太阳光下Fenton氧化-混凝法深度处理垃圾渗滤液试验研究

针对经生物处理后难以进一步生物降解的垃圾渗滤液,提出采用太阳光下Fenton氧化-混凝法进行深度处理.比较了直接混凝法、太阳光下Fenton氧化法及其联合处理技术对垃圾渗滤液COD_(Cr)的处理效果.结果表明,垃圾渗滤液进行直接混凝处理的效果不理想.COD_(Cr)的去除率仅为17.8%;太阳光可有效地催化Fenton试剂对垃圾渗滤液COD_(Cr)的去除效果,但要其COD_(Cr)低于国家二级排放标准则需消耗H_2O_2的浓度大于600 mmol/L.导致其处理成本较高;而采用太阳光下Fenton氧化-混凝联合处理技术.垃圾渗滤液低于国家二级排放标准只需投加H_2O_2的浓度为170 mmol/L,比单纯采用太阳光下Fenton 氧化法处理垃圾渗滤液可节约H_2O_2用量2.53倍以上.

Advanced solar photo-Fenton oxidation-coagulation combined treating method of landfill leachate

The paper is to introduce an innovated combined processing method known as at an advanced solar photo-Fenton oxidation-co-agulation treating method of landfill leachate, which is too hard for further biological degradation. To compare the single coagulation process, single solar photo-Fenton oxidation process and the combined process for their different treating efficiencies in removing COD_(Cr), we have done a series of experiments and found that the single coagulation process fails to remove COD_(Cr) effectively, because its removal rate was only 17.8%. However, we have discovered that although effective degradation of COD_(Cr) can be achieved by single solar photoFenton oxidation process, the results remain below the second grade state emission standard, which reminds us of the need to consume H_2O_2 denser than 600 mmol/L so as to achieve the necessary goal.Besides, it is also uneconomical. In contrast, if the solar photo-Fen-ton oxidation-coagulation combined process is used for advanced treatment of landfill ieachate, the efficiency can be made much higher. In that case, it proves possible to reduce COD_(Cr) to the second grade of the national emission standard by using 170 mmol/L H_2O_2 in the treatment. In addition, it can be expected to save 2.53 times of H_2O_2.