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Design of an integrated membrane bioreactor process for effective and environmentally safe treatment of highly complex coffee industrial effluent
Journal of Water Process Engineering ( IF 7 ) Pub Date : 2020-06-23 , DOI: 10.1016/j.jwpe.2020.101436
Sajja S. Chandrasekhar , D. Vaishnavi , Nivedita Sahu , Sundergopal Sridhar

Food and beverage industries produce huge quantities of wastewater every day, with the coffee industry being one of the largest producers of effluents that pose grave environmental challenges due to high organic loading rate, strong odor and color. In the present study, the authors have investigated the performance of an integrated membrane bioreactor (IMBR) system using a combination of a biological process with side-steam ultrafiltration (UF) and subsequently reverse osmosis (RO) for the treatment of coffee industrial effluent. A significant reduction in chemical oxygen demand (COD) from 20,000 to 40 mg/L and turbidity from 1100 formazin attenuation unit (FAU) to 0 FAU, was achieved along with a considerable reduction in conductivity by 94 % (1.5 to 0.09 mS/cm) and total dissolved solids (TDS) by 76 %. The results revealed significant potential for meeting the acceptable range of parameters for safe disposal as specified by the central pollution control board (CPCB), while the recovered water was of a quality suitable enough for industrial reuse. A scale-up ratio of 10 from 2 L to 20 L in effluent batch size showed reproducible performance with pollutant diminution getting accelerated after 15 days to exhibit a significant removal of all pollutants, which emphasizes the effectiveness of the IMBR technology in meeting the environmental safety norms. This study reports for the first time 100 % separation of turbidity, color, and odor along with 99 % COD removal while successfully processing coffee industrial effluent. An economic estimate of a 1000 L/h capacity system confirms the commercial viability of the (IMBR) configuration.



中文翻译:

集成膜生物反应器工艺的设计,可有效,环境安全地处理高度复杂的咖啡工业废水

食品和饮料行业每天都会产生大量废水,而咖啡行业是最大的废水生产商之一,由于高有机负荷率,强烈的气味和颜色,对环境造成了严峻的挑战。在本研究中,作者研究了结合膜生物反应器(IMBR)系统的性能,该系统结合了生物过程与侧蒸汽超滤(UF)和随后的反渗透(RO)的组合来处理咖啡工业废水。化学需氧量(COD)从20,000大大降低至40 mg / L,浊度从1100甲maz衰减单元(FAU)降低至0 FAU,电导率显着降低94%(1.5至0.09 mS / cm) )和总溶解固体(TDS)降低了76%。结果表明,满足中央污染控制委员会(CPCB)规定的安全处置参数可接受范围的巨大潜力,而回收水的质量足以适合工业回用。废水批量大小从2 L到20 L的放大比例为10,显示出可重现的性能,污染物的减少在15天后加速,显示出对所有污染物的显着去除,这强调了IMBR技术在满足环境安全性方面的有效性规范。这项研究首次报道了在成功处理咖啡工业废水的同时,浊度,颜色和气味的分离率达100%,COD去除率达99%。1000 L / h容量系统的经济估算证实了(IMBR)配置的商业可行性。

更新日期:2020-06-23
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