Method and system for producing anaerobic biogas slurry concentrated fertilizer

Abstract

The invention discloses a method and a system for producing an anaerobic biogas slurry concentrated fertilizer. Sewage is filtered by a grillage machine, then is collected into a water collecting tank, and is pumped into a solid-liquid separator, the quality and quantity of treated sewage are balanced and adjusted in an adjusting tank, then the sewage enters a CSTR device and is subjected to anaerobic fermentation, generated biogas is recycled, generated biogas slurry is discharged into a sediment pool and precipitates, the settled biogas slurry is pumped back to the CSTR device through a sludge reflux pump for circular treatment, and sludge accumulated in the sediment pool and an MBR device is periodically discharged into a sludge biogas residue pool and is subjected to squeezing composting; a biogas slurry penetrating fluid separated by the MBR device is concentrated by a DTRO membrane device, and a clear fluid separated from the anaerobic biogas slurry by the DTRO membrane device iscollected into a second water production tank and is discharged after reaching the standard through detection; and trace elements, other nutritional ingredients and functional ingredients are added into the separated concentrated solution to prepare the liquid fertilizer, and the liquid fertilizer is sub-packaged. The problems of high biogas slurry yield, high treatment cost, difficult storage and transportation, low nutrient content and the like in the traditional anaerobic engineering are solved, and the anaerobic biogas slurry is better recycled.

Description

technical field [0001] The invention relates to the field of anaerobic biogas slurry production and preparation of concentrated fertilizer, in particular to a production method and system for anaerobic biogas slurry concentrated fertilizer. Background technique [0002] Biogas slurry is the residue produced by anaerobic fermentation of organic waste such as human and animal manure and crop straw in a biogas digester. It is a high-quality organic fertilizer. The biogas slurry contains various elements such as nitrogen, phosphorus, potassium, magnesium and calcium. The active organic components include plant hormones such as humic acid, indole acetic acid, lactic acid bacteria, gibberellin and cytokinin, and B vitamins. Amino acids, proteins, hydrolytic enzymes and organic molecules such as various inorganic acids and some antibiotics, but the content of active ingredients in biogas slurry is relatively low, there is not enough farmland around the waste treatment project, and t...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method and system for producing concentrated anaerobic biogas slurry fertilizer to solve the problems of

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