Eker Serkan, Kargi Fikret
Department of Environmental Engineering, Dokuz Eylul University, Tinaztepe Campus Buca, 35160 Izmir, Turkey.
Chemosphere. 2006 Aug;64(9):1609-17. doi: 10.1016/j.chemosphere.2005.11.030. Epub 2006 Jan 3.
Biofilm processes offer considerable advantages for biological treatment of chlorophenol containing wastewaters since such industrial effluents are difficult to treat by conventional activated sludge processes. A rotating perforated tubes biofilm reactor (RTBR) was developed and used for treatment of 2,4-dichlorophenol (DCP) containing synthetic wastewater. Effects of COD and DCP loading rates on COD, DCP and toxicity removals were investigated. Percent COD removal decreased and effluent COD increased with increasing COD and DCP loading rates due to toxic effects of high DCP content in the feed. DCP and toxicity removals showed similar trends. As the DCP loading rate increased the effluent DCP content increased yielding high toxicity levels in the effluent. COD and DCP loading rates should be below 90gCODm(-2)d(-1) and 2.8gDCPm(-2)d(-1) in order to obtain more than 90% DCP and toxicity removals. However, DCP loading rates lower than 1gDCPm(-2)d(-1) are required to obtain more than 90% COD removal. Empirical equations were developed to estimate percent COD, DCP and toxicity removals as functions of COD and DCP loading rates. The coefficients of the empirical equations were determined by using the experimental data. Empirical model predictions for percent COD, DCP and toxicity removals were in good agreement with the experimental data.
生物膜工艺为含氯酚废水的生物处理提供了相当大的优势，因为这类工业废水难以用传统的活性污泥工艺进行处理。开发了一种旋转穿孔管生物膜反应器（RTBR），并用于处理含2,4 - 二氯酚（DCP）的合成废水。研究了化学需氧量（COD）和DCP负荷率对COD、DCP去除及毒性去除的影响。由于进料中高含量DCP的毒性作用，随着COD和DCP负荷率的增加，COD去除率降低，出水COD增加。DCP和毒性去除呈现相似趋势。随着DCP负荷率的增加，出水DCP含量增加，导致出水中毒性水平升高。为了获得超过90%的DCP和毒性去除率，COD和DCP负荷率应分别低于90gCODm(-2)d(-1)和2.8gDCPm(-2)d(-1)。然而，要获得超过90%的COD去除率，需要DCP负荷率低于1gDCPm(-2)d(-1)。建立了经验方程来估计COD、DCP和毒性去除率与COD和DCP负荷率之间的函数关系。利用实验数据确定了经验方程的系数。COD、DCP和毒性去除率的经验模型预测结果与实验数据吻合良好。
