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首页> 外文期刊>Journal of Cleaner Production >Treatment of actual slaughterhouse wastewater by combined anaerobic-aerobic processes for biogas generation and removal of organics and nutrients: An optimization study towards a cleaner production in the meat processing industry
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Treatment of actual slaughterhouse wastewater by combined anaerobic-aerobic processes for biogas generation and removal of organics and nutrients: An optimization study towards a cleaner production in the meat processing industry

机译：厌氧-好氧相结合工艺处理实际屠宰场废水以产生沼气并去除有机物和营养物质：肉类加工行业清洁生产的优化研究

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Environmental protection initiatives and the increasing market demands for green practices are driving the meat processing industry to consider sustainable methods for wastewater treatment since slaughterhouse wastewater (SWW) is seen as detrimental worldwide. Thus, on-site treatment is the preferred option to treat the slaughterhouse effluents for water reuse and potential energy recovery due to the conversion of organics into biogas. The treatment of an actual SWW is studied in a combined biological system, including aerobic and anaerobic processes. An anaerobic baffled reactor (ABR) followed by an aerobic activated sludge (AS) reactor are used in continuous mode at laboratory scale. Response surface methodology (RSM) is used for the process optimization to maximize biogas yield and to remove the total organic carbon (TOC) and total nitrogen (TN) while minimizing the total suspended solids (TSS) residuals. The effects of the flow rate, the pH, the influent TOC concentration, and their interactions on the overall treatment efficiency as well as the biogas yield are studied. Maximum TOC and TN removals of 85.03 and 72.10%, minimum TSS residual of 19.54 mg/L, and maximum biogas yield of 116.56 mL/min are found at the optimum operating conditions of the influent TOC concentration of 343 mg/L, the feed flow rate of 63 mL/min, and the pH of 6.84. The agreement between model predictions and experimental values indicates that the proposed model could describe the performance of combined anaerobic aerobic systems for SWW treatment and the reduction of operating costs via biogas production while providing high-quality treated effluent for water reuse. (C) 2016 Elsevier Ltd. All rights reserved.
机译：环保措施和对绿色实践的不断增长的市场需求正在推动肉类加工业考虑可持续的废水处理方法，因为屠宰场废水（SWW）在世界范围内被视为有害。因此，由于有机物转化为沼气，现场处理是处理屠宰场废水的首选方案，以用于水的再利用和潜在的能量回收。实际的SWW的处理是在包括好氧和厌氧过程的组合生物系统中进行的。在实验室规模下，连续模式使用厌氧折流板反应器（ABR）和好氧活性污泥（AS）反应器。响应面方法学（RSM）用于工艺优化，以最大程度地提高沼气产量并去除总有机碳（TOC）和总氮（TN），同时将总悬浮固体（TSS）残留量降至最低。研究了流速，pH，进水TOC浓度及其相互作用对整体处理效率以及沼气产量的影响。在进水TOC浓度为343 mg / L，进料流量的最佳操作条件下，发现最大TOC和TN去除量为85.03和72.10％，最小TSS残留量为19.54 mg / L，最大沼气产量为116.56 mL / min。流速为63 mL / min，pH为6.84。模型预测与实验值之间的一致性表明，所提出的模型可以描述用于SWW处理的组合厌氧好氧系统的性能以及通过沼气生产而降低的运营成本，同时提供高质量的经处理废水用于水的再利用。 （C）2016 Elsevier Ltd.保留所有权利。

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