A method for strengthening anoxic-aerobic-sedimentation-anaerobic process sludge reduction

A sludge reduction and process technology, applied in aerobic and anaerobic process treatment, chemical instruments and methods, biological sludge treatment, etc., to achieve energy saving, sludge reduction effect improvement, and sludge reduction effect increased effect

Active Publication Date: 2021-06-04
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process is still in the research stage, and there are still problems in the stability and reliability of production and operation. According to the status quo of sludge disposal, it is very necessary to strengthen the sludge reduction efficiency of the A+OSA process. The specific and feasible measures still need to be further explored

Method used

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  • A method for strengthening anoxic-aerobic-sedimentation-anaerobic process sludge reduction
  • A method for strengthening anoxic-aerobic-sedimentation-anaerobic process sludge reduction
  • A method for strengthening anoxic-aerobic-sedimentation-anaerobic process sludge reduction

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Experimental program
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Effect test

Embodiment 1

[0028] The experimental sludge was taken from the aerobic section of the traditional AAO process of Chongqing Jiguanshi Wastewater Treatment Plant. The pool is 6000mg / L.

[0029] A method of strengthening anoxic-aerobic-precipitation-anaerobic process sludge reduction in the present invention, such as figure 1 shown, including the following steps:

[0030] (1) Add a stirring device and a packing device to the anaerobic tank of the A+OSA process. The packing device is an annular space surrounded by two cylindrical stainless steel concentric mesh cylinders; add internal multi-fold spherical Polypropylene material, the filling ratio is controlled to 20%; the outflow pipe is set at the corresponding position of the anaerobic pool wall and led to the upper part of the anoxic pool;

[0031] (2) The sewage is introduced into the anoxic tank to provide carbon source for denitrification; the sewage flows into the aeration tank for aerobic treatment and nitrification process, and the ...

Embodiment 2

[0035] The experimental sludge was taken from the aerobic section of the traditional AAO process of Chongqing Jiguanshi Wastewater Treatment Plant. The pool is 6000mg / L.

[0036] A method of strengthening anoxic-aerobic-precipitation-anaerobic process sludge reduction in the present invention, such as figure 1 shown, including the following steps:

[0037] (1) Add a stirring device and a packing device to the anaerobic tank of the A+OSA process. The packing device is an annular space surrounded by two cylindrical stainless steel concentric mesh cylinders; add internal multi-fold spherical Polypropylene material, the filling ratio is controlled to 20%; the outflow pipe is set at the corresponding position of the anaerobic pool wall and led to the upper part of the anoxic pool;

[0038] (2) The sewage is introduced into the anoxic tank to provide carbon source for denitrification; the sewage flows into the aeration tank for aerobic treatment and nitrification process, and the ...

Embodiment 3

[0042] The experimental sludge was taken from the aerobic section of the traditional AO process of Chongqing Jiguanshi Sewage Treatment Plant. The pool is 6000mg / L.

[0043] A method of strengthening anoxic-aerobic-precipitation-anaerobic process sludge reduction in the present invention, such as figure 1 shown, including the following steps:

[0044] (1) Add a packing device to the anaerobic tank of the conventional A+OSA process. The packing device is an annular space surrounded by two cylindrical stainless steel concentric mesh cylinders; add inner multi-folded spherical polypropylene between the two mesh cylinders material, control the filling ratio to 25%; open holes at the corresponding positions on the wall of the anaerobic tank to set the outlet pipe, and lead it to the upper part of the anoxic tank;

[0045] (2) The sewage is introduced into the anoxic tank to provide carbon source for denitrification; the sewage flows into the aeration tank for aerobic treatment an...

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Abstract

The invention belongs to the technical field of sewage treatment and discloses a method for strengthening anoxic-aerobic-sedimentation-anaerobic process sludge reduction. The method of the invention is to introduce the sewage into the anoxic tank to provide carbon source for the denitrification process, the sewage flows through the aeration tank for aerobic treatment and nitrification process, and the mud-water mixture at the end of the aeration tank is pumped to the anoxic tank to realize denitrification and aeration The sewage in the pool is introduced into the sedimentation tank for natural sedimentation to realize the separation of mud and water; the sedimentation sludge in the sedimentation tank is pumped to the anaerobic tank, and a stirring device and a packing device are installed in the anaerobic tank, and 20~30% of the volume is added to the packing device 80% of the sludge reduction effect can be achieved by controlling the temperature and stirring speed of the anaerobic tank, and the sludge reduction effect of the anoxic-aerobic-sedimentation-anaerobic process is remarkable Increase. At the same time, the present invention reforms the outflow mode of the anaerobic pool. The outflow pipe is arranged at the pool wall, and the outflow is gravity overflow, which saves energy consumption and effectively improves the comprehensive utilization rate.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and relates to sludge reduction technology, in particular to a method for strengthening sludge reduction in anoxic-aerobic-sedimentation-anaerobic process. Background technique [0002] Activated sludge method is the most common sewage biological treatment technology. More than 90% of urban sewage and about 50% of industrial wastewater in the world are treated by activated sludge method, but since its application in sewage treatment, a major problem It is to produce a large amount of surplus sludge. The cost of sludge treatment has accounted for 50% to 60% of the operating cost of the entire sewage plant. Moreover, with the development of economy and society, the amount of sewage treatment is increasing, and the treatment requirements will also continue to increase. The large amount of excess sludge produced is the biggest bottleneck faced by the activated sludge process. [0003] The d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F11/04
CPCC02F3/302C02F11/04C02F2303/06
Inventor 宁欣强唐棠高旭左勇乔文文
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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