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Method for extracting humic acid substances from biogas slurry

A technology for humic acid and biogas slurry, which is applied in the field of extracting humic acid substances, can solve the problems of decreased filtration effect and easily polluted ultrafiltration membrane, and achieve the effects of improving efficiency, stabilizing reciprocating movement and improving filtration flux.

Pending Publication Date: 2020-05-08
重庆酷熊科技有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0004] The invention provides a method for extracting humic acid substances from biogas slurry to solve the problem that the ultrafiltration membrane is easily polluted and the filtering effect is reduced in the existing ultrafiltration process

Method used

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  • Method for extracting humic acid substances from biogas slurry
  • Method for extracting humic acid substances from biogas slurry
  • Method for extracting humic acid substances from biogas slurry

Examples

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Embodiment Construction

[0034] The following is further described in detail through specific implementation methods:

[0035] The reference signs in the drawings of the description include: filter cartridge 10, discharge chamber 11, discharge port 12, liquid inlet 13, liquid discharge port 14, ceramic ultrafiltration membrane 15, cleaning ring 16, annular cavity 17, discharge hole 18, cylinder 19, water pump 20, through hole 21, flexible pipe 22.

[0036] A method for extracting humic acids from biogas slurry The parameters of Examples 1-4 are shown in Table 1 below:

[0037] Table 1 is the technological parameter of embodiment 1~4

[0038] Example 1 Example 2 Example 3 Example 4 Hydraulic retention time (h) 2.5 2.5 3 3 Sodium sulfate mass concentration (%) 5 6 8 5 Sodium hydroxide mass concentration (%) 10 9 12 15 Operating pressure (MPa) 1.5 1.2 1.1 1.0

[0039] Taking Example 1 as an example, a method for extracting humic acid substances ...

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Abstract

The invention relates to the technical field of humic acid extraction, and concretely discloses a method for extracting humic acid substances from a biogas slurry. The method comprises the following steps: introducing the biogas slurry into an adsorption tank filled with alkaline anion resin to adsorb humic acid in the biogas slurry by the alkaline anion resin, and separating out other micromolecular organic matters and inorganic salts; putting the alkaline anion resin into a desorption agent solution, and putting ultrasonic equipment into the desorption agent solution to obtain mixed liquid containing humic acid and the desorption agent; enabling the mixed liquid to pass through ultrafiltration membrane equipment, and separating humic acid from the desorption agent solution to obtain thehumic acid product; and adding a coagulant into the desorption agent solution, and filtering to obtain a filtered desorption agent solution which is used for desorption treatment again. The problem ofreduction of the filtering effect, caused by pollution of magnesium salts, calcium salts and other metal salts in biogas slurry to an ultrafiltration membrane in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of humic acid extraction, in particular to a method for extracting humic acid substances from biogas slurry. Background technique [0002] Humic acid is a mixture of natural organic macromolecular compounds, which widely exists in nature. Because humic acid can improve soil structure, promote the formation of aggregates, and coordinate soil water, fertilizer, gas, and heat conditions, it can not only ventilate, but also Water retention, no compaction, and at the same time, it can enhance the soil's ability to retain and supply fertilizers, maintain a strong ability to nourish nutrients, reduce the loss of effective nutrients, provide fertilizers for a long time, improve soil acidity and alkalinity, and reduce the side effects of toxic factors. Currently, it is often used Humic acid can be used as fertilizer. [0003] In recent years, large-scale and medium-sized biogas projects have been carried out in my c...

Claims

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Application Information

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IPC IPC(8): C08H7/00
CPCC08H6/00
Inventor 张巍刘存寿叶光忠梁涛罗金
Owner 重庆酷熊科技有限公司
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