耐盐反硝化污泥与复合菌剂对高硫酸盐含氮废水的处理性能  

Treatment performance of high-sulfate nitrogenous wastewater by salttolerant denitrifying activated sludge and compound bacteria agents

作　　者：吴贵阳 张泽梁 田志娟 李步 俞柯吟 叶斌杰 汪金立 阮文彬 冯丽娟 WU Guiyang;ZHANG Zeliang;TIAN Zhijuan;LI Bu;YU Keyin;YE Binjie;WANG Jinli;RUAN Wenbin;FENG Lijuan(College of Marine Science and Technology,Zhejiang Ocean University,Zhoushan 316022,China;SINOPEC Luoyang Petrochemical Company,Luoyang 471110,China;Zhejiang Provincial Key Laboratory of Petrochemical Pollution Control,Zhejiang Ocean University,Zhoushan 316022,China)

机构地区：[1]浙江海洋大学海洋科学与技术学院,舟山316022 [2]中国石油化工股份有限公司洛阳分公司,洛阳471100 [3]浙江海洋大学,浙江省石油化工环境污染控制重点实验室,舟山316022

出　　处：《环境工程学报》2023年第2期644-654,共11页Chinese Journal of Environmental Engineering

基　　金：中石化洛阳分公司委托课题《耐盐复合菌剂制备及其在高盐高氮废水处理应用研究》(H21028007022)。

摘　　要：以耐盐反硝化污泥(DAS)和反硝化复合菌剂(DBA)为菌源,启动序批式生物膜系统(SBBRs)处理高硫酸盐含氮废水。结果表明,以相对低盐度(1%:12.5 g·L^(-1)SO_(4)^(2-)和5 g·L^(-1)NaCl)启动系统,在不同菌源和载体条件下SBBRs启动时间均较短(6~11 d),其中以DAS为菌源、载体污泥浸制预处理均能缩短启动周期。提升SO_(4)^(2-)质量浓度至25 g·L^(-1)(盐度2%)和37.5 g·L^(-1)(盐度3%)后,各装置的硝氮去除率均可维持90%以上,其中3%盐度下悬浮填料系统反硝化完全(>98%),显著高于生物绳系统(91.1±11.7)%。理论TOC/TN比为1.4~7,系统总氮去除率均稳定保持90%以上。优选TOC/TN值为2的实验室内处理石化厂高硫酸盐(2.7%)高氮(TN≈200 mg·L^(-1))废水,系统适应驯化后可获得稳定高效的总氮去除率,且悬浮填料去除率(>99%)与稳定性均优于生物绳(>90%)。系统硝酸盐还原途径以反硝化为主,且无显著硝酸盐异化还原为氨和硫酸盐还原作用。In this study, salt-tolerant denitrifying activated sludge(DAS) and denitrifying bacterial agents(DBA) were used as inoculants to start sequential batch biofilm systems(SBBRs) treating high-sulfate nitrogenous wastewater. The results showed that the start-up period of SBBRs was short(6-11 d) with different sources of inoculants and carriers at salinity of 1%(12.5 g·L^(-1)SO_(4)^(2-)and 5 g·L^(-1)NaCl), of which the start-up period of SBBRs was reduced with DAS as inoculants or carriers pretreatment via sludge leaching. After upgrading SO_(4)^(2-)mass concentrations to 25 g·L^(-1)(salinity of 2%) and 37.5 g·L^(-1)(salinity of 3%), SBBRs were still able to maintain the nitrate reduction rates higher than 90%. The complete denitrification(>98%) occurred in SBBRs with suspended carrier at salinity of 3%, which was significantly higher than that(91.1±11.7)% of SBBR with biological rope carrier. The TN removal efficiency of SBBRs consistently maintained at >90% at the theoretical TOC/TN ratios of 1.4-7. SBBRs were further used to treat high sulfate(2.7%) and nitrogen rich(TN≈200 mg·L^(-1)) wastewater at a TOC/TN ratio of 2, and stable and highly efficient TN removal occurred after the system adapted to acclimation, and higher reduction rates(>99%) and stability in the suspended carrier were also achieved than those in carrier biological rope(>90%). The nitrate reduction pathway in the system was dominated by denitrification without significant dissimilatory nitrate reduction to ammonium and sulfate reduction.

关 键 词：耐盐复合菌 生物强化 硫酸盐 菌源 载体 C/N比 

分 类 号：X703.1[环境科学与工程—环境工程]