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Biogas liquid rheological property regulator and application in high solid concentrated biogas liquid preparation thereof

A technology of rheology and modifiers, applied in the fields of application, liquid fertilizer, organic fertilizer, etc., can solve the problems of destroying active substances, reducing active ingredients, increasing the cost of biogas slurry treatment, etc., achieving simple process, improving thixotropy, and realizing high The effect of value utilization

Active Publication Date: 2017-09-22
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] It is obvious that after repeated filtration and separation of solid insolubles, the effective components in the biogas slurry are reduced, and the obtained concentrated biogas slurry can effectively inhibit some plant diseases and insect pests, effectively remove heavy metals in the biogas slurry, and Effectively increase the organic matter content in the biogas slurry, but the biogas slurry concentration process may destroy the active substances in the biogas slurry that are beneficial to plant growth, and the fine solid-liquid separation technology will also greatly increase the cost of biogas slurry treatment

Method used

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  • Biogas liquid rheological property regulator and application in high solid concentrated biogas liquid preparation thereof
  • Biogas liquid rheological property regulator and application in high solid concentrated biogas liquid preparation thereof
  • Biogas liquid rheological property regulator and application in high solid concentrated biogas liquid preparation thereof

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preparation example Construction

[0075] According to another aspect of the present invention, there is provided a method for preparing high-solid-phase concentrated biogas slurry, preferably for preparing the above-mentioned concentrated biogas slurry, comprising the following steps:

[0076] Step 1, pre-treating the biogas slurry;

[0077] Step 2, adding a thickener to the treated biogas slurry;

[0078] Step 3, adding mineral fibers to the reaction system in step 2, and mixing to obtain high-solid-phase concentrated biogas slurry.

[0079] Step 1, the biogas slurry is pre-treated.

[0080]The particle size of biogas residue solids in biogas slurry not only affects its existence state in biogas slurry, but also the biogas residue with too large particle size will cause blockage of drip irrigation system in agricultural irrigation. Therefore, pretreatment of the biogas slurry is required, and the pretreatment includes primary filtration and grinding of the biogas slurry. Primary filtration removes large si...

Embodiment 1

[0101] Take 200 g of biogas slurry with a solid content of 10 (mass) %, and treat it with a colloid mill for 30 minutes, so that the particle size of the biogas residue in the biogas slurry is 160-200 mesh. Add 0.4g CMC to it and stir at a high speed of 4500r / min for 30min, then add 0.4gRSM again, keep the stirring speed constant and continue stirring for 90min to obtain 1# concentrated biogas slurry.

[0102] After standing still for 48 hours, the stratification phenomenon did not appear in the 1# concentrated biogas slurry, and after standing still for 168 hours, the water separation rate of the concentrated biogas slurry was 4%.

Embodiment 2

[0104] Take 200 g of biogas slurry with a solid content of 10 (mass) %, and treat it with a colloid mill for 30 minutes, so that the particle size of the biogas residue in the biogas slurry is 160-200 mesh. Add 0.4g CMC to it and stir at a high speed of 4500r / min for 30min, then add 0.8gRSM again, keep the stirring speed constant and continue stirring for 90min to obtain 2# concentrated biogas slurry.

[0105] After standing still for 48 hours, the stratification phenomenon did not appear in the 2# concentrated biogas slurry. After standing still for 168 hours, the water separation rate of the concentrated biogas slurry was 2%.

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Abstract

The invention provides a biogas liquid rheological property regulator and application in high solid concentrated biogas liquid preparation thereof. The rheological property regulator comprises a mineral fiber and a thickener. The rheological property regulator is added to high solid concentrated biogas liquid, and thus the viscosity of the biogas liquid can be improved, the thixotropy of the biogas liquid can be improved, fine biogas residue particles can stably suspend and are not prone to layered settlement and caking, so that the biogas liquid is convenient to store and transport for a long time, and the biogas liquid can be commercially utilized at high value to develop biogas liquid base liquid fertilizer. According to the biogas liquid rheological property regulator and the application in the high solid concentrated biogas liquid preparation thereof, high equipment investment and operation cost needed by technologies such as traditional biogas liquid reverse osmosis membrane concentration can be drastically reduced, the content of the biogas liquid residue particle solid phase with the fertilizer effect in the biogas liquid can be increased, equipment needed by a reverse concentration process is sample, a production method is easy to operate, the cost of biogas liquid concentration is low, and the industrial scale application and promotion can be achieved.

Description

technical field [0001] The invention belongs to the high-value agricultural technical field of concentrated biogas slurry, and relates to a rheological adjustment technology of anaerobic fermentation biogas slurry, a high-stability solid-phase concentrated biogas slurry and a preparation method thereof. Background technique [0002] The livestock breeding industry is an important part of my country's rural economy. With the vigorous development of the intensive livestock breeding industry, the environmental problems caused by livestock and poultry manure have become increasingly prominent, affecting economic development and endangering ecological security. The economical and effective disposal of organic waste represented by livestock and poultry manure, crop straw, grain-based dregs, kitchen waste, activated sludge from sewage plants, etc. has become one of the problems that are widely concerned and urgently needed to be solved. [0003] In recent years, the state has vigor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05F9/04C05G3/00C05G5/27Y02E50/30
Inventor 周风山张涛李阳郭高伟刘悦超崔敬程席诗悦朱夏雷李德华刘芳
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)