摘要
在中试系统中,采用混凝-催化臭氧氧化-曝气生物滤池组合工艺,对垃圾渗滤液MBR生物处理出水进行深度处理。结果表明,组合工艺对渗滤液中的难降解有机物具有良好的去除效果,COD去除率高达87.6%,出水COD<100 mg/L,达到生活垃圾填埋场污染控制标准(GB 16889-2008)的排放要求。组合工艺中,臭氧塔中含锰催化剂填料的投加有效提高了臭氧氧化的效果,对出水达标起到重要作用。实验确定了各处理单元的最佳运行条件:混凝初始p H为6.0,聚铁投加量为1 400 mg/L;臭氧氧化中臭氧投加量为150 mg/L;曝气生物滤池水力停留时间为4.5 h。此外,经计算组合工艺处理成本为7.96元/m3,具有良好的经济性,利于推广应用。
In this study, a combined process of PFS coagulation-catalytic ozonation-biological aerated filter （BAF） was developed for the advanced treatment of MBR effluent of landfill leachate. In the pilot-scale experiment, the combined process showed a good removal performance on the hard-degraded organics with a COD removal efficiency of 87.6%. The final effluent COD was below 100 mg/L, which successfully met the discharge limit of landfill pollution control standard in China （GB 16889-2008）. In the combined process, the addition of ceramic containing manganese oxide in ozonizing tower significantly improved ozonation efficiency, which is essential to the good COD removal performance of system. Besides, the optimal operational conditions of the process were determined as： PFS dosage of 1 400 mg/L and initial pH of 6.0 in coagulation, ozone dosage of 150 mg/L in ozonation, and a HRT of 4.5 h for BAF, respectively. Finally, economic analysis suggested that the operational cost of the combined process was 7.96 yuan/m3, which is more economical than the current commonly used technology.
出处
《水处理技术》
CAS
CSCD
北大核心
2017年第7期94-97,102,共5页
Technology of Water Treatment
基金
广东省科技攻关计划(2015B020235013)
臭氧催化氧化-曝气生物滤池组合工艺应用于印染废水提标改造技术攻关及中试示范工程建设(201610010069)
关键词
垃圾渗滤液
深度处理
催化臭氧氧化
混凝
曝气生物滤池
landfill leachate
advanced treatment
catalytic ozonation
coagulation
biological aerated filter
