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Treatment of tannery wastewater for reuse by physico-chemical processes and a membrane bioreactor

机译：物理化学过程和膜生物反应器重用制革废水的鞣制废水

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Treatment of wastewater from a tannery in Greater Ho Chi Minh City (Vietnam) was investigated on a pilot scale. After pre-treatment by the tannery that included batch-coagulation and sedimentation, the wastewater was treated by dissolved air flotation, a membrane bioreactor (MBR) and granular activated carbon (GAC) for polishing the MBR effluent. The average removal efficiency for organic substances in the MBR was 81% while total nitrogen could only be removed by 36%. The performance of the GAC column could be successfully predicted using adsorption parameters determined in laboratory experiments. A larger proportion of the organics in the MBR effluent was only weakly adsorbable, therefore the usable carbon capacity was limited as confirmed by the modelling approach. The results were used to outline the size of a technical plant with a volumetric loading rate of 3 kg COD/(m3*d) for the MBR and a specific carbon demand of about 1.8 kg/m3.
机译：试点规模研究了从Ho Chi Minh City（越南）的制革厂处理废水。通过包括分批凝固和沉降的制革器预处理后，废水通过溶解的空气浮选，膜生物反应器（MBR）和粒状活性炭（GAC）处理，用于抛光MBR流出物。 MBR中有机物质的平均去除效率为81％，同时只能除去36％的总氮。可以使用在实验室实验中确定的吸附参数来成功预测GAC列的性能。 MBR流出物中的有机物比例较大仅为弱可吸收，因此可用的碳容量受到通过建模方法的确认。结果用于概述具有3kg COD /（M3 * D）的体积加载速率的技术植物的大小，以及约1.8kg / m3的特定碳需求。

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