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Method and system for treating waste gas containing ammonia and methane

A technology for treating gas and waste gas, applied in chemical instruments and methods, separation methods, air quality improvement, etc., can solve problems such as efficient removal of NH, and achieve the effect of improving removal efficiency, stabilizing waste gas purification rate, and ensuring waste gas purification rate.

Active Publication Date: 2019-12-24
HEBEI AGRICULTURAL UNIV.
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the inability to efficiently remove NH at the same time in the prior art when biological methods are used to treat waste gas from livestock and poultry breeding 3 and CH 4 problem, the present invention provides a method and system for treating waste gas containing ammonia and methane

Method used

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  • Method and system for treating waste gas containing ammonia and methane

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Effect test

Embodiment 1

[0048] The system used in the embodiment of the present invention to deal with waste gas containing ammonia and methane, such as figure 1 As shown, it includes an induced draft fan 10, a first biological trickling filter tower 11 connected to the fan, a first nutrient solution storage tank 12 arranged at the bottom of the first biological trickling filter tower 11 and communicating with the bottom of the first biological trickling filter tower 11, The second biological trickling filter tower 13 connected to the gas outlet of the first biological trickling filter tower 11, the second nutrient solution storage tank 14 that is arranged at the bottom of the second biological trickling filter tower 13 and communicates with the bottom of the second biological trickling filter tower 13, The air outlet of the second biological trickling filter tower 13 is provided with a suction fan 17 .

[0049] Wherein, the liquid outlet of the first nutrient solution storage tank 12 is connected wi...

Embodiment 2

[0072] The first bio-trickling filter tower and the second bio-trickling filter tower packing are replaced by Bacillus aerobic denitrifying bacteria, and the rest are the same as in Example 1. The operating results show that the first Biotrickling filter 11 on NH 3 The purification efficiency can reach 90-92% stably, and the second biological trickling filter tower 13 is for CH 4 The purification efficiency can reach 85-87% stably, NO in the second nutrient solution storage tank 14 3 - and concentration of NO 2 - The concentration is 3.5-4.9mg / L.

Embodiment 3

[0074] The CuFe-LDHs modified zeolite in the first biological trickling filter tower and the second biological trickling filter tower filler is replaced by ZnFe-LDHs modified zeolite of equal content, and the rest are the same as in Example 1. The operation results show that the first biological Trickling filter 11 on NH 3 The purification efficiency can reach 91-93% stably, the second biotrickling filter tower 13 for CH 4 The purification efficiency can reach 85-86% stably, and the NO in the second nutrient solution storage tank 14 3 - and concentration of NO 2 - The concentration is 2.2-3.4mg / L.

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Abstract

The invention particularly discloses a method and a system for treating waste gas containing ammonia and methane. The method comprises the following steps: introducing waste gas containing ammonia andmethane into a first biotrickling filter tower, meanwhile spraying a nutrient solution onto filler of the first biotrickling filter tower, and removing ammonia gas in the waste gas to obtain treatedgas and first leacheate; introducing the treated gas into a second bio-trickling filter tower, meanwhile spraying the first leacheate onto a filler of the second bio-trickling filter tower along witha nutrient solution, carrying out methane oxidation and denitrification treatment to obtain purified waste gas and a second leacheate, and spraying the second leacheate onto the filler of the first bio-trickling filter tower along with the nutrient solution. In the method, methane oxidizing bacteria and aerobic denitrifying bacteria are loaded in the filler of the second bio-trickling filter. According to the treatment method provided by the invention, methane and ammonia gas are efficiently and thoroughly removed at the same time, the purification efficiency of the ammonia gas can reach 90-98%, the purification efficiency of the methane can reach 85-90%, and no NO3<-> or NO2<-> is accumulated in a nutrient solution.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to a method and system for treating waste gas containing ammonia and methane. Background technique [0002] In recent years, NH in the atmosphere 3 and CH 4 The rapid growth of concentration has attracted the attention of governments and scientists of various countries. Livestock and poultry farming is NH 3 and CH 4 Significant sources of emissions from livestock and poultry farming NH in the US and EU 3 Emissions accounted for 56% and 74% of the total emissions respectively, and the NH of livestock and poultry farming in my country 3 Emissions account for atmospheric NH 3 54% of total emissions. Therefore, focus on the development of livestock and poultry farming NH 3 and CH 4 The research on coordinated emission reduction of exhaust gas has become the frontier and hot spot in the field of ecological environment research. Achieve NH 3 and CH 4 Coordinated em...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/84B01D53/58B01D53/72
CPCB01D53/58B01D53/72B01D53/84Y02A50/20
Inventor 刘春敬高志岭高雪晴范玉婧郑董兴
Owner HEBEI AGRICULTURAL UNIV.
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