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《Journal of Agro-Environment Science》 2009-01
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Anaerobic Co-digestion of Rice Straw and Swine Feces

CHEN Guang-yin, ZHENG Zheng, ZOU Xing-xing, LI Ji-hong, YANG Shi-guan (State Key Lab of Pollution Control and Resource Reuse, the School of Environment, Nanjing University, Nanjing 210093, China)  
Under mesophilic condition (35 ℃), a bench-scale experiment based on anaerobic co-digestion process of rice straw and swine feces was conducted in a fed-batch single phase reactor. Changes of daily biogas production, cumulative biogas production, methane content, pH, VFAs, NO3-N and NH3-N during digestion process were studied. The results indicated that the anaerobic digestion of rice straw could successfully progress when swine feces was added, 330.14 L of biogas production per kg VS added was obtained and the average methane content was up to 62.88%. The cumulative biogas production, removal of VFAs and TOC were not significant, but it is buffering to acid accu- mulation during anaerobic digestion process. The results of the accumulation efficiency of NO3-N showed that swine feces improved the accu- mulation of NO3-N, increasing by 34.53% compared to rice straw alone, it was efficient to increase the fertilizer value of anaerobically digested effluent.
【Fund】: 江苏省科技项目(BS2007148)
【CateGory Index】: X713
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