Jain Neeraj, Minocha A K, Verma C L
Environmental Science and Technology Division, Central Building Research Institute, Roorkee 247 667, India.
Indian J Exp Biol. 2002 Jan;40(1):101-5.
Batch studies were conducted on degradation of anaerobically digested distillery wastewater by three bacterial strains, viz. Xanthomonas fragariae, Bacillus megaterium and Bacillus cereus in free and immobilized form, isolated from the activated sludge of a distillery wastewater treatment plant. The removal of COD and colour with all the three strains increased with time up to 48 hr and only marginal increase in COD and colour removal efficiency was observed beyond this period up to 72 hr. After this period removal efficiency remained fairly constant up to 120 hr. The maximum COD and colour removal efficiency varied from 66 to 81% and 65 to 75%, respectively for both free and immobilized cells of all the three strains. The strain Bacillus cereus showed the maximum efficiency of COD (81%) and colour (75%) removal out of the three strains. An interrelationship between the percent COD and colour removal was carried out by correlation and regression analysis and was justified by high values of coefficient of correlation (r = 0.99) for all the cases. The first order removal rate kinetics was also applied and rate constants were evaluated for COD and colour removal efficiencies.
采用从一家酿酒厂废水处理厂的活性污泥中分离出的三种细菌菌株，即草莓黄单胞菌、巨大芽孢杆菌和蜡样芽孢杆菌，以游离态和固定化形式对厌氧消化的酿酒厂废水进行了批次研究。在长达48小时的时间内，这三种菌株对化学需氧量（COD）和色度的去除率均随时间增加，在此之后直至72小时，COD和色度去除效率仅略有增加。在此之后直至120小时，去除效率保持相当稳定。所有三种菌株的游离态和固定化细胞对COD的最大去除效率在66%至81%之间，对色度的最大去除效率在65%至75%之间。在这三种菌株中，蜡样芽孢杆菌对COD的去除效率最高（81%），对色度去除效率最高（75%）。通过相关性和回归分析对COD去除率百分比和色度去除率之间的相互关系进行了研究，所有情况下高相关系数值（r = 0.99）证明了这种关系。还应用了一级去除速率动力学，并评估了COD和色度去除效率的速率常数。
