Abstract Advanced automotive fleet repair facility wastewater treatment was investigated with Zero-Valent Iron/Hydrogen Peroxide (Air/ZVI/H2O2) process for different process parameters: ZVI and H2O2 doses, time, pH. The highest Chemical Oxygen Demand (COD) removal efficiency, 76%, was achieved for ZVI/H2O2 doses 4000/1900 mg/L, 120 min process time, pH 3.0. COD decreased from 933 to 227 mg/L. In optimal process conditions odor and color were also completely removed. COD removal efficiency was increasing with ZVI dose. Change pH value below and over 3.0 causes a rapid decrease in the treatment effectiveness. The Air/ZVI/H2O2 process kinetics can be described as d[COD]/dt = −a [COD]tm, where ‘t’ corresponds with time and ‘a’ and ‘m’ are constants that depend on the initial reagent concentrations. H2O2 influence on process effect was assessed. COD removal could be up to 40% (560 mg/L) for Air/ZVI process. The FeCl3 coagulation effect was also evaluated. The best coagulation results were obtained for 700 mg/L Fe3+ dose, that was slightly higher than dissolved Fe used in ZVI/H2O2 process. COD was decreased to 509 mg/L.

中文翻译：

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使用空气/ZVI 和空气/ZVI/H2O2 工艺的汽车车队维修设施废水处理

摘要 使用零价铁/过氧化氢 (Air/ZVI/H2O2) 工艺对不同工艺参数：ZVI 和 H2O2 剂量、时间、pH 值对先进的汽车车队维修设施废水处理进行了研究。ZVI/H2O2 剂量为 4000/1900 毫克/升、处理时间为 120 分钟、pH 值为 3.0 时，化学需氧量 (COD) 去除效率最高，为 76%。COD 从 933 降至 227 mg/L。在最佳工艺条件下，气味和颜色也被完全去除。COD 去除效率随着 ZVI 剂量的增加而增加。改变 pH 值低于和高于 3.0 会导致治疗效果迅速下降。Air/ZVI/H2O2 过程动力学可以描述为 d[COD]/dt = -a [COD]tm，其中“t”对应于时间，“a”和“m”是取决于初始试剂浓度的常数. 评估了 H2O2 对工艺效果的影响。对于 Air/ZVI 工艺，COD 去除率最高可达 40% (560 mg/L)。还评估了 FeCl3 凝结效果。在 700 mg/L Fe3+ 剂量下获得了最好的混凝结果，略高于 ZVI/H2O2 工艺中使用的溶解铁。COD 降至 509 mg/L。