High-efficiency nitrogen removal and dephosphorization device and process method using multi-stage AO composite IFAS technology

A technology for denitrification and phosphorus removal and process method, which is applied in the field of high-efficiency nitrogen and phosphorus removal devices with multi-stage AO composite IFAS technology, can solve the problems of difficulty in further improving the denitrification effect, deterioration of effluent water quality, and difficult phosphorus removal effect, etc., to achieve maintenance Microbial activity of the filler, high oxygen utilization rate, and the effect of improving the processing capacity and its performance

Pending Publication Date: 2019-01-29
ZHEJIANG BOHUA ENVIRONMENTAL TECH & ENG
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AI Technical Summary

Problems solved by technology

The main disadvantage is: the treatment efficiency is low, and the treated effluent comes from the nitrification tank, so the effluent contains a certain concentration of nitrates. If the sedimentation tank is not operated properly, denitrification will also occur in the sedimentation tank, causing the sludge to float. Afterwards, the quality of the effluent deteriorates. In addition, if the denitrification rate needs to be increased, the reflux ratio of the mixed solution must be increased, which will inevitably increase the o

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  • High-efficiency nitrogen removal and dephosphorization device and process method using multi-stage AO composite IFAS technology
  • High-efficiency nitrogen removal and dephosphorization device and process method using multi-stage AO composite IFAS technology
  • High-efficiency nitrogen removal and dephosphorization device and process method using multi-stage AO composite IFAS technology

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[0038] The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.

[0039] Such as figure 1 As shown, a multi-stage AO composite IFAS technology high-efficiency nitrogen and phosphorus removal device of the present invention includes AⅠ anaerobic tank 101, AⅡ anoxic tank 102, OⅠ aerobic tank 103, OⅡ aerobic tank 104, AⅢ anoxic tank 105, OⅢ aerobic tank 106 and secondary sedimentation tank 107; AⅠ anaerobic tank 101, AⅡ anoxic tank 102 and AⅢ anoxic tank 105 are respectively provided with a first agitator 108, a second agitator 109 and a third agitator 110, OⅡ aerobic tank 104, AⅢ anoxic tank 105 and OⅢ aerobic tank 106 are also equipped with suspended packing 118, the filling rate is 20%-60%; AⅠ anaerobic tank 101, AⅡ anoxic tank 102, OⅠ Aerobic tank 103, OⅡ aerobic tank 104,...

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Abstract

The invention provides a high-efficiency nitrogen removal and dephosphorization device and process method using a multi-stage AO composite IFAS technology. The device includes an AI anaerobic tank, anAII anoxic tank, an OI aerobic tank, an OII aerobic tank, an AIII anoxic tank, an OIII aerobic tank and a secondary settling tank. The device and method can improve the efficiency of nitrogen removaland dephosphorization, correspond to existing sewage plant treatment process, get rid of the limitation of use of land, facilitate the implementation of standard upgrade speed up the process of standard upgrade of the sewage plant and greatly improve the technical level of sewage treatment.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a high-efficiency denitrification and dephosphorization device and process method of multi-stage AO composite IFAS technology. Background technique [0002] In recent years, the Ministry of Environmental Protection recently announced the national "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (Draft for Comment), which has added relevant indicators for special discharge limits. The main indicators refer to "Surface Water Environmental Quality Standards (3838-2002 )”, Beijing, Tianjin, Guangdong, Jiangsu, Zhejiang and other regions have successively issued local standards, and have successively carried out related work to raise the standard for Class IV water. The discharge index of quasi-IV water standard has stricter requirements than the "Pollutant Discharge Standard for Urban Sewage Treatment Plants" (GB18918-2002), in which the special discharge li...

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Application Information

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IPC IPC(8): C02F3/30C02F101/10C02F101/16
CPCC02F3/302C02F2301/08C02F2101/16C02F2101/10
Inventor 张鹏翔朱强甘树邵元卿
Owner ZHEJIANG BOHUA ENVIRONMENTAL TECH & ENG
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