O3-H2O2体系降解垃圾浓缩液中有机物实验研究  

Decomposition of Organics in Concentrated Leachate with O_3-H_2O_2System

作　　者：张爱平[1,2] 陈炜鸣 李民 张永奎[2] 

机构地区：[1]四川范大学化学与材料科学学院,“特种废水处理”四川省高校重点实验室,610068 [2]四川大学化学工程学院,610065 [3]西南交通大学地球科学与环境工程学院,四川成都611756

出　　处：《水处理技术》2016年第8期87-92,共6页Technology of Water Treatment

基　　金：四川省高校重点实验室开放项目(SWWT2014-4);四川省教育厅项目(15ZB0034);四川省科技厅创新苗子工程资助项目(2015039);四川师范大学开放实验项目(KFSY2015-25);四川师范大学大型精密贵重仪器设备开放共享专项(DJ2014-39)

摘　　要：研究了O_3-H_2O_2体系降解膜滤垃圾浓缩液中有机物的效果与特点。结果表明,在反应时间为30 min,臭氧投加质量流量为4 g/h时,添加4 m L/L的H2O2可取得理想的处理效果,BOD_5/COD由0.025提升至0.527,对色度、腐殖酸、COD的去除率分别为86.99%、62.94%、53.03%,较之O_3体系的去除率分别提高了23.05%、18.91%、19.55%,原因是适量的H_2O_2有强化反应体系中自由基的作用。O_3-H_2O_2体系能将腐殖酸等大分子有机物分解为小分子烷烃类等臭氧惰性产物,随反应时间的延长以及H2O2的影响,p H有下降的趋势,且有机物的降解逐渐矿化为CO_3^(2-),由此导致了反应后期臭氧的利用率下降以及有机物的去除速率有所降低。In this study, a concentrated leachate from reverse osmosis was treated by O3 combined with H2O2. The efficiency and characteristic of organics removal were investigated. The results showed that the system with 4 mL/L H2O2 displayed the highest efficiency. At the condition of mass flow rate of 4 g/h O3 and reaction time of 30 min, the removal efficiencies of color, humic substances and COD were 86.99%, 56.53% and 53.03%, respectively. The free radical was enhanced by proper H2O2 dosage. In contrast to O3 alone, the removal effieiencies were improved by 23.05%, 22.18% and 19.55%. The humic substances were decomposed to micro-organics such as alkanes, which were almost inert to be ozonized. With the prolonging of reaction and the influence from H2O2, a significant decrease in pH was observed. Gradual mineralization of organics was also found, which led to a decline in O3 utilization and organics removal.

关 键 词：O3-H2O2 降解 垃圾浓缩液 有机物 可生化性 

分 类 号：X703.1[环境科学与工程—环境工程]