Kipopoulou A M, Zouboulis A, Samara C, Kouimtzis Th
Environmental Pollution Control Laboratory, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece.
Chemosphere. 2004 Apr;55(1):81-91. doi: 10.1016/j.chemosphere.2003.11.020.
A pilot-scale treatability study was performed to evaluate the fate of lindane (gamma-hexachlorocyclohexane) in wastewater treatment plants operating in the conventional activated sludge mode. Different types of wastewater (industrial and municipal) spiked with variable lindane concentrations were used at different dosing rates in order to determine distribution and removal under various operational conditions. The major amount (67-91%) of lindane inputs to the treatment process was found to concentrate in primary sludge. A significant linear correlation between the compound's partition coefficient (logKp) and the organic fraction of primary sludge (foc) was found. Sorption on primary sludge solids was concluded to be the major removal mechanism. Only 0.1-2.8% of lindane inputs was concentrated in activated sludge. Lindane losses in primary treatment were low (4-26%). Higher losses (up to 61%) were observed during the biological treatment probably due to biodegradation. These losses were negatively correlated with the inflow rate of lindane into the aeration tank. Activated sludge aged about 23 d presented the maximum loss of lindane. Increased sludge age was associated with increased percentages of lindane in the final effluent.
开展了一项中试规模的可处理性研究，以评估林丹（γ-六氯环己烷）在采用传统活性污泥模式运行的污水处理厂中的去向。使用不同类型且林丹浓度各异的废水（工业废水和城市污水），以不同的投加量进行试验，目的是确定在各种运行条件下林丹的分布和去除情况。结果发现，进入处理工艺的林丹大部分（67-91%）集中在初沉污泥中。研究发现该化合物的分配系数（logKp）与初沉污泥的有机组分（foc）之间存在显著的线性关系。得出结论，林丹在初沉污泥固体上的吸附是主要的去除机制。进入系统的林丹只有0.1-2.8%集中在活性污泥中。初沉处理中林丹的损失较低（4-26%）。在生物处理过程中观察到较高的损失（高达61%），这可能是由于生物降解所致。这些损失与林丹流入曝气池的速率呈负相关。龄期约23天的活性污泥林丹损失最大。污泥龄增加与最终出水林丹百分比增加有关。
