School of Applied Sciences, Faculty of Integrated Life Sciences, Quest International University, Ipoh, Malaysia.
Sustainable Engineering Technology Research Centre (SETechRC), Faculty of Engineering Technology, University Tun Hussein Onn Malaysia, Pagoh, Malaysia.
Int J Phytoremediation. 2022;24(13):1431-1443. doi: 10.1080/15226514.2022.2033688. Epub 2022 Feb 7.
Microalgae cultivation is well known as a sustainable method for eco-friendly wastewater phycoremediation and valuable biomass production. This study investigates the feasibility and kinetic removal of organic compounds and nutrients from food processing wastewater (FPW) using sp. in an enclosed photobioreactor. Simultaneously, response surface methodology (RSM) via face-centered central composite design (FCCCD) was applied to optimize the effects of alum and chitosan dosage and pH sensitivity on flocculation efficiency. The maximum growth rate of sp. cultivated in FPW was 1.83 mg daywith the highest removal of chemical oxygen demand (COD), total organic carbon (TOC), and total phosphorus (TP) after 12 days of phycoremediation of 96.1%, 87.2%, and 35.4%, respectively. A second-order polynomial function fits well with the experimental results. Both coagulant dosage and pH significantly ( < 0.05) affect the flocculation efficiency of sp. biomass cultivated in FPW. The highest flocculation efficiency (92.4%) was obtained at a dosage of 166 mg Land pH 12 for alum coagulant, while 94.9% flocculation efficiency was achieved with optimum chitosan dosage and pH of 30 mg Land 5.54, respectively. In general, sp. shows a great removal efficiency of FPW contamination, whereas RSM provides excellent analysis for biomass harvesting optimization using a flocculation technique.
微藻培养以其生态友好型废水光生物修复和有价值的生物质生产能力而闻名。本研究采用 sp. 在封闭光生物反应器中从食品加工废水中去除有机化合物和营养物质的可行性和动力学。同时，通过面心中央复合设计（FCCCD）应用响应面法（RSM）优化了明矾和壳聚糖剂量以及 pH 敏感性对絮凝效率的影响。 sp. 在 FPW 中的最大生长速率为 1.83 mg day-1，经过 12 天的光生物修复后，COD、TOC 和 TP 的去除率分别达到 96.1%、87.2%和 35.4%。二次多项式函数很好地拟合了实验结果。混凝剂剂量和 pH 均显著（ < 0.05）影响在 FPW 中培养的 sp.生物质的絮凝效率。在明矾混凝剂的剂量为 166 mg L 和 pH 为 12 时，获得了最高的絮凝效率（92.4%），而在最佳壳聚糖剂量和 pH 为 30 mg L 和 5.54 时，获得了 94.9%的絮凝效率。总的来说， sp. 对 FPW 污染具有很强的去除效率，而 RSM 为使用絮凝技术优化生物质收获提供了很好的分析。
