Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for predicting ammonia nitrogen concentration in anaerobic fermentor under backflow process

A technology of anaerobic fermentation and ammonia nitrogen concentration, applied in the field of biogas engineering, can solve problems such as environmental pollution, and achieve the effect of reducing hidden risks, significant social and economic benefits

Active Publication Date: 2015-08-26
CHINA AGRI UNIV
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the remaining biogas slurry is often discharged into the environment, it will cause serious environmental pollution problems, such as eutrophication of water bodies, continuous and disorderly emission of greenhouse gases, etc.

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 predicting ammonia nitrogen concentration in anaerobic fermentor under backflow process
  • Method for predicting ammonia nitrogen concentration in anaerobic fermentor under backflow process
  • Method for predicting ammonia nitrogen concentration in anaerobic fermentor under backflow process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The method of the present invention will be described in detail below in conjunction with examples.

[0029] Experimental conditions: total solid content of dried chicken manure as fermentation raw material: 90%; volatile solid content: 71.4%;

[0030] Raw material nitrogen content: 4.9% / g total solid content;

[0031] Anaerobic fermentation organic load: 3g VS / L / d;

[0032] Effective volume of CSTR: 20L;

[0033] Hydraulic retention time 25d;

[0034] The daily volume of in and out materials is 0.8L;

[0035] Ammonia nitrogen content in biogas slurry under stable operating conditions before reflux: 2.4g / L

[0036] Suppose: the reflux process does not affect the conversion rate of ammonia nitrogen, then a 0 =a 1 =a 2 =…=a n

[0037] The nitrogen content of dry chicken manure added to the fermenter every day = 3*20*90%*4.9% / 71.43% = 3.7g;

[0038] a 0 =2.4*0.8 / 3.7=0.52; y 0 = 2.4; R = 0.625

[0039] H=[20-(1-0.625)*0.8] / 20=0.985 T=3.7 / 20=0.185

[0040] The ...

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 predicting ammonia nitrogen concentration in an anaerobic fermentor under a backflow process. The method can easily predict dynamic change of the ammonia nitrogen concentration in the fermentor with the increase of backflow time through a formula yn=H<n>*y0+T*a0*[( H<n>-1) / (H-1)] according to active volume of the fermentor, feeding and discharging volume per time, biogas slurry backflow ratio, feeding material organic matter nitrogen content and ammonia nitrogen concentration in the fermentor at the period of backflow beginning stable fermentation. The method has the advantages of being simple and reliable, can better predict the dynamic change trend of the ammonia nitrogen concentration under the backflow process, and provides a mathematical analysis tool for preventing ammonia inhibition in the fermentor.

Description

technical field [0001] The invention relates to the technical field of biogas engineering, in particular to a method for predicting the concentration of ammonia nitrogen in a fermentation tank under an anaerobic fermentation biogas slurry reflux process. Background technique [0002] Anaerobic fermentation biogas technology has attracted widespread attention and rapid development around the world in recent years due to its dual functions of alleviating environmental pollution from livestock and poultry manure and alleviating the pressure of increasing rural energy demand. However, large-scale biogas projects bring a large amount of bioenergy to the entire village and farm, increasing economic and environmental benefits while also producing a large amount of biogas slurry. Biogas slurry is rich in nutrients and is usually returned to the field for utilization. However, in some areas, due to the lack of reasonable planning and matching of the planting and breeding industry str...

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): G06Q10/04G06F17/50C02F11/04
Inventor 董仁杰吴树彪黎佳茜
Owner CHINA AGRI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com