Meat production is associated with the generation of huge quantities of meat processing wastewater (MPWW) which has high concentrations of nutrients. The utilization of Scenedesmus sp. in the phycoremediation process to treat MPWW has attracted growing interest, but there is inadequate information on the management of biomass of this micro‐organism. This study aims to optimize the harvesting of Scenedesmus sp. biomass generated during phycoremediation through flocculation with alum and its potential biomass by‐product. The removal rates of the chemical oxygen demand, ammonia, total nitrogen, total phosphorus and orthophosphate were 99.16% (R² = 0.95), 97.19% (R² = 0.91), 93.91% (R² = 0.96), 97.25% (R² = 0.85) and 99.38% (R² = 0.9517), respectively. From the result, the best coagulant for recovery efficiency (97.54%) was recorded at pH 8.6 with 116.85 mg L⁻¹ alum. Three major chemical compounds – tetradecanoic, oleic and dodecanoic acids – were recorded in the extraction of Scenedesmus sp. biomass (as determined by gas chromatography‐mass spectrometry analysis; these have the potential for use in the cosmetic and medical industries. The main functional groups in the harvested biomass were OH, CH, C‐O‐C and CHCH. It can be concluded that the flocculation method was the most efficient compared to filtration process for recovering Scenedesmus sp. biomass owing to the absence of toxic by‐products. © 2020 Society of Chemical Industry (SCI)

中文翻译：

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Scenedesmus sp。的收获。在肉类加工废水的phycoremediation之后；絮凝的优化和生物质的化学分析

肉类生产与大量肉类加工废水（MPWW）的产生有关，这些废水中的养分含量很高。利用Scenedesmus sp。在phycoremediation程序中治疗MPWW引起了越来越多的兴趣，但是有关该微生物生物量管理的信息不足。这项研究旨在优化Scenedesmus sp。的收获。在phycoremediation过程中通过与明矾的絮凝及其潜在的生物质副产品产生的生物质。化学需氧量，氨，总氮，总磷和正磷酸盐的去除率分别为99.16％（R ² = 0.95），97.19％（R ² = 0.91），93.91％（R ²= 0.96），97.25％（R ² = 0.85）和99.38％（R ² = 0.9517）。从结果可以看出，使用116.85 mg L ^-1明矾在pH 8.6时，可获得最佳回收率的混凝剂（97.54％）。Scenedesmus sp。的提取中记录了三种主要化合物-十四烷酸，油酸和十二烷酸。生物质（通过气相色谱-质谱分析法确定;具有在化妆品和医疗行业中使用的潜力。收获的生物质中的主要官能团是OH，CH，C‐O‐C和CHCH。得出的结论是，与过滤工艺相比，絮凝方法是最有效的方法来回收场景石dessp。由于没有有毒的副产物而产生生物质。©2020年化学工业协会（SCI）