Study On Effect Of Urea And Cellulose On Gasification Characteristics Of Mix Of Chicken Feces And Corn Stalks

In order to solve the problems of the methane fermentation of raw materials can not be fully utilized, the low rate of the actual methane conversion and the low methane gas production. This Experiment under the condition of 8% mass fraction of total solid were conducted in a self-manufactured anaerobic fermentation reactor, with chicken dung and corn straw (at ratio of 2:1) as raw materials,at temperature of 30℃, In the early stage of anaerobic fermentation (add at loading time), medium stage (add at 15 days of normal fermentation) and late stage (add at 30 days of the normal fermentation),the adding materials were urea and cellulose, the adding level located were 5,10,15,20 g/kg four levels, the period of anaerobic fermentation were 46 d. The research studies of the biogas production efficiency of adding urea and cellulose in different periods and at different level in anaerobic fermentationThe main conclusions:(1) When the chicken manure fermentation was a mixed withof and corn stalks, adding urea during the fermentation process can promote the decomposition of raw materials, increased gas production. Adding of urea can increase Urea nitrogen, which can provide nutrients for the anaerobic fermentation of raw materials and adjust C/N, so enhance the biogas production.(2) Adding of urea at three different periods of anaerobic fermentation without a significant impact on biogas production. The adding in each period can all promote anaerobic fermentation, and the biogas production. Adding 5g/Kg of urea respectively in the early, mid, and late period of anaerobic fermentation, the biogas production were increased by-52.2%, 6.9% and 2.1%compare with the CK; Adding 10g/Kg of urea respectively in the early, mid, and late period of anaerobic fermentation, the biogas production were increased by 15.1%, 15.2% and 3.2%compare with the CK; Adding 15g/Kg of urea respectively in the early, mid, and late period of anaerobic fermentation, the biogas production were increased by 1.1%,-6.4% and-52.6%compare with the CK; Adding 20g/Kg of urea respectively in the early, mid, and late period of anaerobic fermentation, the biogas productionwere increased increased by 23.3%,18.3% and 12.4%compare with the CK; After 15d of adding of urea in anaerobic fermentation, the main conclusions were draw as following:Adding of urea in the early, period of anaerobic fermentation can speed up the start time of anaerobic fermentation; Adding of urea in the mid period of anaerobic fermentation can extend the peak biogas production; Adding of urea in the end period of anaerobic fermentation, biogas production was no obvious improvement.(3)Adding urea and three different levels in anaerobic fermentation were a significant impact on biogas production; Adding 5,10,15, and 20 g/kg of urea respectively in the early period in anaerobic fermentation, the biogas production were increased by-52.2%,15.1%, 1.1% and 23.3% compared with the CK;Adding 5,10,15, and 20 g/kg of urea respectively in the mid period in anaerobic fermentation, the biogas production were increased by,15.2%,-6.4% and 18.3% compared with the CK. Adding 5,10,15, and 20 g/kg of urea respectively. in the end period in anaerobic fermentation, the biogas production were increased by 2.1%, 3.2%,-52.6% compared with the CK.(4) Adding of cellulase in three different periods of anaerobic fermentation without a significant impact on biogas production. Adding 5g/Kg of cellulase respectively in the early, mid, and late period of anaerobic fermentation, the biogas production were increased by-31.4%,-3.1% and 0.9%compare with theCK; Adding lOg/Kg of cellulase respectively in the early, mid, and late period of anaerobic fermentation, the biogas production were increased by by -0.8%,0.6% and 16.8%compare with the CK; Adding 15g/Kg of cellulase respectively in the early, mid, and late period of anaerobic fermentation, the biogas production were increased by 9.2%,4.7% and 0.5% compare with the CK; Adding 20g/Kg of cellulase respectively in the early, mid, and late period of anaerobic fermentation, the biogas production. were increased by 8.4%,6.2% and -8.8%compare with the CK; After 15d of adding of cellulase in anaerobic fermentation, the main conclusions were draw as following:adding of cellulase in the early, period of anaerobic fermentation can speed up the start time of anaerobic fermentation; adding of cellulase in the mid period of anaerobic fermentation can extend the peak biogas production; adding of cellulase in the end period of anaerobic fermentation, the biogas production was no obvious improvement.(5) Adding of cellulase at three different levels in anaerobic fermentation without significant impact on biogas production. Adding 5,10,15, and 20 g/kg of cellulase respectively in the early period in anaerobic fermentation, the biogas production were increased by-31.4%,0.8%,9.2% and 8.4% compared with the CK; Adding 5,10,15, and 20 g /kg of cellulase respectively in the mid period in anaerobic fermentation, the biogas production were increased by-3.1%,0.6%,4.7% and 6.2% compared with the CK; Adding 5, 10,15, and 20 g/kg of cellulase respectively in the end period in anaerobic fermentation, the biogas production were increased by 0.9%,16.8%,0.5% and -8.8% compared with the CK.