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Sludge drying odor treatment method and device

A technology for sludge drying and treatment methods, applied in chemical instruments and methods, separation methods, air quality improvement, etc., can solve problems such as increased operating costs, secondary pollution, and difficult long-term operation of biological washing tanks.

Active Publication Date: 2021-06-08
广东省南方环保生物科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biological scrubber needs pollutants in the exhaust gas to reach a certain concentration to maintain the survival of the activated sludge in the scrubber, but the concentration of odor pollutants produced by general municipal sewage plants is not enough to supply microorganisms to make them grow fully, making the biological scrubber difficult to last operation, and the aeration regeneration process of the regeneration reaction tank inevitably causes some of the adsorbed and absorbed pollutants to be blown off again and released into the atmospheric environment, resulting in secondary pollution
Biological trickling filters generally need to be equipped with nutrient solution storage tanks, and nutrients are regularly added to the trickling filtrate to maintain the growth of microorganisms in the trickling filter, which will obviously increase the operating cost

Method used

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  • Sludge drying odor treatment method and device

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Embodiment 1

[0034] like figure 1 As shown, this embodiment discloses a sludge drying and odor treatment device, which is used in conjunction with a sewage treatment system, and mainly includes a biological washing tank 1, a biological trickling filter tank 2, a fan 13, a pre-cooling and dust removal device 14 and supporting Piping, pumps, valves and control systems.

[0035] Among them, the sewage treatment system includes a pretreatment area, anoxic tank, aerobic tank, secondary sedimentation tank, dehydration machine room and sludge drying machine connected in sequence. The aerobic tank is also connected to the anoxic tank through a return pipe.

[0036] A washing spray device 3 , a washing packing layer 4 and a washing liquid collection area 5 are sequentially arranged in the biological washing tank 1 from top to bottom. Wherein, the filler of the washing filler layer 4 is a hollow polyhedron plastic ball with a diameter ranging from 3 to 5 cm and a specific surface area of ​​200 to 3...

Embodiment 2

[0045] This embodiment discloses a sludge drying and odor treatment method, which is implemented based on the device in Embodiment 1, and specifically includes:

[0046] The high-concentration sulfur-containing and nitrogen-containing odor generated during the sludge drying process is collected and processed by the pre-cooling and dust removal device 14, and then driven by the fan 13, enters the biological washing tank 1 through the air inlet 6 of the biological washing tank, It passes through the washing packing layer 4 from bottom to top, and enters the biological trickling filter 2 through the gas outlet 7 of the biological washing tank and the air inlet 11 of the biological trickling filter in sequence.

[0047] The mud-water mixture in the front section of the aerobic tank is pumped by the washing spray pump to the washing spray device 3 on the top of the biological washing tank 1, sprayed from top to bottom through the nozzle, and forms countercurrent contact with the odo...

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Abstract

The invention discloses a sludge drying odor treatment method and device. The method comprises the following steps that high-concentration sulfur-containing and nitrogen-containing odor generated in a sludge drying process firstly enters a biological washing tank, most of nitrogen-containing pollutants and part of volatile organic pollutants in the odor are adsorbed and degraded, and the primarily purified odor enters a biological trickling filter; sulfur-containing pollutants and residual volatile organic pollutants in the odor are adsorbed, absorbed and degraded by microorganisms attached to and growing on the surface of the filler, the odor is discharged after being fully purified, spraying liquid of the biological washing tank comes from mud-water mixed liquid of the sewage aerobic tank, washing liquid obtained after reaction is discharged into the sewage anoxic tank at the upstream of the sewage aerobic tank, and the sewage anoxic tank is discharged into the sewage anoxic tank at the upstream of the sewage aerobic tank, wherein the spraying liquid of the biological trickling filter comes from effluent of the sewage secondary sedimentation tank; and the filtrate falling through the trickling filter filler layer is discharged into the sewage aerobic tank. Sludge drying odor treatment and sewage treatment are fully combined, the odor purification effect is improved under the condition that the sewage treatment effect is not affected, and the investment and operation cost is reduced.

Description

technical field [0001] The invention relates to the field of waste treatment, in particular to a method and device for treating odor from sludge drying. Background technique [0002] The application of thermal sludge drying technology in sewage plants is becoming more and more common, and the treatment of odor generated in the process of sludge drying has always been a research hotspot in the industry. The odor not only has a high concentration of pollutants, but also has complex components. According to literature research, the main pollutants of the odor produced by sludge drying are ammonia (NH 3 , 89%), aldehydes and ketones (A&K, 4%), methyl mercaptan (Me-SH, 3%), volatile fatty acids (VFA, 2%), hydrogen sulfide (H 2 S, 1%), alcohols (Alcohols, 1%), the main odor-causing components are methyl mercaptan, trimethylamine, ammonia, methyl sulfide, hydrogen sulfide, ethanethiol, aldehydes and ketones. In addition, problems such as high temperature and high dust content hav...

Claims

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Application Information

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IPC IPC(8): B01D53/85B01D53/75B01D53/48B01D53/54
CPCB01D53/85B01D53/75B01D53/48B01D53/54Y02A50/20
Inventor 郑理慎祝雅杰宋旭陈志平
Owner 广东省南方环保生物科技有限公司
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