Effect of biochar composite carrier on methane production from the mixed anaerobic fermentation of rice straw-pig manure
In this paper,biochar composite carrier was constructed by using biochar loaded with different concentrations of sodium bicarbonate,humic acid,Tween 20 and other catalytic regulators,and each composite carrier was added to the rice stub-pig manure mixed anaerobic fermentation system for anaerobic fermentation.By measuring the gas production,methane production and the degradation rate of straw lignocellulose of each treatment,the role of biochar composite carrier on methane production in mixed anaerobic fermentation and straw degradation was revealed.The results show that the biochar composite carrier can increase the peak value of methane production and shorten the time of peak value of methane production.Biochar composite carriers can significantly increase the cumulative gas production and the cumulative methane production of anaerobic fermentation systems,with the best effect of biochar-loaded Tween 20,followed by biochar-loaded humic acid and biochar-loaded sodium bicarbonate.Compared with the control group,the gas production and the methane production of biochar loaded Tween 20 treatment increased by 23.18%and 62.20%,respectively.In each treatment,the degradation degree of straw was the highest in biochar loaded Tween 20 treatment,followed by biochar-loaded humic acid,biochar-loaded sodium bicarbonate and control group.The optimal loading concentrations of Tween 20,humic acid and sodium bicarbonate were 2.25,0.75,2.10 g/L,respectively.
field mixed anaerobic fermentationcatalytic regulatorbiocharcomposite carriermethane
万方数据
维普
