Biogas slurry pretreatment method

A pretreatment, biogas slurry technology, applied in filtration treatment, water/sewage treatment, chemical instruments and methods, etc., can solve problems such as polluted soil, and achieve the effect of increasing absorption and utilization, increasing carbon content, and avoiding damage

Inactive Publication Date: 2019-09-06
周宇强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problem that the direct use of biogas slurry is easy to cause and pollute the soil, the present invention provides a biogas slurry pretreatment method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The preparation method of the mixture is:

[0031] A. The tourmaline powder, solvent, and dispersant are ultrasonically dispersed according to the mass ratio of 7:19-22:1, and 10-15% of the tourmaline powder mass is added with tetrabutyl titanate, heated to 90℃, stirred for 1h, and left to stand 2h, filter, dry, calcine at 200~230℃ for 80min, collect the calcination;

[0032] B. Mix the calcined material and quartz sand at a mass ratio of 8:2~5, collect the mixture, stir the mixture, water and polyglutamic acid at a mass ratio of 4~6:20:1~3, spray dry and collect Dry matter

[0033] C. Ball mill the dried substance and surfactant at a mass ratio of 13-15:1, and collect the ball-milled mixture to obtain the mixture.

[0034] The surfactant is a mixture of sodium dodecylbenzene sulfonate and lecithin in a mass ratio of 4:1 to 3.

[0035] The additive is a mixture of formaldehyde and starch in a mass ratio of 4-9:5.

[0036] The auxiliary agent is azobisisobutyronitrile and 3-amino...

Embodiment 1

[0043] The mixed acid is a mixture of 0.3 mol / L hydrochloric acid and 0.1 mol / L nitric acid solution in a volume ratio of 5:2.

[0044] The stone material is mixed with pebbles, vermiculite and mixed acid in a mass ratio of 4:2:10, allowed to stand, filtered, washed, and dried to obtain stone material.

[0045] The solvent is made by mixing N,N-dimethylformamide and ethanol solution in a volume ratio of 1:6.

[0046] The dispersant is Span-80.

[0047] The preparation method of the mixture is:

[0048] A. The tourmaline powder, solvent, and dispersant are ultrasonically dispersed at a mass ratio of 7:19:1, and 10% by mass of tourmaline powder is added with tetrabutyl titanate, heated to 90°C, stirred for 1h, left for 2h, filtered, Dry, calcinate at 200°C for 80 minutes, and collect the calcined material;

[0049] B. Mix the calcined material and quartz sand at a mass ratio of 8:2, collect the mixture, stir the mixture, water and polyglutamic acid at a mass ratio of 4:20:1, spray dry, an...

Embodiment 2

[0060] The mixed acid is a mixture of 0.3 mol / L hydrochloric acid and 0.1 mol / L nitric acid solution in a volume ratio of 5:2.

[0061] The stone material is mixed with pebbles, vermiculite and mixed acid at a mass ratio of 4:4:10, allowed to stand, filtered, washed, and dried to obtain stone material.

[0062] The solvent is made by mixing N,N-dimethylformamide and ethanol solution in a volume ratio of 1:7.

[0063] The dispersant is Span-80.

[0064] The surfactant is a mixture of sodium dodecylbenzene sulfonate and lecithin in a mass ratio of 4:2.

[0065] The preparation method of the mixture is:

[0066] A. The tourmaline powder, solvent, and dispersant are ultrasonically dispersed according to the mass ratio of 7:20:1, and 13% of the tourmaline powder mass is added with tetrabutyl titanate, heated to 90°C, stirred for 1h, left for 2h, filtered, Dry, calcinate at 220°C for 80 minutes, and collect the calcined material;

[0067] B. Mix the calcined material and quartz sand at a mass ...

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PUM

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Abstract

The invention relates to a biogas slurry pretreatment method, and belongs to the technical field of environment protection. Biogas slurry is mixed with a mixture first, through tourmaline powder in the mixture, under the lighting action, more negative ions are released, substances in the biogas slurry are purified, and the activity of the biogas slurry is improved; by using quartz sand, a primaryfiltration effect can be achieved, insoluble substances in the biogas slurry are removed, and then a reaction is carried out by adding acrylamide and an additive; cellulose in the biogas slurry is used to be grafted with the acrylamide and bonded with tannin, and heavy metal ions in the biogas slurry are flocculated and settled; a monomer can reduce excessive nutrient substances in the biogas slurry, the cellulose, the heavy metal ions and part of the excessive nutrient substances in the biogas slurry are thus removed, and the biogas slurry is further adjusted; finally, the biogas slurry is treated by using stone, and the bioactivity of the biogas slurry is further improved; through a trace amount of the additive, part of the carbon content can be increased, and nutrition is balanced.

Description

Technical field [0001] The invention relates to a pretreatment method for biogas slurry and belongs to the technical field of environmental protection. Background technique [0002] Generally speaking, biogas slurry is the fermented material of livestock and poultry excrement, which contains a large number of essential nutrients for plant growth. The traditional method of biogas slurry treatment is to treat wastewater in the environmental protection field as wastewater, and then apply it to agriculture, directly use it as a base fertilizer, or use biogas slurry for power generation. However, these three treatment methods currently have big problems. As wastewater treatment, the water contains a large amount of colloids and is easy to adhere to the sludge. The high ammonia nitrogen content also leads to unstable treatment effects, and the wastewater is difficult to treat to meet the discharge standards. In the case of crop base fertilizer, because the amount of water in the bioga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F101/20C02F101/30
CPCC02F1/00C02F1/001C02F1/02C02F1/285C02F1/54C02F1/68C02F9/00C02F2101/20C02F2101/30
Inventor 周宇强
Owner 周宇强
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