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首页> 外文期刊>Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies >Bioflocculant from pre-treated sludge and its applications in sludge dewatering and swine wastewater pretreatment
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Bioflocculant from pre-treated sludge and its applications in sludge dewatering and swine wastewater pretreatment

机译：预处理污泥中的生物絮凝剂及其在污泥脱水和猪废水预处理中的应用

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Potentials of alkaline-thermal (ALT) pre-treated sludge as a bioflocculant were studied in sludge dewatering and swine wastewater pretreatment. When incubated with this ALT pre-treated sludge, dry solids (DS) and specific resistance to filtration (SRF) of typical wastewater activated sludge reached 22.5% and 3.4 x 10(12) m/kg, respectively, which were much better than that obtained with conventional chemical flocculants. Sludge dewatering was further improved when both the bioflocculant and conventional polyaluminum chloride (PAC) were used simultaneously. Charge neutralization and inter-particle bridging were proposed as the reasons for the enhanced performance in the case of the combined use. With swine wastewater, the bioflocculant could remove COD, ammonium and turbidity by 45.2%, 41.8% and 74.6% when incubated with 20 mg/L at pH 8.0. This study suggested that the ALT pre-treated sludge has a great potential as an alternative bioflocculant to conventional flocculants in sludge dewatering and swine wastewater pretreatment. (C) 2015 Elsevier Ltd. All rights reserved.
机译：研究了碱热预处理污泥作为生物絮凝剂在污泥脱水和猪废水预处理中的潜力。与这种ALT预处理的污泥一起孵育时，典型的废水活化污泥的干固体（DS）和比抗过滤性（SRF）分别达到22.5％和3.4 x 10（12）m / kg，这要好得多。用常规化学絮凝剂制得。当同时使用生物絮凝剂和常规聚氯化铝（PAC）时，污泥脱水得到进一步改善。提出了电荷中和和颗粒间桥联作为组合使用情况下性能提高的原因。在猪废水中，当与20 mg / L的pH 8.0孵育时，该生物絮凝剂可去除COD，铵和浊度分别为45.2％，41.8％和74.6％。这项研究表明，在污泥脱水和猪废水预处理中，ALT预处理的污泥具有作为常规絮凝剂的替代生物絮凝剂的巨大潜力。 （C）2015 Elsevier Ltd.保留所有权利。

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