Method for separating biological medicine fertilizer effective component from biogas fluid

A biomedical fertilizer and active ingredient technology, applied in the field of chemical engineering, can solve the problems of loss of active ingredients, high energy consumption, etc.

Inactive Publication Date: 2008-09-24
ZHEJIANG FORESTRY UNIVERSITY
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  • Abstract
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  • Claims
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Problems solved by technology

The concentration technology used mostly adopts conventional low-temperature evaporation technology, which causes some active ingredients to be lost and consumes a lot of energy.

Method used

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  • Method for separating biological medicine fertilizer effective component from biogas fluid

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Embodiment Construction

[0013] Below in conjunction with the accompanying drawings of the description, the technical method for separating the active ingredients of biomedicine fertilizer from the biogas slurry by the membrane separation technology of the present invention is described in detail, as shown in the accompanying drawings of the description:

[0014] Pretreatment first, including sedimentation, sand filtration, security filtration, and ultrafiltration, aims to remove large particles with a molecular weight above 100,000, microorganisms, and reduce conductivity. After the biogas slurry in the biogas digester is settled to remove larger suspended solids, it enters the biogas slurry tank for storage, and the biogas slurry in the biogas slurry tank enters the primary sand filter tank (filled with activated carbon and quartz sand) through the feed pump. The secondary sand filter (filler is quartz sand), and then enters the ultrafiltration membrane separator for filtration after two-stage securi...

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Abstract

The present invention provides a method used for separating the effective ingredients of biological medicine fertilizer from biogas slurry. At first, the biogas slurry is pre-treated through sedimentation, sand filtration, safety filtration, and filtration and separation by a ultrafiltration membrane; the ultrafiltration membrane permeate liquid is separated by a nanofiltration membrane under the pressure of 0.9 to 1.1MPa; the substance of molecular weight of 200 to 100,000 is blocked and is used as one raw material that is used for preparing the biological medicine fertilizer; the ultrafiltration membrane permeate liquid is filtered and separated by a reverse osmosis membrane under the pressure of 1.2 to 1.5MPa; the substance except water is blocked and is used as one raw material that is used for preparing the biological foliar fertilizer. In the method, the membranes of different grades are used; the separation and the condensation are conducted in different steps according to the molecular weight of effective ingredients in the biogas slurry; the secondary pollution brought by the discharge of the biogas slurry is eliminated; and the method provides raw materials and formulas of the bio-fertilizer and the biological medicine fertilizer for the pollution-free ecological agriculture, and improves the economic value of the biogas slurry by times.

Description

technical field [0001] The invention relates to a technical method for separating and concentrating active ingredients of biomedicine fertilizers from biogas slurry by a combined membrane process, and belongs to the technical field of chemical engineering. Background technique [0002] Biogas slurry is the effluent of the biogas digester, which contains a variety of animal and plant nutrients. Conventional nutrients include nitrogen, phosphorus, potassium, magnesium and calcium; active organic ingredients include humic acid, various plant hormones (indole acetic acid, gibberellin, cytokinin), B vitamins (B1, B2, B5, B6, B11, B12), various amino acids, proteins, various hydrolases, etc.; there are also various inorganic acids and some antibiotics. [0003] The use of biogas slurry as organic fertilizer in general farms has been popularized, and almost all farmers with biogas digesters use biogas slurry as fertilizer. After research, biogas slurry can not only be used as org...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F5/00
CPCY02E50/343Y02A40/20Y02E50/30Y02W30/40
Inventor 宋成芳张妙仙单胜道韩瑾曹辉
Owner ZHEJIANG FORESTRY UNIVERSITY
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