Method for improving urban organic garbage mixed anaerobic digestion directional hydrolytic acidification effect

An anaerobic digestion, hydrolysis and acidification technology, applied in the direction of fermentation, etc., can solve the problems of low anaerobic digestion efficiency and easy corruption, and achieve the effect of reducing investment, improving conversion degree, and strong operability

Active Publication Date: 2014-12-03
BEIJING UNIV OF CHEM TECH
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fact that biomass waste such as kitchen fruits and vegetables is easily corrupted and acidified, the efficiency of anaerobic digestion is not high, so the two-phase anaerobic digestion technology is adopted

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 improving urban organic garbage mixed anaerobic digestion directional hydrolytic acidification effect
  • Method for improving urban organic garbage mixed anaerobic digestion directional hydrolytic acidification effect
  • Method for improving urban organic garbage mixed anaerobic digestion directional hydrolytic acidification effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Mix the crushed kitchen and fruits and vegetables evenly according to the VS ratio of 3:1. The TS of food waste is 22.40%, VS is 20.07%, the TS of fruit and vegetable waste is 13.32%, and VS is 9.95%. The load is set to 30g TS / L means that the feeding load is 25.8gVS / L, and then remove the supernatant from the anaerobic digestion sludge that has settled for 7 days, the pH value is 8.23, the ammonia nitrogen value is 496mg / L, and the solid content of the supernatant is removed after sedimentation The TS is 7.86%, and the concentrated anaerobic digested sludge obtained by centrifuging at 4000r / min for 5 minutes has a solid content of TS of 12.46%, VS of 6.14%, and the inoculation amount of F / M=4:1 by VS Inoculation was performed with an initial pH of 6.20.

[0038] The above experiment was done in 10 parallels, and the effective working volume of the anaerobic digestion reactor was fixed to 500mL with tap water, the feed inlet was closed, a gas metering device was connec...

Embodiment 2

[0045] Mix the crushed kitchen and fruits and vegetables evenly according to the VS ratio of 3:1. The TS of food waste is 20.38%, VS is 18.26%, the TS of fruit and vegetable waste is 11.67%, and VS is 8.72%. The load is set to 60g TS / L means that the feeding load is 51.6gVS / L, and then remove the supernatant from the anaerobic digestion sludge that has settled for 7 days, the pH value is 7.12, and the ammonia nitrogen value is 216mg / L, and the solid content of the supernatant is removed after sedimentation The TS is 5.64%, and the concentrated anaerobic digestion inoculum can be obtained by centrifuging at 4000r / min for 5 minutes. The solid content of TS reaches 11.21%, VS reaches 5.47%, and the inoculum is calculated by VS with F / M=4:1 The amount of inoculation was carried out, and the initial pH value was 4.62.

[0046] The above experiment was done in 10 parallels, and the effective working volume of the anaerobic digestion reactor was fixed to 500mL with tap water, the fe...

Embodiment 3

[0053] Mix the crushed kitchen and fruits and vegetables evenly according to the VS ratio of 3:1. The TS of kitchen waste is 16.80%, VS is 15.05%, the TS of fruit and vegetable waste is 9.62%, and VS is 7.22%. The load is set to 50g TS / L means that the feeding load is 43.0gVS / L, and then remove the supernatant from the anaerobic digestion sludge that has settled for 7 days, the pH value is 7.56, the ammonia nitrogen value is 313mg / L, and the solid content of the supernatant is removed after sedimentation TS is 6.53%, and it can be centrifuged at 4000r / min for 5 minutes to obtain concentrated anaerobic digestion inoculum. The solid content of TS reaches 11.28%, VS reaches 5.65%, and the inoculum is calculated by VS with F / M=4:1 The amount of inoculation was carried out, and the initial pH value was 5.56.

[0054] The above experiments were performed in 10 parallels, and the effective working volume of the anaerobic digestion reactor was fixed to 500mL with tap water, the feed ...

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 improving an urban organic garbage mixed anaerobic digestion directional hydrolytic acidification effect. The method is characterized in that different urban raw organic biomass materials are mixed according to a certain proportion, inoculated by anaerobic sludge according to a certain proportion, and subjected to anaerobic digestion hydrolytic acidification treatment at a feed organic loading rate of 30-60TS / L, namely 25.8-51.6gVS / L, and at 35-55 DEG C; a pH value is controlled at 4.60-6.20; the content of organic acid in a product is obviously higher than that of a control group; and components of acid are controlled directionally, and mainly are alcohol and acetic acid. The method is simple in technology and high in operability; various biomass wastes are simultaneously treated by an anaerobic acidification technique; appropriate proportioning of the different raw materials contributes to element balance in a system, so that the yield of total organic acid is 72-216% higher than that of organic acid not subjected to directional acidification; alcohol and acetic acid account for 98% of total acid; and quality raw materials can be provided for organic acid production, and subsequent methanation treatment of organic acid directional control or two-phase anaerobic digestion.

Description

technical field [0001] The invention belongs to the field of biomass solid waste treatment, in particular to a method for improving the effect of directional anaerobic hydrolysis and acidification of mixed raw materials. Background technique [0002] Municipal organic waste refers to solid waste with high moisture content derived from biomass produced in the process of human production and life. Specifically, food waste refers to the leftover waste generated in catering services outside the daily life of residents, unit feeding and other activities, commonly known as swill; fruit and vegetable waste refers to the residues of peels and vegetables removed during food processing, as well as fruit and vegetable packaging, transportation and Biomass waste generated during sales. The per capita daily waste generation in Beijing is 0.82 kg, the city's daily waste production is 11,500 tons, and the kitchen, fruit and vegetable waste is about 1,050 tons and 1,000 tons. In my countr...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C12P5/02
Inventor 李秀金江志坚朱保宁袁海荣邹德勋
Owner BEIJING UNIV OF CHEM TECH
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