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

Method for improving gas production performance of anaerobic digestion by pretreating corn straw with low temperature water freezing

A technology for freezing pretreatment and corn stalks is applied in the field of anaerobic digestion of corn stalks and achieves the effects of low cost, mild operating conditions and simple operation.

Active Publication Date: 2018-05-25
BEIJING UNIV OF CHEM TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problem of efficiently pretreating corn stalks under low-pollution and mild operating conditions, it is intended to provide a method that can effectively improve the gas production performance of corn stalks and open up a new way for the full utilization of corn stalks

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 gas production performance of anaerobic digestion by pretreating corn straw with low temperature water freezing
  • Method for improving gas production performance of anaerobic digestion by pretreating corn straw with low temperature water freezing
  • Method for improving gas production performance of anaerobic digestion by pretreating corn straw with low temperature water freezing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 3 parts of corn stalks crushed to below 20 mesh, each part of corn stalks has a quality of 52g (in TS), add 100.68 milliliters of water to make it and the total mass of corn stalks contained in water (3.32 milliliters) be corn stalks 2 times the dry weight (104 ml). Store in airtight condition at 20°C for 1 day, 3 days and 5 days for pretreatment. At the same time, a group of untreated corn stalks without adding water was set as a control.

[0022] The pretreated corn stalks were mixed with 12g TS anaerobic sludge respectively, added to the anaerobic digestion reaction device, and tap water was added to reach 80% of the reaction device. Put the reactor filled with nitrogen gas and sealed after adding the materials into a shaker at 35°C, and shake. The anaerobic fermentation period is 75 days. The daily gas production volume was recorded by the drainage gas collection method, and the volume fraction of methane was measured every day to calculate the total methan...

Embodiment 2

[0036] Weigh 3 parts of corn stalks crushed to below 20 mesh, each part of corn stalks has a weight of 52g (calculated in TS), add tap water 6 times its dry weight, add 308.68 ml of water to make it equal to the water contained in the corn stalks (3.32 ml) had a total mass of 6 times the dry weight of corn stover (312 ml). Sealed storage at -20°C for 1 day, 3 days and 5 days for pretreatment. At the same time, a group of untreated corn stalks without adding water was set as a control.

[0037] The pretreated corn stalks were mixed with 12g (TS) anaerobic sludge respectively, added to the anaerobic digestion reaction device, and tap water was added to 80% of the reaction device. Put the reactor filled with nitrogen gas and sealed after adding the materials into a shaker at 35°C, and shake. The anaerobic fermentation period is 75 days. The daily gas production volume was recorded by the drainage gas collection method, and the volume fraction of methane was measured every day ...

Embodiment 3

[0051] Weigh 3 parts of corn stalks crushed to below 20 mesh, each part of corn stalks has a weight of 52g (calculated in TS), add tap water 10 times its dry weight, and add 516.68 ml of water to make it equal to the water contained in the corn stalks. (3.32 ml) with a total mass of 10 times the dry weight of corn stover (520 ml). Store in airtight condition at 4°C for 1 day, 3 days and 5 days for pretreatment. At the same time, a group of untreated corn stalks without adding water was set as a control.

[0052] The pretreated corn stalks were mixed with 12g (TS) anaerobic sludge respectively, added to the anaerobic digestion reaction device, and tap water was added to 80% of the reaction device. Put the reactor filled with nitrogen gas and sealed after adding the materials into a shaker at 35°C, and shake. The anaerobic fermentation period is 75 days. The daily gas production volume was recorded by the drainage gas collection method, and the volume fraction of methane was ...

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 method for improving the performance of anaerobic digestion and gas production by pretreating corn stalks with low-temperature water freezing belongs to the technical field of high-efficiency resource utilization of corn stalks. Tap water is used as a pretreatment reagent to pretreat corn stalks. The amount of tap water added is 1‑10 times the dry weight of corn stalks. After stirring, seal with parafilm; store in a sealed container at ‑20°C‑20°C for 3 days for pretreatment ; Anaerobic fermentation after pretreatment, the anaerobic fermentation process requires activated sludge, the amount of activated sludge added relative to 52g TS corn stalks is 12g TS; after adding activated sludge, then add tap water to 80% of the total volume of the reaction device, Fill it with nitrogen, then seal it with a rubber stopper, and fix the reactor in a shaker with a constant temperature of 35±2°C and shake. After low-temperature water pretreatment, the total gas production volume increased by 27%-60%, and the total methane production volume increased by 70%-110%. Fertilizer; low cost, simple operation; mild operating conditions.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency resource utilization of corn stalks, and relates to an anaerobic digestion process of corn stalks pretreated by low-temperature water freezing. Background technique [0002] Corn stalks belong to cellulosic biomass, rich in nutrients and easy-to-use chemical components, and are rich in renewable organic substances, but most of them are discarded or burned in the open, causing serious waste of resources, environmental pollution, and obstruction of normal traffic. question. [0003] Corn straw is mainly composed of three major components: cellulose, hemicellulose and lignin. Anaerobic digestion technology is used to process and utilize corn straw to produce efficient, clean and high-quality biomass energy—biogas, which is the resource utilization of corn straw. effective way. However, hemicellulose, as a molecular adhesive, binds between cellulose and lignin, embeds cellulose molecules in ...

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 李秀金刘春梅袁海荣邹德勋刘研萍朱保宁
Owner BEIJING UNIV OF CHEM TECH
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