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Multistage circulation composite sewage treatment method

A sewage treatment method and composite technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problem of less use of municipal sewage treatment, and improve nitrification Ability and ability to resist shock loads, improve the effect, prolong the effect of the residence time

Inactive Publication Date: 2008-07-09
TIANJIN CAPITAL ENVIRONMENTAL PROTECTION GRP CO LTD
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Problems solved by technology

However, limited by technical level, project cost, operation and maintenance, etc., it is currently mainly used in industrial sewage treatment in China, and less used in municipal sewage treatment.

Method used

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  • Multistage circulation composite sewage treatment method

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Embodiment Construction

[0008] The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0009] Please refer to FIG. 1 , the multi-stage circulating composite sewage treatment method of the present invention is suitable for a two-stage push-flow urban sewage treatment plant. Add zone 2. The anoxic zone 1 is located at the front end of the aeration tank, and the volume of the anoxic zone is determined according to the design requirements of denitrification; the suspended filler addition zone 2 is located after the anoxic zone 1, and the suspension filler addition zone 2 is placed in the suspension for sewage treatment. filler.

[0010] In the embodiment of the present invention, the suspension filler dosing area 2 is divided into several processing units, and the number of the processing units can be determined according to the actual needs of the process. In Figure 1 of the present invention, two process...

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Abstract

The invention discloses a multi-stage combined-cycle sewage treatment method, which is adaptable to two-stage plug-flow urban sewage treatment plants. An aeration tank of the two-stage plug-flow urban sewage treatment plant is divided into an anoxic zone and an adding zone of suspension filling material, wherein the anoxic zone is arranged at the rear end of the aeration tank and communicated with a water inlet of the aeration tank and the adding zone of suspension filling material is arranged behind the anoxic zone. The adding zone of suspension filling material is divided into a plurality of processing units, each processing unit comprises two galleries, each gallery is internally equipped with a diving propeller, each processing unit is internally provided with a baffle wall, two ends of the baffle wall and two side walls of the aeration tank are provided with openings, and under the propelling of the diving propeller, suspension filling material and mixed liquor placed in the adding zone of suspension filling material circulate and flow along the galleries. The invention enables the sewage entering the adding zone of suspension filling material to realize multi-stage multi-time circulatory flow in the adding zone of suspension filling material, thereby increasing the effect of sewage treatment.

Description

【Technical field】 [0001] The invention relates to the technical field of sewage biological treatment, in particular to a multi-stage circulating compound sewage treatment method suitable for a two-stage push-flow urban sewage treatment plant. 【Background technique】 [0002] At present, most of the urban sewage treatment plants in my country use the activated sludge method for secondary biological treatment. Compared with other processes, the activated sludge method has the characteristics of low investment and operating costs, relatively simple system, strong adaptability and stable operation. Sewage discharge standards continue to be stricter, and higher requirements for the discharge of nutrients such as nitrogen and phosphorus in sewage are required. In order to achieve a good nitrification effect, it is necessary to increase the tank capacity to reduce the organic load. The traditional nitrogen and phosphorus removal function. The sewage treatment process often needs to co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F1/52
CPCY02W10/10
Inventor 顾启峰邓彪张轶凡张宝祥张建乌兰
Owner TIANJIN CAPITAL ENVIRONMENTAL PROTECTION GRP CO LTD
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