水花生、水葫芦厌氧消化产沼气的中试实验研究

Pilot-scale study on production of biogas from water hyacinth and alternanthera philoxeroides by anaerobic digestion

采用自行设计的推流式厌氧反应器(体积约为4.0 m3)对水葫芦、水花生进行了厌氧发酵产沼气的实验研究,实验结果表明:在实验运行的83 d内,总投加生物质量为5 210 kg(2 591 kg水花生、2 619 kg水葫芦),总产气量为167.901m3(水花生:100.62 m3、水葫芦:67.281 m3),平均每天产气量为2.02 m3。水花生、水葫芦的原料平均产气率分别为0.334m3/kg干物质(TS)和0.447 m3/kg挥发性物质(VS),0.302 m3/kg TS和0.362 m3/kg VS。在水花生投加期间,最高产气速率达6.49 m3/d。在水葫芦投加期间,最高产气速率达3.26 m3/d。

Production of biogas from water hyacinth（WH）and alternanthera philoxeroides（AP） by anaerobic digestion was studied in own-designed and manufactured pilot-scale plug flow reactors（volume：4 m3）.Within the 83 days of operation,the production of biogas was 167.901 m3（AP：100.62 m3,WH：67.281 m3） with treating 5 210 kg biomass（AP：2 591 kg,WH：2 619 kg）,and the average biogas production was 2.02 m3/d.The biogas yield of AP and WH was 0.334 m3/kg TS,0.447 m3/kg VS,0.302 m3/kg TS,0.362 m3/kg VS,respectively.The maximum biogas production rate was 6.49 m3/d in anaerobic digestion of AP,while the value was 3.26 m3/d in anaerobic digestion of WH.