异养与硫自养反硝化协同处理高硝氮废水特性研究  

Characteristics of a Combined Heterotrophic and Sulfur Autotrophic Denitrification Technology for Removal of High Nitrate in Water

作　　者：李祥[1,2] 马航[1,2] 黄勇[1,2] 朱亮[1,2] 杨朋兵 朱强[1,2] 

机构地区：[1]苏州科技大学环境科学与工程学院,苏州215009 [2]苏州科技学院环境生物技术研究所,苏州215009

出　　处：《环境科学》2016年第7期2646-2651,共6页Environmental Science

基　　金：国家自然科学基金项目(51478284;51408387);江苏省研究生创新基金项目(CXLX14_1289);江苏省特色优势学科二期立项项目;江苏省水处理技术与材料协同创新中心项目;2015年江苏省大学生创新实践训练计划项目(201510332029Y)

摘　　要：在异养反硝化反应器中添加单质硫,实现硫自养与异养反硝化联合处理NO_3^-废水,探讨异养和硫自养反硝化协同过程中的p H恒定及污泥减量化的特性.结果表明,硫自养反硝化菌在异养反硝化反应器内能够实现快速生长.经过65d的运行,控制进水TOC/N为0.65~0.75时,协同反硝化在无额外碱添加的情况下,厌氧反硝化产生的碱度满足自养反硝化的需求;运行至116d时,协同反硝化的总氮去除率为85%以上,脱氮效能稳定在2.5 kg·(m^3·d)^(-1).通过与完全异养反硝化相比,协同反硝化的污泥产量仅为完全异养反硝化的60%,极大地降低了污泥产量.但是利用协同自养反硝化处理高浓度NO_3^--N废水时,存在NO_2^--N累积的现象,即使是最终稳定期也有20 mg·L^(-1),需进行深度处理.A combined heterotrophic and sulfur autotrophic denitrification technology for NO-3-N wastewater treatment was started up by adding elemental sulfur in the heterotrophic denitrifying reactor,and the characteristics of p H constant and sludge reduction were studied. The results showed that the sulfur autotrophic denitrification bacteria in heterotrophic denitrifying reactor could achieve rapid growth. After running for 65 d,TOC / N was controlled between 0. 65 and 0. 75,and the combined denitrification process did not require external alkalinity supplementation as the alkalinity need of autotrophic denitrifiers was supplemented by the heterotrophic denitrifiers.After running for 116 d,the total nitrogen removal rate reached above 85%,and the denitrification efficiency was kept steady at 2. 5kg·（ m^3·d）^（-1）. Compared to heterotrophic denitrification,the sludge production was greatly reduced,which was only 60% of that produced in combined heterotrophic and sulfur autotrophic denitrification reactor. NO_2^--N accumulated by using collaborative denitrification treatment of high concentration of NO_3^--N wastewater,the concentration reached 20 mg·L^（-1） even at the eventual plateau stage,which would require deep processing.

关 键 词：异养反硝化 自养反硝化 协同 pH恒定 污泥减量化 

分 类 号：X703.1[环境科学与工程—环境工程]