Aerobic fermentation waste gas biotreatment method

A technology of aerobic fermentation and biological treatment, applied in separation methods, chemical instruments and methods, air quality improvement, etc., can solve problems such as poor treatment effect and environmental pollution

Inactive Publication Date: 2019-04-05
自贡佳鑫农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a biological treatment method for aerobic fermentation waste gas in order to solve the problem of environmental pollution caused by waste gas produced in the solid aerobic fermentation process due to poor treatment effect

Method used

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  • Aerobic fermentation waste gas biotreatment method

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Effect test

Embodiment 1

[0028] A biological treatment method for aerobic fermentation waste gas, comprising the following steps:

[0029] (a) Cooling and cooling: the aerobic fermentation waste gas from the aerobic fermentation tank is pressurized by a fan, the pressure of the cooling tower is controlled to be 5-10KPa, and the temperature drops to 45°C after entering the air heat exchanger for heat exchange, and then Pass into the cooling tower and use spray liquid for spray cooling, the exhaust gas flow rate is 1.5-2m / s, and the waste gas stays in the cooling tower for 4-6s; the gas-liquid volume ratio in the cooling tower is 25:1; after cooling The temperature of the aerobic fermentation waste gas is 25-30°C, and the liquid obtained after spraying is transported to the biological deodorization tower; the spray liquid is biogas slurry produced by aerobic fermentation, and the liquid level of the cooling tower is controlled to be 1 / 2-2 / 3 liquid level height.

[0030] (b) Biological deodorization: t...

Embodiment 2

[0033] A biological treatment method for aerobic fermentation waste gas, comprising the following steps:

[0034] (a) Cooling and cooling: the aerobic fermentation waste gas from the aerobic fermentation tank is pressurized by a fan, the pressure of the cooling tower is controlled to be 5-10KPa, and the temperature drops to 40°C after being passed into the air heat exchanger for heat exchange, and then Pass into the cooling tower and use spray liquid for spray cooling, the exhaust gas flow rate is 1.5-2m / s, and the waste gas stays in the cooling tower for 4-6s; the gas-liquid volume ratio in the cooling tower is 30:1; after cooling The temperature of the aerobic fermentation waste gas is 25-30°C, and the liquid obtained after spraying is transported to the biological deodorization tower; the spray liquid is organic waste liquid produced after anaerobic fermentation, and the liquid level of the cooling tower is controlled It is 1 / 2-2 / 3 liquid level height.

[0035](b) Biologic...

Embodiment 3

[0038] A biological treatment method for aerobic fermentation waste gas, comprising the following steps:

[0039] (a) Cooling and cooling: the aerobic fermentation waste gas from the aerobic fermentation tank is pressurized by a fan, the pressure of the cooling tower is controlled to be 5-10KPa, and the temperature drops to 42°C after being passed into the air heat exchanger for heat exchange, and then Pass into the cooling tower and use spray liquid for spray cooling, the exhaust gas flow rate is 1.5-2m / s, and the time for the exhaust gas to stay in the cooling tower is 4-6s; the gas-liquid volume ratio in the cooling tower is 27:1; after cooling The temperature of the aerobic fermentation waste gas is 25-30°C, and the liquid obtained after spraying is transported to the biological deodorization tower; the spray liquid is organic waste liquid produced after anaerobic fermentation, and the liquid level of the cooling tower is controlled It is 1 / 2-2 / 3 liquid level height.

[0...

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Abstract

The invention discloses an aerobic fermentation waste gas biotreatment method. The aerobic fermentation waste gas biotreatment method comprises the following steps of (a) inletting aerobic fermentation waste gas from an aerobic fermentation tank into an air exchanger for heat exchange and then into a cooling tower for being spray-cooled by spraying liquid; (b) spraying absorbing liquid onto the upper portion of a biological deodorization tower to perform spray absorption and biological absorption on the aerobic fermentation waste gas and then discharging the aerobic fermentation waste gas fromthe top of the biological deodorization tower; (c) overflowing and laying the waste liquor produced during spray absorption, taking overflowed liquor as the absorbing solution of the biological deodorization tower and returning the overflowed and layered solid-liquid mixture to a biogas generating system. According to the aerobic fermentation waste gas biotreatment method, liquid with much solidcontent which is obtained through cooling and biological deodorization by a layering filter is layered through separating plates, and clear liquid is pumped to the top of the biological deodorizationtower by a deodorization tower circulating pump for spraying as nutrient substance for biological growth. The aerobic fermentation waste gas biotreatment method is simple in structure, biogas liquid produced during aerobic fermentation is applied to treating waste gas produced during aerobic fermentation, and the processed waste gas is discharged when meeting the standards, so that energy preservation and environmental protection can be achieved.

Description

technical field [0001] The invention relates to the technical field of aerobic fermentation, in particular to a treatment method for aerobic fermentation waste gas. Background technique [0002] With the continuous progress of society, the content of organic matter in municipal solid waste continues to increase, and the amount of waste is increasing year by year. How to effectively deal with these domestic wastes is an urgent problem to be solved. At present, the commonly used method is landfill disposal, which not only consumes a lot of manpower and material resources, but also has problems such as occupying land. Composting fermentation is a good solution. Using microbial fermentation to degrade urban organic solid waste and using compost products as fertilizers can solve environmental problems on the one hand and generate economic benefits on the other. [0003] Solid aerobic composting is a process in which aerobic bacteria absorb, oxidize and decompose waste under the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/84B01D53/72B01D53/58B01D53/52B01D53/48
CPCB01D53/48B01D53/485B01D53/52B01D53/58B01D53/72B01D53/84Y02A50/20
Inventor 曹礼铭李非露黄玉梅
Owner 自贡佳鑫农业科技有限公司
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