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《Journal of Agro-environmental Science》 2004-03
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Anaerobic Co- digestion of Putrescible Organic Waste and Sewage Sludge

QIAO Wei, ZENG Guang ming, YUAN Xing zhong, HUANG Guo he, LIU Cun fang(Department of Environment Science and Engineering, Hunan University, Changsha 410082, China)  
Putrescible organic wastes were short of biomass and water while the sewage sludge was just on the contrary. The mixtures were treated by anaerobic digestion. The TS (total solid concentration) were confirmed at 20% , 30% , 35% and 40% respectively and the added sewage sludge enhanced the microbe biomass. The results showed that acidification inhibition were avoided at 20% , 30% TS 35℃ and 35% TS 55℃ . The pH value could return to neutral after dropped to 3.8 in these three tests. In the courses of pH decreasing, VFA (volatile fatty acid) concentration was low with small variation, while the concentration of VFA increased quickly with pH increasing. VFA under 35℃ was higher than that under 55℃ . When the TS increased up to 40% , the digestion process was broke off and pH maintained low values. After increasing for a short time, CODCr maintained at a high level in liquid phase, with the concentration between 10 000.0 mL· L- 1 and 20 000.0 mL· L- 1. H2S in mesophilic digestion was higher than that in thermophilic process. The maximum concentration of H2S and NH3 were 500 mL· L- 1 and 200 mL· L- 1 respectively. The cellulous degradation rates were influenced greatly by cellulous content of raw mixture, and it is small when the cellulose content in raw material was low.
【Fund】: 国家863高技术资助项目(No2001AA64402);; 国家自然科学基金(70171055、50179011);; 国家杰出青年科学基金(50225926);; 高等学校博士学科点专项科研基金(20020532017);; 2000年教育部高等学校优秀青年教师教学科研奖励计划资助项目
【CateGory Index】: X703
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