硫自养反硝化处理高含氟光伏废水可行性  

Feasibility of Sulfur-based Autotrophic Denitrification of Photovoltaic Wastewater Containing High Fluorine

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

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

出　　处：《环境科学》2016年第8期3094-3100,共7页Environmental Science

基　　金：国家自然科学基金项目(51478284;51408387);2015年江苏省大学生创新实践训练计划项目(201510332029Y);江苏省环境科学与工程重点专业(类)项目;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;苏州市分离净化材料与技术重点实验室项目(SZS201512)

摘　　要：为了研究硫自养反硝化处理高含氟光伏废水的可行性,室温(20~25℃)下,采用驯化后的硫自养反硝化生物膜反应器,探究了不同进水F-浓度对硫自养反硝化脱氮效能的影响.结果表明,当进水F-浓度为0~700 mg·L^(-1)时,随着F-浓度的提升,反应器的脱氮效能逐渐提升,且当F-浓度为700 mg·L^(-1)时,可获最大TN去除速率1.0 kg·(m3·d)-1.当进水F-浓度在700~900 mg·L^(-1)时,经短期驯化,TN去除速率可稳定在0.81~0.87 kg·(m^3·d)^(-1).当进水F-浓度提升至900 mg·L^(-1)以上时,反应器的TN去除速率随进水F-浓度的提升而下降,最低至0.4~0.5 kg·(m^3·d)^(-1).以光伏废水为研究对象,在进水F-浓度为800 mg·L^(-1)左右,进水NO_3^--N浓度为390~420 mg·L^(-1),HRT为8.8 h的条件下,经50 d运行后,获得稳定的脱氮效能,TN去除速率为1.1 kg·(m^3·d)^(-1),出水TN为15~25 mg·L^(-1),达到污水接管排放标准.采用传统反硝化工艺和硫自养反硝化工艺脱氮处理光伏废水的成本分别为2.468元·t^(-1)和2.072 8元·t^(-1),硫自养反硝化工艺更节约脱氮处理成本.Effect of different influent F-concentrations on nitrogen removal efficiency of sulfur-based autotrophic denitrification was researched at room temperature（ 20-25℃） using domesticated biofilm reactor to explore the feasibility of sulfur-based autotrophic denitrification of photovoltaic wastewater containing high fluorine. The results indicated that when the influent F-concentration was in the range of 0-700 mg·L-1,the nitrogen removal efficiency promoted with rising influent F-concentration. The maximum TN removal rate of 1. 0 kg·（ m3·d）- 1was attained with the influent F-concentration was 700 mg·L-1. When the influent F-concentration increased to 700- 900 mg·L-1,the removal rate of TN reached a stable level at 0. 81-0. 87 kg·（ m3·d）-1 after short-term domestication. When the influent F-concentration was above 900 mg·L-1,the removal efficiency of reactor lowered with rising influent F-concentration. The minimum TN removal rate was 0. 4-0. 5 kg·（ m3·d）-1. Photovoltaic wastewater was used as the influent of the reactor. After 50 d operation,the reactor gained steady denitrification efficiency. With the influent NO3--N concentration of 390-420 mg·L-1,F-concentration of 800 mg·L-1,and HRT of 8. 8 h,the maximum TN removal rate of 1. 1 kg·（ m3·d）-1 was attained.The effluent TN concentration was 15-25 mg·L-1,which met the standard of sewage discharge. Costs of treating photovoltaic wastewater by disposing conventional denitrification and sulfur-based autotrophic denitrification were 2. 468 Yuan·t-1 and 2. 072 8Yuan·t-1,respectively. Compared with conventional denitrification,the sulfur-based autotrophic denitrification could save more costs.

关 键 词：硫自养反硝化 高含氟光伏废水 单质硫 脱氮效能 氟影响 

分 类 号：X703.1[环境科学与工程—环境工程]