太湖蓝藻产沼气潜力及复合折流板反应器ABR工艺中试

江苏农业学报(JiangsuJ.ofAgr.Sci.),2008,24(6):948～953太湖蓝藻产沼气潜力及复合折流板反应器(ABR)工艺中试杜静1,2,严少华1,常志州1,黄红英1,全桂香1,2,叶小梅1,张建英1(1.江苏省农业科学院农业资源与环境研究所,江苏南京210014;2.南京农业大学资源与环境科学学院,江苏南京210095)收稿日期:2008-04-09基金项目:江苏省科技厅太湖治理专项(BS2007147);江苏省农业自主创新项目(BM2008009)作者简介:杜静(1982-),男,四川眉山人,硕士研究生,研究方向为固体废弃物处理与资源化利用。通讯作者:常志州,(Tel)025-84390238;(E-mail)czhizhou@hotmail.com摘要:采用批次发酵方式研究了太湖蓝藻产沼气潜力,并进行了理论值推算。同时采用复合折流板反应器(ABR)工艺,进行了太湖蓝藻厌氧发酵的中试运行,以评估ABR工艺处理蓝藻的可行性。研究结果表明,在35℃、发酵60d条件下,蓝藻实际TS(总固体)产气潜力为378.61ml/g、VS(挥发性固体)产气潜力为410.80ml/g,发酵前15d,产气量占到总产气量的60%以上,化学需氧量(COD)去除率达到46.7%。中试运行结果表明:在有机负荷为10000～30000mg/L、外界气温28℃左右、水力停留时间(HRT)为10d的条件下,COD去除率平均达到65%左右,pH值较稳定;而当外界温度下降后,延长HRT至20d,COD去除率降低至45%左右。此外,中试发酵沼液中的藻毒素(MC-RR、MC-LR)含量,圴低于世界卫生组织(WHO)已制定的基准值(1μg/L),表明厌氧发酵处理可以达到蓝藻无害化处理的目的。关键词:蓝藻;沼气;复合折流板反应器;藻毒素中图分类号:TQ920.4文献标识码:A文章编号:1000-4440(2008)06-0948-06PotentialofMethaneProductionofBlueAlgaeandItsFeasibilityofFermentationwithAnaerobicBaffledReactorDUJing1,2,YANShao-hua1,CHANGZhi-zhou1,HUANGHong-ying1,QUANGui-xiang1,2,YEXiao-mei1,ZHANGJian-ying1(1.InstituteofAgriculturalResourceandEnvironmentalSciences,JiangsuAcademyofAgriculturalSciences,Nanjing210014,China;2.CollegeofResourcesandEnvironmentalSciences,NanjingAgriculturalUniversity,Nanjing210095,China)Abstract:ThetheoreticalandpracticalpotentialofmethaneproductionofbluealgaefromTaihuLakewereinvesti-gatedusingbatchanaerobicfermentationmethod;meanwhile,apilot-scaleexperimentwasconductedtoinvestigatethefea-sibilityofanaerobicfermentationofbluealgaeusingABR(anaerobicbaffledreactor)method.ThepracticalpotentialofmethaneproductionofbluealgaetotalsolidfromtheTaihuLakewas378.61ml/L,andthepracticalpotentialofmethaneproductionofbluealgaevolatilesolidfromtheTaihuLakewas410.80ml/Lat35℃for60dfermentation.Inthefirst15d,thevolumeofmethaneproductionaccountedformorethan60%oftotalmethaneproductionandthereductionrateofCOD(chemicaloxygendemand)reached46.7%.Theresultsofpilot-scaleexperimentindicatedthatthereductionrateofCODwasabout65%onaverageandthevalueofpHwasstableundertheorganiclo