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Organics removal and protein recovery from wastewater discharged during the production of chondroitin sulfate

机译:硫酸软骨素生产过程中排出的废水中的有机物去除和蛋白质回收

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摘要

Bentonite, chitosan and polyaluminum chloride (PAC) were applied to treat wastewater discharged during the production of chondroitin sulfate and recover protein dissolved in the wastewater. The results showed that the combination of pH 9.00, 3-4 mL chitosan solution, 2 g of bentonite and 5 mL of 8% PAC solution per 100 mL of wastewater with a 4.0 h flocculation time were the optimal conditions for the recovery of protein and removal of total organic carbon (TOC) from wastewater. A pilot-scale test also was conducted, and 130 kg (dry weight) of sediment was obtained from 1.1 m~3 of discharged wastewater. This sediment contained abundant amino acids (proteins comprised 61% of the total sediment), after the recovery of protein, the dissolved TOC concentration in wastewater was decreased by approximately 80% and the residual wastewater could be readily disposed using a traditional activated sludge process.
机译:膨润土,壳聚糖和聚氯化铝(PAC)用于处理硫酸软骨素生产过程中排放的废水,并回收溶解在废水中的蛋白质。结果表明,对于絮凝时间为4.0 h的废水,每100 mL废水中pH 9.00、3-4 mL壳聚糖溶液,2 g膨润土和5 mL 8%PAC溶液的组合是回收蛋白质和蛋白质的最佳条件。去除废水中的总有机碳(TOC)。还进行了中试,从排放的1.1 m〜3废水中获得了130 kg(干重)的沉积物。该沉积物包含丰富的氨基酸(蛋白质占总沉积物的61%),回收蛋白质后,废水中溶解的TOC浓度降低了约80%,残留的废水可以使用传统的活性污泥法轻松处理。

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