Pliego G, Zazo J A, Pariente M I, Rodríguez I, Petre A L, Leton P, García J
Chemical Engineering, University Autonoma of Madrid, Ctra. Colmenar km 15, 28049, Madrid, Spain,
Environ Sci Pollut Res Int. 2014 Nov;21(21):12129-34. doi: 10.1007/s11356-014-2880-1. Epub 2014 Apr 26.
The treatment of a non-biodegradable agrochemical wastewater has been studied by coupling of preliminary coagulation-flocculation step and further Fenton oxidation. High percentages of chemical oxygen demand (COD) removal (up to 58 %) were achieved in a first step using polyferric chloride as coagulant. This reduced significantly the amount of H2O2 required in the further Fenton oxidation. Using the stoichiometric amount relative to COD around 80 % of the remaining organic load was mineralized. The combined treatment allowed achieving the regional discharge limits of ecotoxicity at a cost substantially lower than the solution used so far where these wastewaters are managed as hazardous wastes.
通过将初步混凝-絮凝步骤与进一步的芬顿氧化相结合，对一种不可生物降解的农用化学废水处理进行了研究。第一步使用聚合氯化铁作为混凝剂，实现了高比例的化学需氧量（COD）去除（高达58%）。这显著减少了进一步芬顿氧化所需的过氧化氢量。使用相对于COD的化学计量用量，约80%的剩余有机负荷被矿化。这种联合处理能够以远低于目前将这些废水作为危险废物处理的解决方案的成本达到区域生态毒性排放限值。
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