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Biochemical reaction basin for sewage employing multi-scheme biochemical treatment process and operation method of biochemical reaction basin

A biochemical reaction and biochemical treatment technology, applied in the adjustment methods of biological treatment, chemical instruments and methods, biological water/sewage treatment, etc. Improve biodegradability, strong phosphorus absorption ability, simple and easy adjustment

Active Publication Date: 2015-01-21
开封浦华紫光水业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Nitrogen removal and phosphorus removal have contradictory requirements on external environmental conditions. Nitrogen removal requires lower organic load and longer sludge age, while phosphorus removal requires higher organic load and shorter sludge age. It is often difficult to balance ;
[0006] (2) Since the anaerobic zone is in front, the nitrate in the return sludge has an adverse effect on the anaerobic zone;
[0007] (3) Since the anoxic zone is located in the middle of the system, denitrification is in a disadvantageous position in the distribution of carbon sources, thus affecting the denitrification effect of the system;
[0008] (4) Due to the existence of internal circulation, at least a small part of the excess sludge discharged from the conventional process system has actually experienced a complete phosphorus release and phosphorus absorption process, and the rest basically enters directly from the anoxic zone without anaerobic state. Aerobic zone, which is unfavorable for system phosphorus removal;

Method used

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  • Biochemical reaction basin for sewage employing multi-scheme biochemical treatment process and operation method of biochemical reaction basin
  • Biochemical reaction basin for sewage employing multi-scheme biochemical treatment process and operation method of biochemical reaction basin
  • Biochemical reaction basin for sewage employing multi-scheme biochemical treatment process and operation method of biochemical reaction basin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] See Figure 5 . The biochemical reaction tank for multi-plan biochemical treatment process sewage, the biochemical reaction tank is rectangular, including seven reaction grids 1#, 2#, 3#, 4#, 5#, 6#, 7# and aerobic grid 8#; The seven reaction grids are arranged in an L shape on one side of the biochemical reaction pool, wherein the first to sixth reaction grids are anaerobic or anoxic grids, and the seventh is a facultative oxygen grid; the facultative oxygen grid is connected to an aerobic grid. Grid;

[0061] Aerobic grid 8# is in the form of five corridors connected in a rotary manner, which is arranged on the other side of the biochemical reaction pool and occupies the area beyond the seven reaction grids; the reaction grid and the aerobic grid are separated by a partition wall .

[0062] The seven reaction grids are square, 1#, 2#, 3#, and 4# grids are arranged side by side on the side of the biochemical reaction pool, and 5#, 6#, 7# grids are arranged in the ve...

Embodiment 2

[0069] Embodiment 2: adopt anaerobic+anoxic+aerobic process

[0070] Taking a domestic sewage treatment project as an example, the application of this multi-plan AAO process activated sludge sewage treatment system and method is explained and tested.

[0071] A sewage treatment project, the influent is mainly domestic sewage, and the water volume is 4000m 3 / d. The multi-program anaerobic-anoxic-aerobic treatment process is adopted, and the influent and effluent water quality are as follows:

[0072] Table 1 Inlet and effluent water quality of sewage plant

[0073] project COD BOD SS Ammonia nitrogen TN TP Influent index 360 180 130 36 45 4.0 Water index 50 10 15 5 12 0.5

[0074] The sludge return weir door of 1# cell is opened, the water inlet weir door of 1# cell is opened, and the mixed liquid return pump is placed at the 3# cell. In the anoxic zone, the 7# grid can be used as the anoxic zone or the aerobic zone. When it ...

Embodiment 3

[0078] A sewage treatment project, the influent is mainly domestic sewage and printing and dyeing wastewater, with a water volume of 6000m 3 / d. The multi-scheme anaerobic acidification-anoxic-aerobic treatment process is adopted, and the influent and effluent water quality are as follows:

[0079] Table 1 Inlet and effluent water quality of sewage plant

[0080] project COD BOD SS Ammonia nitrogen TN TP Influent index 700 180 150 20 30 3.5 Water index 50 10 15 5 12 0.5

[0081] The valve of the 4# cell sludge return pipe is opened, the 1# cell inlet weir door is opened, the 1# cell sludge return weir door is closed, and the mixed liquid return pump is placed at the 5# cell, at this time, the 1# ~ 3# cell is exhausted. Oxygen acidification area, 4# grid is anaerobic area, 5#~7# grid is anoxic area, when the biodegradability of influent water is poor (BOD / COD<0.3), this process is suitable for use, which can improve the biodegra...

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Abstract

The invention relates to a biochemical reaction basin for sewage employing a multi-scheme biochemical treatment process. The biochemical reaction basin is a rectangle and comprises seven reaction lattices and aerobic lattices; the seven reaction lattices are arranged on one side of the biochemical reaction basin in an L shape; the first to the sixth reaction lattices are anaerobic lattices or anoxic lattices; the seventh reaction lattice is a facultative lattice, which is connected with the aerobic lattices; the aerobic lattices are in a form of rotary communication of five galleries, are arranged on the other side of the biochemical reaction basin and completely occupy the area out of the seven reaction lattices; and the reaction lattices are separated from the aerobic lattices by virtue of a partition wall. According to a sewage treatment system employing a multi-scheme biochemical treatment process provided by the invention, the multi-scheme biochemical treatment mode process is achieved in the same pond body, and can be flexibly adjusted according to different inflow quality; due to adoption of various operation modes, operation advantages of various processes are integrated; the operation modes can be seasonally adjusted according to the water quality situation; and the optimal appropriate treatment process is selected.

Description

technical field [0001] The invention relates to a multi-mode constant water sequence batch type activated sludge improved sewage treatment method and a system thereof, belonging to the technical field of sewage treatment. Background technique [0002] The main purpose of urban sewage treatment is to remove nitrogen and phosphorus. The traditional treatment modes include 1. Anaerobic-anoxic-aerobic process, which is a simultaneous phosphorus and nitrogen removal process developed in the 1970s. It has the functions of biological phosphorus and nitrogen removal . Its biological reaction tank is composed of three sections: anaerobic, anoxic and aerobic, and its typical process is shown in figure 1 . [0003] In this process, the anaerobic tank is used for biological phosphorus removal, and the anoxic tank is used for biological nitrogen removal. The carbon source substances in the raw sewage enter the anaerobic tank first, and the phosphorus-accumulating bacteria preferentiall...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCC02F3/006C02F3/301C02F3/308C02F2101/16
Inventor 周丽颖李星文王旭仲崇川张玉峰
Owner 开封浦华紫光水业有限公司