脱木素-缺氧-好氧生物膜工艺处理造纸废水试验研究

脱木素-缺氧-好氧生物膜工艺处理造纸废水试验研究脱木素-缺氧-好氧生物膜工艺处理造纸废水试验研究朱光灿1吕锡武2宋海亮2王超2(1河海大学环境科学与工程学院,南京210098;2东南大学环境工程系,南京210096)摘要研究了采用脱木素-缺氧-好氧生物膜工艺处理造纸废水。其中的脱木素工艺可有效地将黑液中碱木素脱稳析出,并提高废水的可生化性。当废水pH=5,绝干纤维污泥与废水COD质量之比为111,硫酸铝投加量为160mg/L时,COD去除率大于63%。缺氧水解单元可有效地去除废水中有机污染物质,并将难生化降解的高分子有机物转化为低分子有机物。当缺氧水解单元进水COD为2200mg/L,容积负荷为1176kgCOD/(m·d),好氧接触氧化单元容积负荷为1111kgBOD/(m3·d)时,出水COD<400mg/L,BOD<30mg/L。关键词脱木素工艺缺氧-好氧生物膜工艺造纸废水黑液Ligninremoval2anoxia2aerobicmembranetreatmentofpapermakingwastewaterZhuGuang2can1,LuXi2wu2,SongHai2liang2,WangChao1(1.CollegeofEnvironmentalScienceandEngineering,HohaiUniversity,Nanjing210098,China;2.DepartmentofEnvironmentalEngineering,SoutheastUniversity,Nanjing210096,China)Abstract:TheLigninremoval2anoxia2aerobicmembranetreatingpapermakingwastewaterisresearchedandobservedthattheLigninremovalprocesscanseparateoutthebasicligninfromtheblackliquor,sothebiologicaltreatabilityofthewastewaterisimproved.IncasewhentherawwastewaterhaspH=5,ratioofabsolutedrylignintowastewater=1∶1andaluminumsulfatedosage=