CSIRO Land and Water, Western Australia, Australia; Department of Civil Engineering, Curtin University, Western Australia, Australia.
CSIRO Land and Water, Western Australia, Australia.
Bioresour Technol. 2017 Dec;245(Pt A):890-898. doi: 10.1016/j.biortech.2017.08.157. Epub 2017 Aug 30.
This work aimed to study the feasibility of using bioelectrochemical systems (BES) for organics removal under alkaline-saline and nitrogen (N) deficient conditions. Two BES inoculated with activated sludge were examined for organics (oxalate, acetate, formate) oxidation under alkaline-saline (pH 9.5, 25g/L NaCl) and N deficient conditions. One reactor (R1) received ammonium chloride as an N-source, while the other (R2) without. The reactors were initially loaded with only oxalate (25mM), but start-up was achieved only when acetate was added as co-substrate (5mM). Maximum current were R1: 908A/m (organic removal rate (ORR) 4.61kgCOD/m·d) and R2: 540A/m (ORR 2.06kgCOD/m·d). Formate was utilised by both anodic biofilms, but the inefficient oxalate removal was likely due to the paucity of microorganisms that catalyse decarboxylation of oxalate into formate. Further development of this promising technology for the treatment of alkaline-saline wastewater is warranted.
本研究旨在探索在碱性-盐度和氮（N）缺乏条件下利用生物电化学系统（BES）去除有机物的可行性。采用两种接种有活性污泥的 BES，在碱性-盐度（pH9.5，25g/L NaCl）和 N 缺乏条件下对有机物（草酸盐、醋酸盐、甲酸盐）进行氧化研究。一个反应器（R1）以氯化铵作为 N 源，而另一个（R2）则没有。反应器最初仅加载草酸盐（25mM），但仅当添加醋酸盐作为共底物（5mM）时才实现启动。R1 的最大电流为 908A/m（有机去除率（ORR）4.61kgCOD/m·d），R2 的最大电流为 540A/m（ORR 2.06kgCOD/m·d）。两种阳极生物膜都能利用甲酸盐，但草酸盐去除效率较低，可能是因为缺乏能催化草酸盐脱羧生成甲酸盐的微生物。因此，有必要进一步开发这项有前景的技术，以处理碱性盐度废水。
