Microbubble ozonation-thin layer drying combined treatment device and method for excess sludge

A technology of excess sludge and ozone oxidation, which is applied in dewatering/drying/concentrating sludge treatment, sludge treatment, biological sludge treatment, etc. problems, to achieve the effect of improving ozone utilization, reducing sludge discharge and reducing costs

Inactive Publication Date: 2021-08-24
SHANGHAI MUNICIPAL WATER RESOURCES DEV & UTILIZATION NAT ENG CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common treatment process is concentration, dehydration and digestion. This treatment method is cumbersome and expensive.
Thin-layer sludge drying, as a new type of sludge mechanical dehydration method, can reduce the moisture content of sludge to less than 50%, but there is a lack of pretreatment measures to stabilize and reduce sludge, resulting in sludge resources low level of utilization

Method used

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  • Microbubble ozonation-thin layer drying combined treatment device and method for excess sludge
  • Microbubble ozonation-thin layer drying combined treatment device and method for excess sludge
  • Microbubble ozonation-thin layer drying combined treatment device and method for excess sludge

Examples

Experimental program
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Effect test

Embodiment 1

[0061] Embodiment 1: Through the mud inlet pipe, the remaining sludge with a moisture content of about 99% is passed in the sludge reaction tank 1, and it is allowed to stay in the sludge reaction tank 1 for 2 hours. The amount of ozone added and the quality of the sludge The ratio range is about 1:400. After the aeration is over, the tail gas enters the biochemical tank through the gas pipeline for aeration, the remaining sludge is separated from the mud and water, and the supernatant is returned to the biochemical tank through the pipeline. The aerated sludge enters the pre-conditioning tank 4 through the pipeline, and is washed with the effluent of the biochemical tank. After the elutriation, the sludge is separated from the mud and water, and the supernatant is returned to the biochemical tank through the pipeline. The preconditioned sludge enters the conditioning tank 5 through the pipeline, and is conditioned by adding flocculants. After conditioning, the sludge is sep...

Embodiment 2

[0062] Embodiment 2: Through the mud inlet pipe, the remaining sludge with a moisture content of about 99.5% is passed in the sludge reaction tank 1, so that it stays in the sludge reaction tank 1 for 3 hours, the amount of ozone dosage and the quality of the sludge The ratio range is about 1:800. After the aeration is over, the tail gas enters the biochemical tank through the gas pipeline for aeration, the remaining sludge is separated from the mud and water, and the supernatant is returned to the biochemical tank through the pipeline. The aerated sludge enters the pre-conditioning tank 4 through the pipeline, and is washed with the effluent of the biochemical tank. After the elutriation, the sludge is separated from the mud and water, and the supernatant is returned to the biochemical tank through the pipeline. The preconditioned sludge enters the conditioning tank 5 through the pipeline, and is conditioned by adding flocculants. After the conditioning, the sludge is separ...

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Abstract

The invention discloses a microbubble ozonation-thin layer drying combined treatment device and method for excess sludge. The device comprises: a sludge reaction tank (1), which is used for enabling the excess sludge entering the sludge reaction tank (1) to cyclically react with ozone gas microbubbles and then to be fed into a pre-conditioning pool (4); the pre-conditioning tank (4), which is used for pre-treating the sludge treated by the sludge reaction tank (1) and feeding the pre-treated sludge into a conditioning tank (5); the conditioning tank (5), which is used for conditioning the sludge entering the conditioning tank (5) by using a flocculating agent to form concentrated sludge; a plate-and-frame filter press (7), which is used for dewatering the sludge entering the plate-and-frame filter press (7) and feeding the dewatered sludge into a thin-layer drying machine (9) for thin-layer drying; and the thin-layer drying machine (9), which is used for carrying out thin-layer drying on the sludge fed by the plate-and-frame filter press (7) by utilizing hot water vapor.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to an excess sludge treatment device and method combined with micro-bubble ozone oxidation and thin-layer drying. Background technique [0002] With the continuous improvement of my country's social economy and industrial production level, the scale of sewage treatment continues to increase, and the output of excess sludge has further increased, but there are still many shortcomings in the treatment of sludge. The current common treatment process is concentration, dehydration and digestion. This treatment method is cumbersome and expensive. Thin-layer sludge drying, as a new type of sludge mechanical dehydration method, can reduce the moisture content of sludge to less than 50%, but there is a lack of pretreatment measures to stabilize and reduce sludge, resulting in sludge resources The degree of utilization is low. Contents of the invention [0003] In order to overco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02C02F11/06C02F11/122C02F11/13C02F11/148
CPCC02F11/06C02F11/02C02F11/122C02F11/13C02F11/148
Inventor 李磊马艳张鑫周新宇
Owner SHANGHAI MUNICIPAL WATER RESOURCES DEV & UTILIZATION NAT ENG CENT
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