产酸脱硫反应器中影响硫酸盐还原的关键因素研究  

Effect of key factors on sulfate reduction in an acidogenic sulfate-reducing reactor

作　　者：王爱杰[1] 任南琪[1] 计红芳[2] 李建政[1] 郭婉茜[1] 

机构地区：[1]哈尔滨工业大学环境生物技术研究中心 [2]沈阳农业大学微生物系,辽宁沈阳110601

出　　处：《哈尔滨工业大学学报》2002年第4期445-449,共5页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目 ( 5 99780 12 ) ;黑龙江省自然科学基金资助项目

摘　　要：为定量化分析影响硫酸盐还原过程中的关键因素 ,采用产酸脱硫反应器进行连续流试验和静态试验 ,考察硫酸盐还原过程的致变量—COD SO42 - 比、硫酸盐负荷率 (Ns)和因变量—pH值、氧化还原电位(ORP)和碱度 (ALK)与硫酸盐去除率的对应关系 .试验结果表明 ,欲实现硫酸盐去除率达到 80～ 90 %的水平 ,上述四个关键因子应满足下列条件 :COD SO42 - 比大于 2 .0 ,Ns小于 7.5kg (SO42 - ) (m3·d) ,pH值为 6 .0～ 6 .2 ,ORP为 - 32 0～ - 4 2 0mV ,ALK为 15 0 0～ 2 0 0 0mg L时 .而且 ,此时反应器的运行应控制在中温 ( 34± 1℃ )条件 ,进水中硫酸盐的浓度小于 2 0 0 0mg L ,水力停留时间 (HRT) 6～ 8h ,生物量 (MLVSS)大于 10 0 0 0mg L,进水碱度约 30 0mg L ,出水中的挥发性脂肪酸 (VFA)含量小于 2 0 0 0mg L .In order to investigate the effect of key factors on sulfate reduction in an acidogenic phase reactor of two-phase anaerobic bio-treatment system, continuous-flow experiment and batch test were conducted in an acidogenic sulfate-reducing reactor which has high efficiency for sulfate reduction to investigate the quantification effects of causing-factors including COD/SO 4 2- ratio and sulfate loading rate (Ns), and following-factors including pH value, oxidation reduction potential (ORP) and alkalinity (ALK) on sulfate removal rate. It was demonstrated that 80% to 90% sulfate removal rate could be achieved when COD/SO 4 2- ratio over 2.0,Ns was lower than 7.5 kg (SO 4 2- ) /(m 3 ·d),pH value at 6.0 to 6.2,ORP at -320 mV to -420 mV, and ALK at 1 500 mg/L to 2 000 mg/L. In addition, the operational conditions of acidogenic sulfate-reducing reactor should be controlled as follows: influent sulfate concentration lower than 2000mg/L, hydraulic retention time (HRT) at 6.0 to 8.0 h, temperature at 34±1 ℃, biomass over 10 000 mg/L,influent ALK about 300 mg/L,effluent volatile fatty acid (VFA) lower than 2 000 mg/L.

关 键 词：硫酸盐还原 产酸脱硫反应器 影响因素 硫酸盐还原菌 SRB 去除率 废水处理 

分 类 号：X703[环境科学与工程—环境工程]