废水中苯酚、硫化物和硝酸盐的同步去除  

Simultaneous removal of phenol,sulfide and nitrate from wastewater

作　　者：许健 刘春爽[1] 张秀霞[1] 李文斐 

机构地区：[1]中国石油大学(华东)化学工程学院,山东青岛266580

出　　处：《现代化工》2017年第2期66-69,共4页Modern Chemical Industry

基　　金：国家自然科学基金资助项目(21307160);山东省自然科学基金(ZR2013EEQ030);中央高校科研业务费(16CX02040A)

摘　　要：利用UASB反应器考察反硝化脱硫工艺(Denitrifying sulfide removal,DSR)对废水中苯酚、硫化物和硝酸盐的去除效果,并通过高通量测序技术分析工艺运行过程中微生物群落结构特征。结果表明:DSR工艺可以同步去除废水中苯酚、硝酸盐和硫化物,硫化物全部转化为硫酸盐,无单质硫积累;控制适当的S/N质量比有利于保持较好的碳氮硫去除率,S/N质量比为2∶3时,NO-3-N、S2-和C6H5O--C去除率分别达到73%、95%和80%;DSR工艺运行过程中主要存在的异养反硝化菌属为Bacillus、Thauera、Pseudomonas和SB-1_norank,自养反硝化菌属为Thiobacillus、Azoarcus和Sulfurovum。By using UASB reactor,the operational performance of denitrifying sulfide removal process to remove phenol,sulfide,and nitrate from wastewater is investigated. The microbial community structure is analyzed using highthroughput amplicon sequencing method. The results show that phenol,nitrate and sulfide in the wastewater could be simultaneously removed by denitrifying sulfide removal process. The sulfide is converted into sulfate completely and there is no elemental sulfur accumulation. Appropriate S/N ratio is beneficial to maintain a better removal efficiency of carbon,nitrate and sulfide. The removal rates of NO-3-N,S2-and C6H5O--C can reach 73%,95% and 80%,respectively,when the mass ratio of S/N is 2 ∶ 3. The Bacillus,Thauera,Pseudomonas and SB-1 norank are the main heterotrophic denitrifiers. The Thiobacillus,Azoarcus and Sulfurovum are the main autotrophic denitrifiers identified during the whole process.

关 键 词：反硝化脱硫 硫化物 单质硫 微生物群落结构 

分 类 号：X52[环境科学与工程—环境工程]