苯酚冲击负荷对前置反硝化系统脱氮的影响  

Effect of phenol load on nitrogen removal in pre-denitrification process

作　　者：路聪聪[1,2] 王淑莹[1] 葛士建[1] 张琼[1] 杨锦辉[1] 彭永臻[1] 

机构地区：[1]北京工业大学北京市水质科学与水环境恢复重点实验室北京市污水脱氮除磷处理与过程控制工程技术研究中心,北京100124 [2]中冶建筑研究总院有限公司,北京100088

出　　处：《中南大学学报（自然科学版）》2014年第6期2130-2136,共7页Journal of Central South University:Science and Technology

基　　金：高等学校博士学科点专项科研基金(优先发展领域)资助项目(20111103130002);2012年学科与研究生教育-创新人才培养计划-博士生创新基金资助项目(YB201210)

摘　　要：采用短期静态试验和长期前置反硝化SBR工艺处理含苯酚生活污水。研究结果表明：随着苯酚质量浓度（0-175mg／L）增大，2个试验中污泥氨氧化速率均逐渐减小，短期试验中最大比基质利用速率由2．898d叫变成O．694d^-1；在前置反硝化系统中，平均氨氧化速率为4．091mg／（g·h），是静态试验（1．812mg／（g·h））的2．26倍，且氨氧化速率与苯酚质量浓度的比值为一恒定值（-0．031±0．005）；在0—5h内苯酚与氨氮同时被去除，去除率分别为24．2％和23．5％；受苯酚冲击系统硝化作用破坏后通过自身结构调整15-18d可恢复至正常水平；较高质量浓度（60-90mg／L）的苯酚毒性抑制作用使微生物形态结构受到不可逆破坏，微生物胞外聚合物中DNA质量分数由2．53mg儋增加至34．6mg／g。The pre-denitrification SBR process of treating municipal waste water including phenol was investigated with the combination of short-term and long-term tests. The results show that the ammonia oxidation rate decreases gradually with the increase of concentration of phenol （0-175 mg/L）, with the specific substrate ulitization rates ranging of 2.898-0.694 d-1.The average ammonia oxidation rate is 4.091 mg/（g·h） in pre-denitrification system and 2.26 times short-term test result （1.812 mg/（g·h））. The ratio of ammonia oxidation rate to phenol concemtration keeps at -0.031 ±0.005. The phenol and ammonia can be removed at 0-5 h with the respective removal efficiencies of 24.2% and 23.5%. Moreover, the ammonia oxidation damage can be recovered to normal levels after 15-18 d through microbial own structure function change. However, the toxicity inhibition at the high phenol concentrations exhibites an irreversible damage, and DNA concentration in extracellular polymer substance varies from 2.53 mg/g up to 34.6 mg/g.

关 键 词：苯酚 氨氧化速率 抑制恢复 

分 类 号：X703[环境科学与工程—环境工程]