Guo Junyuan, Ma Jing
College of Resources and Environment, Chengdu University of Information Technology, Chengdu, Sichuan 610225, China.
College of Resources and Environment, Chengdu University of Information Technology, Chengdu, Sichuan 610225, China.
Bioresour Technol. 2015 Nov;196:736-40. doi: 10.1016/j.biortech.2015.07.113. Epub 2015 Aug 4.
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 3.4×10(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 20mg/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.
研究了碱热（ALT）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。当与这种ALT预处理污泥一起培养时，典型的废水活性污泥的干固体（DS）和比过滤阻力（SRF）分别达到22.5%和3.4×10¹²m/kg, 这比使用传统化学絮凝剂时要好得多。当生物絮凝剂和传统的聚合氯化铝（PAC）同时使用时，污泥脱水效果进一步改善。电荷中和和颗粒间架桥被认为是联合使用时性能增强的原因。对于猪废水，当在pH 8.0下与20mg/L生物絮凝剂一起培养时，可去除45.2%的化学需氧量（COD）、41.8%的铵和74.6%的浊度。这项研究表明，在污泥脱水和猪废水预处理中，ALT预处理污泥作为传统絮凝剂的替代生物絮凝剂具有巨大潜力。
