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Preparation of amino acids and separation of CO from biogas slurry and straw hydrolyzate 2 systems and methods

A hydrolyzate, amino acid technology, applied in microorganism-based methods, methods of supporting/immobilizing microorganisms, methods of sterilization, etc., can solve problems such as high COD, secondary environmental pollution, and difficult to deal with waste.

Active Publication Date: 2017-04-12
HUAZHONG AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Biogas slurry is a waste liquid with high ammonia nitrogen and high COD (Chemical Oxygen Demand, chemical oxygen demand) produced during the biogas fermentation process. Although it can be used as fertilizer to irrigate crops, a large amount of excess biogas slurry has become a waste that is difficult to treat. Very easy to cause secondary pollution of the environment

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  • Preparation of amino acids and separation of CO from biogas slurry and straw hydrolyzate <sub>2</sub> systems and methods

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0035] Such as figure 1 The shown biogas slurry and straw hydrolyzate for the preparation of amino acids and the separation of CO 2 The system includes biogas engineering fermentation equipment 1, biogas slurry precipitation equipment 2, biogas slurry centrifugal equipment 4, stirring fermentation equipment 5, first filter 6, straw saccharification reaction equipment 7, straw washing equipment 8, straw pretreatment reactor 9 , suspended fermentation liquid centrifugal equipment 11, biogas slurry liquid storage tank 12, yeast hydrolysis reactor 13, second filter 14, yeast hydrolyzate concentration equipment 15, amino acid salt reactor 16, CO 2 Absorption equipment 17, three-way valve 19, rich liquid desorption equipment 22, purified gas storage tank 24, it also includes the first delivery pump 3, the second delivery pump 10, the third delivery p...

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Abstract

The invention discloses a system and a method for utilizing biogas slurry and straw hydrolysate to prepare an amino acid and separate CO2. In the system and the method, the straw hydrolysate and the biogas slurry are utilized for candida fermentation, a composite amino acid is obtained after yeast hydrolysis, the composite amino acid is neutralized through KOH to generate a composite amino acid salt which is relatively low in cost, the composite amino acid salt is applied to CO2 absorption and separation, and an amino acid salt solution rich in CO2 and the biogas slurry after fermentation are mixed according to a certain proportion to be applied to agricultural production. By the system and the method, the defect that conventional chemical absorbents are large in degradation loss and high regeneration energy consumption is avoided effectively, most ammonia nitrogen in the biogas slurry is removed, nutritional ingredient content in the biogas slurry is increased, the biogas slurry is enabled to be easier to treat and use, and win-win effect in the aspects of energy resource and environment is realized.

Description

technical field [0001] The invention relates to biogas engineering and CO 2 The technical field of absorption and separation integration, specifically refers to a method of preparing amino acids from biogas slurry and straw hydrolyzate and separating CO 2 systems and methods. [0002] technical background [0003] At present, biogas, landfill gas and biomass pyrolysis gas are rich in CO 2 CO in gas 2 Separation technologies mainly include chemical absorption method, physical adsorption method, membrane separation technology, etc. Among them, chemical absorption method is the most mature technology and the most widely used in engineering. CO 2 The chemical absorption method has CO 2 It has the advantages of high separation efficiency and less target gas loss during the separation process. Such as the separation of CO in biogas 2 CH 4 As the target gas, it has the advantages of wide adaptability to gas partial pressure, simple operation and wide commercial application, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12M1/40C12M1/34C12M1/12C12M1/107C12M1/02C12M1/00C12P13/00C05F7/00C05D7/00C05G1/00C12R1/72
CPCC05D7/00C05F7/00C12M21/04C12M21/18C12M23/58C12M27/02C12M41/00C12M41/12C12M41/26C12M45/04C12M45/09C12M47/06C12P13/00C05C11/00Y02A40/20Y02E50/30Y02W30/40
Inventor 晏水平王文超贺清尧张衍林艾平王媛媛袁巧霞
Owner HUAZHONG AGRI UNIV
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