Lohi A, Alvarez Cuenca M, Anania G, Upreti S R, Wan L
Laboratory of Water and Wastewater Treatment Technologies, Department of Chemical Engineering, Ryerson University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada.
J Hazard Mater. 2008 Jun 15;154(1-3):105-11. doi: 10.1016/j.jhazmat.2007.10.001. Epub 2007 Oct 6.
Aerobic biodegradation of diesel fuel (DF)-contaminated wastewater is carried out in a three-phase fluidized bed reactor under unsteady and steady state conditions. The solid phase lava rock particles, which act as the support for the biomass, are fluidized by the upward flows of influent wastewater, and air. The results show that the reactor under unsteady state operation achieved 100% DF removal from synthetic wastewater loaded with 0.43-1.03 kg/m3 day of DF. An average of over 97% of the influent chemical oxygen demand (COD) was also removed from the wastewater with COD concentrations in the range, 547-4025 mg/L. For influent COD concentrations up to 1345 mg/L, the removal is greater than 90%. Under steady state operation, the reactor was able to remove 100% of the DF, and an average of 96% of the COD from the wastewater. It had approximately 200 mg/L of DF, and 1237 mg/L of COD at a low hydraulic residence time of 4 h. In general, the results demonstrate that the reactor is very efficient, and requires short residence times to remove both DF and COD from heavily contaminated wastewater.
在非稳态和稳态条件下，在三相流化床反应器中对受柴油燃料（DF）污染的废水进行好氧生物降解。作为生物质载体的固相熔岩岩石颗粒被进水废水和空气的向上流动流化。结果表明，在非稳态运行下，该反应器能从装载量为0.43 - 1.03 kg/m³·天的合成废水中实现100%的DF去除。对于化学需氧量（COD）浓度在547 - 4025 mg/L范围内的废水，平均超过97%的进水COD也被去除。对于进水COD浓度高达1345 mg/L的情况，去除率大于90%。在稳态运行下，该反应器能够去除100%的DF，并且平均从废水中去除96%的COD。在4小时的低水力停留时间下，它的DF含量约为200 mg/L，COD含量为1237 mg/L。总体而言，结果表明该反应器非常高效，并且需要较短的停留时间就能从重度污染的废水中去除DF和COD。
