Method for reinforcing anoxic-aerobic-precipitated-anaerobic technological sludge decrement

A sludge reduction and process technology, applied in aerobic and anaerobic process treatment, chemical instruments and methods, biological sludge treatment, etc., to achieve easy transformation, sludge treatment cost remains unchanged, and sludge reduction effect increased effect

Active Publication Date: 2017-09-22
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

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  • Method for reinforcing anoxic-aerobic-precipitated-anaerobic technological sludge decrement
  • Method for reinforcing anoxic-aerobic-precipitated-anaerobic technological sludge decrement
  • Method for reinforcing anoxic-aerobic-precipitated-anaerobic technological sludge decrement

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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%; holes are set at the corresponding positions of the anaerobic tank wall to set the outlet pipe, and lead to the upper part of the anoxic tank;

[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 p...

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%; holes are set at the corresponding positions of the anaerobic tank wall to set the outlet pipe, and lead to the upper part of the anoxic tank;

[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 p...

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%; set up outlet pipes at corresponding positions on the wall of the anaerobic pool, and lead them to the upper part of the anoxic pool;

[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 and nitrification ...

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Abstract

The invention belongs to the technical field of sewage treatment, and discloses a method for reinforcing anoxic-aerobic-precipitated-anaerobic technological sludge decrement. According to the method, sewage is introduced into an anoxic pond to provide a carbon source for a denitrification process, and flows to an aeration pond to be subjected to aerobic treatment and a nitrification process, a sludge-water mixture at the tail end of the aeration pond is delivered to the anoxic pond to achieve denitrification, and the sewage in the aeration pond is introduced into a precipitation pond to conduct natural precipitation to achieve sludge-water separation; the precipitated sludge in the precipitation pond is pumped to an anaerobic pond, a stirring device and a filler device are installed in the anaerobic pond, 20%-30% by volume amount of filler is added in the filler device to increase the sludge-attach specific surface area, and by controlling the temperature and stirring speed of the anaerobic pond, the 80% sludge decrement effect can be achieved, so that the anoxic-aerobic-precipitated-anaerobic technological sludge decrement effect is remarkably improved. Meanwhile, the outflow mode of the anaerobic pond is improved, an outflow tube is arranged at the pond wall, the outflow is gravity overflow, the energy consumption is saved, and the comprehensive utilization rate is effectively increased.

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 Applications(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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