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《Chinese Journal of Environmental Engineering》 2011-03
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Effect of pretreatment of dilute hydrochloric acid on anaerobic digestion of rice straw

Xu Longjun1 An Lina1 Nong Liwei1 Chen Wei1 Li Li1,2(1.Key Laboratory for the Exploitation of Southwestern Resources and the Environmental Disaster Control Engineering, Ministry of Education,Chongqing University,Chongqing 400044,China;2.Environmental Monitoring Center of Chongqing,Chongqing 401147,China)  
In order to investigate the effect of pretreatment of dilute acid on anaerobic digestion of rice straw the rice straw was anticipated with the different concentration hydrochloric acid solutions.The variations of biogas production,methane content,COD,pH and volatile fatty acid(VFA) were studied under the complete mixture anaerobic condition.The results showed that the concentration increase of the diluted hydrochloric acid solution can improve the effectiveness of anaerobic digestion for straw.After pretreatment with 4%,8% and 12% of hydrochloric acid solution,the total gas production increased by 80.8%,110.8% and 241.3%,respectively.Methane contents in gas increased by 8.2%,9.2% and 11.7%,respectively.Removal rate of volatile solid(VS) increased by 6.9%,12% and 13.7%,respectively and that of COD in digestion solution increased by 23.9%,39% and 44%,respectively.
【Fund】: 重庆市院士基金资助项目(2004-8260)
【CateGory Index】: X712
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