A method for nitrogen fixation using organic wastewater for anaerobic fermentation of straw

An organic waste water and anaerobic fermentation technology, applied in the field of comprehensive utilization of resources, can solve the problems of insufficient nitrogen source, unable to ferment gas production normally, waste of resources, etc., and achieve the effects of simple process, avoiding pollution and damage, and simple method.

Inactive Publication Date: 2011-12-21
HENAN AGRICULTURAL UNIVERSITY
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, straw is a carbon-rich biomass, and straw biogas fermentation microorganisms need a certain amount of nitrogen source to complete their own growth and metabolism in the process of anaerobic fermentation. Fermentation of pure straw often causes acid drowning due to lack of nitrogen source and cannot be normal. Fermentation gas
In order to make up for the lack of nitrogen source in straw, currently straw biogas fermentation project...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for nitrogen fixation using organic wastewater for anaerobic fermentation of straw
  • A method for nitrogen fixation using organic wastewater for anaerobic fermentation of straw

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The test uses the waste water produced by the malt sugar factory as a sample, part of which is used as a nutrient substrate for photosynthetic bacteria after being sterilized by ultraviolet light, and part of which is used as an air deoxygenation medium.

[0018] Deoxygenation reactors, such as figure 1 As shown, it includes a shell 1, the bottom of the shell 1 is provided with an aerator 2, the inlet of the aerator 2 is connected to the air intake pipe 3, and the inner wall of the shell 1 above the aerator 2 is vertically spaced and staggered. Inclined and upwardly inclined baffles 4, there is a gap between the far end of the baffles 4 and the inner wall of the opposite housing 1; the top of the housing 1 is provided with a shower 5, and the inlet of the shower 5 passes through the circulation pipe 6 It is connected to the bottom of the housing 1, and the inlet of the circulation pipe 6 is provided with a circulation pump 7. During operation, the circulation pump 7 cir...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of comprehensively utilization of sources and in particular relates to a method for performing nitrogen fixation for straw anaerobic fermentation by utilizing organic wastewater. The method comprises the following steps: using a nitrogen product, which is obtained through performing deoxygenation on air by use of a deoxidation reactor, as an initial nitrogen source; (2) inoculating photosynthetic bacteria in organic wastewater, performing illuminating culture in the nitrogen atmosphere, centrifuging the cultured liquid, taking the supernatant, namely an organic nitrogen product; and (3) inactivating the organic nitrogen product to be used as the nitrogen source, and adding the nitrogen source into straw to perform anaerobic fermentation. In themethod, photosynthetic bacteria are utilized to ensure that the nitrogen fixation function of the nitrogenase of nutrients in the organic wastewater is utilized to convert the nitrogen in the air to bacterial protein and bacterial pigment under anaerobic and illuminating conditions, thus the elemental nitrogen in the air is converted and fixed in an organic state, then the nitrogen is used as thenitrogen source to be supplied in a straw anaerobic fermentation process, the organic wastewater can be utilized again and the pollutions and damages caused by the direct discharge of the organic wastewater can be avoided.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of resources, and in particular relates to a method for using organic waste water to fix nitrogen for anaerobic fermentation of straw. Background technique [0002] my country is a large agricultural country with rich straw resources. However, with the rapid development of economy, crop straws, which were originally used as energy for rural life and livestock feed, have gradually become agricultural wastes, and their improper disposal has caused serious environmental pollution. In recent years, with the shortage of fossil energy supply and the increasingly prominent environmental problems, biomass energy based on straw has become an important technical method for subsequent energy development. Among various biomass energy technologies, straw biogas fermentation can not only convert straw into clean gas energy, but the fermented product can also be used as organic fertilizer to re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C12P5/02C02F3/30
CPCY02W10/37
Inventor 李刚岳建芝郭前辉
Owner HENAN AGRICULTURAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap