Eker Serkan, Kargi Fikret
Department of Environmental Engineering, Dokuz Eylul University, Buca, Izmir, Turkey.
J Hazard Mater. 2007 Jun 1;144(1-2):86-92. doi: 10.1016/j.jhazmat.2006.09.084. Epub 2006 Oct 1.
A hybrid-loop bioreactor system consisting of a packed column biofilm and an aerated tank bioreactor with effluent recycle was used for biological treatment of 2,4,6-tri-chlorophenol (TCP) containing synthetic wastewater. Effects of hydraulic residence time (HRT) on COD, TCP and toxicity removal performance of the reactor were investigated for the HRT values between 5 and 30 h, while the feed COD (2700+/-100 mgl(-1)), TCP (300+/-10 mgl(-1)) and the solids retention time (sludge age, SRT, 20 d) were constant. Percent TCP, COD and toxicity removals increased with increasing HRT resulting in more than 90% COD, TCP and toxicity removals at HRT values above 25 h. Biomass concentrations in the packed column and in the aeration tank increased with increasing HRT resulting in low reactor TCP concentrations and therefore high TCP, COD and toxicity removals at high HRT values. Volumetric and specific rates of TCP and COD removals decreased with increasing HRT due to increased biomass and decreased flow rates at high HRT levels. Volumetric and specific removal rates of COD and TCP were maximum at an HRT of 5 h.
一种由填充柱生物膜和带有出水回流的曝气池生物反应器组成的混合回路生物反应器系统，用于对含2,4,6 - 三氯苯酚（TCP）的合成废水进行生物处理。在进水化学需氧量（COD）为（2700±100mgL⁻¹）、TCP为（300±10mgL⁻¹）且固体停留时间（污泥龄，SRT，20天）保持恒定的情况下，研究了水力停留时间（HRT）在5至30小时之间时，其对反应器中COD、TCP和毒性去除性能的影响。TCP、COD和毒性的去除率随着HRT的增加而提高，在HRT高于25小时时，COD、TCP和毒性的去除率超过90%。填充柱和曝气池中的生物量浓度随着HRT的增加而增加，导致反应器中TCP浓度较低，因此在高HRT值时TCP、COD和毒性的去除率较高。由于高HRT水平下生物量增加和流速降低，TCP和COD的体积去除率和比去除率随着HRT的增加而降低。COD和TCP的体积去除率和比去除率在HRT为5小时时最高。
