A pretreatment process and system for anaerobic digestion of agricultural solid organic waste

A technology for anaerobic digestion and organic waste, applied in biological sludge treatment, biomass pretreatment, waste fuel, etc., can solve the problems of low density, unable to meet the requirements of anaerobic digestion pretreatment, etc., and achieve compact and reasonable design, with Engineering operability, effect of improving heat exchange efficiency

Active Publication Date: 2020-10-02
大连海川博创环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For agricultural solid organic waste, including low-density, refractory cellulosic biomass represented by straw and livestock manure with high sediment content, traditional methods can no longer meet the needs of anaerobic digestion pretreatment

Method used

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  • A pretreatment process and system for anaerobic digestion of agricultural solid organic waste

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Experimental program
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Embodiment 1

[0022] 1. Collect natural air-dried corn stalks, grind them to 1 cm in a grinder, spray biogas slurry to a moisture content of about 60%, and mix evenly for 9 days.

[0023] 2. The feces transported by the chicken farm are poured into the coarse adjustment tank, the gentle slope angle is 15°, and the coarse adjustment and fine adjustment tanks are both 15 cm above the ground. At the same time, add water to the tank, turn on the submerged mixer to mix, and pass steam into the tank to preheat the coarse manure to 35°C;

[0024] 3. Use the laser level gauge to control the amount of water added so that the moisture content of the feces after rough adjustment is 92%;

[0025] 4. After adjusting the moisture content, start the sand scraper to scrape the sand to the sand receiving bucket, and use the sand discharge spiral steel pipe to lift the sand and discharge it to the sand receiving mud tank for transportation;

[0026] 5. After coarse adjustment, the material passes through th...

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Abstract

The invention discloses a pretreatment process and system for anaerobic digestion of agricultural solid organic wastes. The process comprises biomass waste pretreatment, rough regulation of livestockbreeding wastes and fine mixture regulation. The process specifically comprises the following steps: firstly, crushing biomass wastes by utilizing a crusher, and carrying out pre-treatment on an ammoniation pretreatment tank by utilizing biogas slurry; preliminarily adjusting the solid content of wastes transported from a breeding plant in a rough livestock breeding waste regulation tank, separating sediments, and conveying into a fine mixture regulation tank by a pipeline crusher; finally, mixing the pretreated biomass wastes and the roughly regulated wastes, further adjusting the solid content, preheating the mixture into a temperature range needed by anaerobic digestion, and conveying into an anaerobic digestion tank via the pipeline crusher. According to the pretreatment process and system disclosed by the invention, the pretreatment effects of multiple substrates of different density and different properties are improved, various process parameters needed by anaerobic digestion feeding are met, and the system stability is ensured.

Description

technical field [0001] The invention belongs to the field of agricultural solid organic waste treatment and resource utilization, in particular to a pretreatment process and system for anaerobic digestion of agricultural solid organic waste. Background technique [0002] Agricultural solid organic waste includes crop stems, aquatic plants, poultry and livestock manure, tail vegetables, etc. Improper treatment methods will cause a waste of resources and seriously pollute the environment. According to incomplete statistics, my country's annual output of straw is more than 700 million tons, and livestock manure is more than 4 billion tons. Anaerobic digestion technology has been widely concerned and adopted because of its green, environmentally friendly and sustainable characteristics. [0003] The traditional anaerobic digestion technology mainly includes a pretreatment unit, a core anaerobic digestion gas production unit, a fermentation by-product treatment unit, and a gas pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P5/02C12M1/107C02F11/04
CPCC02F11/04C12M21/04C12M45/02C12M45/03C12M45/06C12M45/20C12P5/023Y02E50/30
Inventor 靳文尧徐晓晨杨凤林陈捷
Owner 大连海川博创环保科技有限公司
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