Abstract：
The present study aims to investigate the efficiency of a combined cheese wastewater treatment approach involving coagulation with ferric chloride coupled with a photo-Fenton-like oxidation process for potential reuse in irrigation. Laboratory-scale tests were conducted, examining the effect of various operational parameters on the treatment process. Specifically, the effects of initial wastewater pH, coagulant dosage, decantation time for the coagulation process, and initial pH, chemical oxygen demand (COD) concentration, and Fe3+ and H2O2 dosages for photo-Fenton-like oxidation were studied. Coagulation was found effective at natural pH of 6 and showed a highest removal efficiency in terms of COD (50.6%), biological oxygen demand BOD5 (42.1%), turbidity (99.3%), and least sludge volume generation (11.8% v/v) for an optimum coagulant dose of 400 mg Fe3+ L-1 and 8 h of decantation time. Thereafter, photo-Fenton-like oxidation (Fe3+/H2O2/UVA-300W) of the pretreated cheese effluent enhanced the removal of COD, BOD5 and TOC to 91.2%, 91.4%, and 97.5%, respectively, using the optimized conditions (pH = 3; [Fe3+] = 5.0 × 10-4 mol L-1; [H2O2] = 0.2 mol L-1 and tirr = 24 h). This study also shows that the proposed combined process allowed a significant phytotoxicity reduction toward lentil seed germination. The obtained outcome was encouraging and supports the possible use of the treated cheese wastewater as an additional water source for agricultural irrigation.
摘要：
本研究旨在研究一种联合奶酪废水处理方法的效率，该方法涉及与氯化铁混凝以及类似光Fenton的氧化过程，可在灌溉中重复使用。进行了实验室规模的测试，检查各种操作参数对处理过程的影响。具体来说,废水初始pH值的影响，混凝剂用量,凝结过程的倾析时间，和初始pH值，化学需氧量(COD)浓度,研究了Fe3和H2O2用于光芬顿样氧化的剂量。混凝在天然pH值为6时有效，并显示出最高的COD去除效率（50.6％），生物需氧量BOD5(42.1%)，浊度（99.3%），最佳混凝剂剂量为400mgFe3L-1和8h的倾析时间，污泥体积最小（11.8％v/v）。此后,光-Fenton-like氧化（Fe3+/H2O2/UVA-300W）的预处理的奶酪废水提高了COD的去除，BOD5和TOC达到91.2%，91.4%,97.5%,分别,使用优化的条件（pH=3；[Fe3]=5.0×10-4molL-1；[H2O2]=0.2molL-1，tirr=24h）。这项研究还表明，所提出的组合方法可以显着降低扁豆种子发芽的植物毒性。获得的结果令人鼓舞，并支持将处理过的奶酪废水用作农业灌溉的额外水源。
