Fenton试剂预处理提高钻井废水可生化性  

Improvement of Biodegradability of Drilling Wastewater Pretreated by Fenton's Reagent

作　　者：彭娟华[1] 莫正平 李旭东[1] 

机构地区：[1]中国科学院成都生物研究所,成都610041 [2]中国石油西南分公司川中油气矿,四川遂宁629000

出　　处：《应用与环境生物学报》2008年第2期265-269,共5页Chinese Journal of Applied and Environmental Biology

摘　　要：采用Fenton试剂预处理钻井废水，研究了Fenton反应中各影响因子对废水COD去除率、BOD5／COD值的影响并分析其作用机制，确定了最佳条件，即初始pH为4．0，H2O2／Fe^2＋（摩尔浓度比，c：c）=20，H2O2／COD（质量浓度比，埘：w：w）=1，反应时间为2h。在该条件下，废水的COD去除率约为40％，BOD5／COD值从0．002～0．003提高至0．15～0．2，可生化性得到很大提高，为后续生物处理创造了条件，紫外一可见吸收光谱分析表明，可生化性的改善主要是由于有机物的分子结构发生了变化。The drilling wastewater was pretreated by Fenton＇ s reagent. The various effects of the reagent on the removal efficiency of COD and BOD5/COD ratio were investigated and its mechanism was analyzed. The optimal conditions were： initial pH, 4. 0; molar concentration ratio of H2O2/Fe^2＋ （w： w） , 20; concentration ratio of H2O2/COD （c： c） , 1 and reaction time, 120 min. Under the above conditions, the removal efficiency of COD was about 40% and the BODS/COD ratio increased from 0. 002 - 0. 003 to 0. 15 - 0. 2. The biodegradability of drilling wastewater was greatly improved, which benefits future biological treatment. The results of ultraviolet-visible absorption spectrum analysis showed that the improved biodegradability was caused by the change in molecular structure of organic substances. Fig 6, Tab 3, Ref 14

关 键 词：钻井废水 FENTON试剂 可生化性 紫外一可见吸收光谱 

分 类 号：X703[环境科学与工程—环境工程]