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Method for removing volatile organic malodorous substances from biogas slurry by using extraction method

A volatile organic and extraction technology, which is applied in the field of waste resource utilization, can solve the problems of loss of nutrient elements, non-specific adsorption of porous solid substances, slow chemical reaction speed, etc., and achieve the effect of low cost.

Inactive Publication Date: 2012-12-12
JILIN AGRICULTURAL UNIV
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

The disadvantage of this type of method is that the adsorption of these porous solid substances is not specific. If it is used in the deodorization of biogas slurry, it will inevitably cause the loss of nutrients while adsorbing odorous substances.
[0007] 3. Chemical conversion treatment: Use some chemical reagents to convert odorous substances into other compounds. However, the substances that can chemically transform volatile organic compounds such as benzene series and esters are mostly strong acids, strong alkalis or strong oxidizing substances. These substances will inevitably change the chemical properties of the biogas slurry and affect the fertilizer efficiency of the biogas slurry, and the chemical reaction speed of volatile organic compounds such as benzene series and esters is relatively slow

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  • Method for removing volatile organic malodorous substances from biogas slurry by using extraction method
  • Method for removing volatile organic malodorous substances from biogas slurry by using extraction method
  • Method for removing volatile organic malodorous substances from biogas slurry by using extraction method

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specific Embodiment approach 1

[0024] Specific implementation mode one: the specific implementation mode of the method of the present invention is as follows: figure 1 , figure 2 This embodiment will be described.

[0025] The biogas slurry was obtained from the biogas station in Jiutai City, Jilin Province, and the main fermentation raw material was cow dung.

[0026] a. Chloroform extraction: Mix the biogas slurry and chloroform with a volume ratio of 12:1 from which the slag-like substances have been removed, and then put it into a closed container (in order to ensure sufficient oscillation space, the volume of the container should be equal to that of the biogas slurry and chloroform. 2-3 times the total volume, preferably glass material), vibrate the container for 30 minutes in a reciprocating or revolving manner, transfer the liquid in the container to the liquid separator, and let it rest for 2 hours to make it layered and complete The first extraction; after the liquid is static and separated, the...

specific Embodiment approach 2

[0038] The specific implementation method of the method of the present invention is as follows: image 3 , Figure 4 This embodiment will be described.

[0039] The biogas slurry was taken from No. 13 Village, Gongpeng Town, Yushu City, Jilin Province, and the main fermentation raw material was chicken manure.

[0040] a. Chloroform extraction: Mix the biogas slurry and chloroform with a volume ratio of 15:1 after removing the slag-like substances, and then put it into a closed container (in order to ensure sufficient oscillation space, the volume of the container should be equal to that of the biogas slurry and chloroform. 2-3 times the total volume, preferably glass material), vibrate the container for 30 minutes in a reciprocating or revolving manner, transfer the liquid in the container to the liquid separator, and let it rest for 2 hours to make it layered and complete The first extraction; after the liquid is static and separated, the lower liquid is discarded, and the u...

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Abstract

The invention discloses a method for removing volatile organic malodorous substances from biogas slurry by using an extraction method and belongs to the technical field of waste resource utilization. On the premise that components of the biogas slurry are not changed and the fertilizer efficiency of the biogas slurry are not influenced, the volatile organic malodorous substances are removed from the biogas slurry, so early technical support can be supplied to production of a liquid fertilizer in which the biogas slurry is used as a primary raw material. The method comprises the following steps of: a, extracting chloroform; and b, extracting petroleum ether. The biogas slurry is treated by using the method; the biogas slurry almost has no peculiar smell; the content of the volatile organicmalodorous substances, such as benzene series, esters and the like, of the biogas slurry is reduced to 12.6 percent of the content of the volatile organic malodorous substances before treatment; and the removal effect is obvious.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of waste, and in particular relates to a method for removing volatile organic malodorous substances in biogas slurry by using an extractant. Background technique [0002] The treatment of high-concentration organic waste (livestock and poultry manure, organic waste, straw, etc.) by biogas fermentation technology will produce a large amount of biogas slurry, which is rich in macronutrients such as nitrogen, phosphorus, potassium, and trace elements such as copper and zinc. These nutrients are It exists in the state of quick-acting nutrients, so the biogas slurry has strong quick-acting nutrient capacity and high nutrient availability. It is a rare multi-component quick-acting liquid fertilizer. Biogas slurry has good effects in seed soaking and crop cultivation, and has been recognized by many scholars and farmers. [0003] However, there are a large amount of slag-like substances and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/02C02F1/26
Inventor 王玉军窦森卢振兰侯志广王呈玉马秀兰王志英张岩冯连双李艳
Owner JILIN AGRICULTURAL UNIV
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