Method for whole-process recycling of multiple biogas slurry components

A whole-process, multi-component technology, applied in chemical instruments and methods, microorganism-based methods, biochemical equipment and methods, etc. Improve yield and return

Inactive Publication Date: 2012-11-28
中国科学院生态环境研究中心鄂尔多斯固体废弃物资源化工程技术研究所
View PDF5 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of high operating cost and low rate of return in the process of resource utilization of biogas slurry, the present invention provides a multi-component whole-process resource recovery method of biogas slurry, which

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
  • Method for whole-process recycling of multiple biogas slurry components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] By detecting and analyzing the concentration of ammonia nitrogen in the biogas slurry, according to the principle of struvite formation, according to the molar ratio of ammonia nitrogen, magnesium ions and phosphate ions at a ratio of 1:1:1, add an appropriate amount of powdered magnesium hydroxide and potassium dihydrogen phosphate After fully stirring and mixing, then stand still for 30 minutes; then add the flocculant PAM to the biogas slurry treated by the struvite precipitation method according to the weight ratio of 0.1%, stir for 10 minutes and mix well, so that the biogas slurry is fully flocculated; The biogas slurry after flocculation is pumped into the plate and frame filter press through the screw pump for solid-liquid separation; the separated biogas residue is fully stirred and mixed by adding peat with high organic matter content and high humic acid content at a weight ratio of 60%. After uniformity, it is granulated by an extrusion granulator and dried by...

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 discloses a method for whole-process recycling of multiple biogas slurry components and belongs to the technical field of environmental protection. The method comprises the following steps of pre-treating biogas slurry by struvite precipitation and flocculation, carrying out solid-liquid separation to obtain biogas residues, carrying out blending, granulation and drying of the biogas residues to obtain organic fertilizer particles satisfying the NY525-2012 ''organic fertilizer'' standard, disinfecting a clear liquid obtained by solid-liquid separation, adding nutrients into the disinfected clear liquid to obtain an alga medium, separating out cultured algae, carrying out washing, drying and crushing of the cultured algae to obtain protein feed satisfying a feed hygiene standard, adding nutrients into the remaining liquid as a liquid fertilizer production mother liquor obtained by alga separation, adjusting a pH value of the mixed liquid, and carrying out ultrafiltration to obtain a liquid fertilizer product satisfying the GB/T17419-1998 ''foliar microelement fertilizer'' standard. The method provided by the invention realizes comprehensive, efficient and integrated utilization of biogas slurry components. Through marketing or utilization, organic fertilizer particles, foliar fertilizer and protein feed prepared by the method further improve the income and a return rate of biogas engineering.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for recycling biogas slurry in a multi-component whole process. Background technique [0002] At present, with the wide application of anaerobic fermentation biogas technology, biogas slurry is also produced in large quantities. Biogas slurry is the residue after anaerobic fermentation of various organic matter such as livestock and poultry manure, crop straw, and urban organic waste. How to dispose of biogas slurry efficiently and at low cost has become one of the urgent problems to be solved in biogas projects. Under normal circumstances, although biogas slurry can be directly applied to farmland as fertilizer, it needs to consider the season of fertilizer use and the carrying load of farmland. Once it is excessive, it will easily cause soil pollution and eutrophication of surrounding water bodies. If the biogas slurry is regarded as sewa...

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): C02F9/04C05F7/00C12N1/12C12R1/89
CPCY02A40/20
Inventor 刘宾徐霞赵玉柱吉恒
Owner 中国科学院生态环境研究中心鄂尔多斯固体废弃物资源化工程技术研究所
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