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Studies on Optimization Technology of Fermentation with Corn Straw and Cow Dung Mixed Material

Author: ZhaoYuanLiang
Tutor: ZhangQuanGuo
School: Henan Agricultural University
Course: Agricultural Biological Environmental and Energy Engineering
Keywords: pretreatment Mixed anaerobic fermentation Variable temperature Optimization
CLC: S216.4
Type: Master's thesis
Year: 2011
Downloads: 39
Quote: 0
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Abstract


The paper is is a research supported in the national agricultural technology project "to stalk the core cycle energy utilization of agricultural technology integration and demonstration" (item number :2130106-38) and the National Agriculture Science and Technology funds the project "Solar assisted hot-efficient gas equipment in rural areas engineering technology testing and conversion "(05EFN214100171) .This class closely around the straw and animal manure joint use of resources, select a common stalk, simulation Li Jia Xinzheng City established a dairy farm mixed anaerobic digestion model simulating test system to study the pretreatment of corn stover optimize the new technology, discusses the changing temperature, constant temperature mixture of straw and manure anaerobic law.(1) on consulting, research corn straw existing pretreatment of first proposed, based on the physical grinding, then in atmospheric conditions two paragraphs acid hydrolysis and ultrasonic pretreatment technology of baths heating method, and determine the appropriate process condition for: a period concentrated acid pretreatment, solid-liquid ratio for 1:15, acid concentration, 55 percent of ultrasonic time 25 min, ultrasonic temperature 85℃, saccharification rate achieve maximum; Two sections of dilute acids section, straw granularity hydrolysis for 140 mesh, solid-liquid ratio for 1:12 sulphuric acid concentration, rare for 60min 0.5%, ultrasonic time when glycosylated rate reached for the largest. After the two paragraphs hydrolysis, total sugar yield increased significantly, can reach 83.81% than conventional acid type hydrolysis, increases about 26%.(2) according to henan xinzheng good advantage of the actual situation of dairy farms established simulation, discusses reaction fermentation system under the condition of constant temperature variable mild; Variable temperature conditions, cow muck and maize straw for the different mix proportion, the influence of fermented results that the relevant conclusions: mixed fermentation is superior to the effect of simple use of cow dung fermentation, 41.47% under constant temperature effect, variable temperature higher than under the condition of approximately 96% higher; The cow muck and corn straw 3:1 ratio of 1:1 ratio of fermentation is superior to gas production increased fermented, antibiotic added up; Ratio of high temperature change mixed fermentation of sensitive.Research contents of the current solve straw and livestock and poultry class feces mixed anaerobic fermentation, improve gas yield to have the certain reference value to the development of our country agriculture, ecological environment, improve rural has a positive effect.

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CLC: > Agricultural Sciences > Agricultural Engineering > Agricultural power,rural energy > Application of bio-energy ( biomass) > Biogas
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