Laboratory of Advanced Materials and Process Engineering, Department of Chemistry, Faculty of Sciences, Ibn Tofaïl University, P.O. Box 14000, Kenitra, Morocco.
Laboratory of Organic Chemistry, Catalysis and Environment, Department of Chemistry, Faculty of Sciences, Ibn Tofaïl University, P.O. Box 14000, Kenitra, Morocco.
Environ Monit Assess. 2023 Aug 30;195(9):1111. doi: 10.1007/s10661-023-11726-4.
The current study focuses on investigating how to improve the efficacy of the combined process of aerated lagooning and adsorption for the treatment of olive mill wastewater (OMWW) from the olive industries in the Loukkos region using the design of experiments approach. The latter made it possible to optimize the experimental conditions, such as the mass concentration of lime, the mass concentration of powdered activated carbon (AC), and the speed of agitation (Va), which are required for the envisaged treatment, in order to control the results after the evaluation of the necessary physicochemical parameters, namely pH, total suspended solids (TSS), chemical oxygen demand (COD), rate of discoloration, and content of polyphenols. The experimental conditions necessary to carry out this study were between 1.4 and 1.75 g/l for AC, between 23 and 32 rpm for the stirring speed, and between 0.88 and 1.3 g/l for the mass concentration of lime. The results of this experiment showed that treating OMWW with the prototype II after adding lime to the mixture resulted in an estimated 85% reduction in the analyzed parameters. The pH, TSS, COD, discoloration rate, and polyphenol content were all reduced from initial values of 4.87, 0.63 (g/l), 80.3 (g (O2/l)), 0.8%, and 1.45 (g/l), respectively, to final values of 6.92, 0.12 (g/l), 12, 0.16%, and 0.25 (g/l). These results are highly significant when compared to those obtained during the treatment of prototype I using only powdered activated carbon, which showed a reduction rate of around 70%.
本研究采用实验设计方法，聚焦于如何提高充气升流式塘和吸附相结合的工艺对橄榄产业废水中橄榄加工废水（OMWW）的处理效果。该方法优化了实验条件，如石灰的质量浓度、粉末状活性炭（AC）的质量浓度和搅拌速度（Va），以控制必要的物理化学参数（即 pH 值、总悬浮固体（TSS）、化学需氧量（COD）、脱色率和多酚含量）评估后的结果。为了进行这项研究，所需的实验条件为 AC 的质量浓度在 1.4 到 1.75 g/l 之间，搅拌速度在 23 到 32 rpm 之间，石灰的质量浓度在 0.88 到 1.3 g/l 之间。实验结果表明，在混合物中添加石灰后，用原型 II 处理 OMWW，分析参数的估计去除率达到 85%。pH 值、TSS、COD、脱色率和多酚含量分别从初始值 4.87、0.63（g/l）、80.3（g（O2/l））、0.8%和 1.45（g/l）降低至最终值 6.92、0.12（g/l）、12、0.16%和 0.25（g/l）。与仅使用粉末状活性炭处理原型 I 时获得的结果相比，这些结果具有重要意义，原型 I 的去除率约为 70%。
