban domestic sewage treatment at a low-temperature climatic environment which lasts more than 3 months every year in northwest regions of China.

Description

technical field [0001] The invention relates to a method and a device for treating urban domestic sewage in a low-temperature environment, belonging to the technical field of urban domestic sewage treatment. Background technique [0002] When the traditional activated sludge method is used to treat urban domestic sewage, the organic matter in the sewage is converted into inorganic matter in the process of assimilation of microorganisms in the activated sludge and then removed. Environment, due to the low water temperature and low microbial biochemical activity, the sludge will not only directly reduce the biochemical purification capacity but even easily lead to sludge bulking. Particles and colloidal agglomerates in low-temperature sewage, in particular, will seriously inhibit microbial activity, thereby reducing the operational stability of the biological treatment process and the quality of the effluent. Therefore it is necessary to develop a new type of iron-carbon acti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCY02W10/37
Inventor 张奎
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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