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首页> 外文期刊>Journal of water reuse and desalination >Cork industry wastewater characterization: assessment of the biodegradability, reuse and of the relationship between BOD, COD and tannins with TOC
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Cork industry wastewater characterization: assessment of the biodegradability, reuse and of the relationship between BOD, COD and tannins with TOC

机译：软木工业废水的表征：利用TOC评估生物降解性，再利用以及BOD，COD和单宁之间的关系

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摘要

Cork processing involves a boiling step to make the cork softer, which consumes a high volume of water and generates a wastewater with a high organic content, rich in tannins. An assessment of the final wastewater characteristics and of the boiling water composition along the boiling process was performed. The parameters studied were pH, color, total organic carbon (TOC), chemical and biochemical oxygen demands (COD, BOD5, BOD20), total suspended solids (TSS), total phenols and tannins (TP, TT). It was observed that the water solutes extraction power is significantly reduced for higher quantities of cork processed. Valid relationships between parameters were established not only envisaging wastewater characterization but also to provide an important tool for wastewater monitoring and for process control/optimization. Boiling water biodegradability presented decreasing values with the increase of cork processed and for the final wastewater its value is always lower than 0.5, indicating that these wastewaters are very difficult to treat by biological processes. The biodegradability was associated with the increase of tannin content that can rise up to 0.7 g/L. These compounds can be used by other industries when concentrated and the clarified wastewater can be reused, which is a potential asset in this wastewater treatment.
机译：软木塞加工涉及沸腾步骤，以使软木塞更软，这会消耗大量的水，并产生有机酸含量高，单宁丰富的废水。对最终废水的特性和沸腾过程中的沸水成分进行了评估。研究的参数为pH，颜色，总有机碳（TOC），化学和生化需氧量（COD，BOD5，BOD20），总悬浮固体（TSS），总酚和单宁（TP，TT）。可以观察到，随着处理的软木塞数量增加，水溶质的提取能力显着降低。建立了参数之间的有效关系，不仅可以对废水进行表征，而且可以为废水监测以及过程控制/优化提供重要的工具。沸水的生物降解性随所处理的软木塞数量的增加而呈现递减的值，而最终废水的价值始终低于0.5，这表明这些废水很难通过生物过程进行处理。生物降解性与单宁含量的增加有关，单宁含量可以上升到0.7 g / L。这些化合物在浓缩后可以被其他行业使用，并且澄清的废水可以重复使用，这是该废水处理的潜在资产。

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