Katsoyiannis Athanasios, Samara Constantini
Aristotle University of Thessaloniki, Department of Chemistry, Environmental Pollution Control Laboratory, Thessaloniki GR-54124, Greece.
J Hazard Mater. 2007 Mar 22;141(3):614-21. doi: 10.1016/j.jhazmat.2006.07.038. Epub 2006 Jul 25.
The LUMISTox toxicity test was employed to assess the removal of municipal wastewater toxicity during the biological treatment with activated sludge in the wastewater treatment plant of Thessaloniki, Greece. Possible associations of toxicity data with chemical parameters of organic pollution of wastewaters, namely BOD(5), COD, DOC, SS and persistent organic pollutants (POPs) were also investigated. Toxicity and chemical parameters were concurrently measured at three sampling points of the treatment plant, the entrance of the unit (raw wastewater, RW), the effluent of the secondary sedimentation tank (SSE), and the final sewage sludge (FS). Substantial reduction of toxicity was observed from RW to SSE (mean+/-S.D. of bioluminescence inhibition 36+/-9.4% and 13+/-4.0%, respectively) indicating removal of toxicants during primary and secondary clarification, also suggesting that a large part of the toxicity measured is attributed to the biodegradable fraction of the organic content of wastewater. Significant positive correlations were observed between % inhibition values and wastewater parameters (BOD, COD, SS). In sludge, correlations were in general poor. Negative strong correlation was observed between EC(20/15) and TOC suggesting that the organic content of sludge contributes to the toxicity measured. Toxicity was positively correlated with the concentrations of certain POPs in RW, while weaker negative correlations were observed in SSE. Correlations in sewage sludge were less significant. It was concluded that toxicity testing is a useful tool supplementing chemical analyses in the evaluation of the potential hazard from effluent discharges and disposal of waste sludge.
采用LUMISTox毒性试验评估了希腊塞萨洛尼基污水处理厂活性污泥生物处理过程中城市污水毒性的去除情况。还研究了毒性数据与废水有机污染化学参数（即生化需氧量（BOD₅）、化学需氧量（COD）、溶解性有机碳（DOC）、悬浮物（SS）和持久性有机污染物（POPs））之间的可能关联。在处理厂的三个采样点同时测量了毒性和化学参数，分别是单元入口（原废水，RW）、二次沉淀池出水（SSE）和最终污水污泥（FS）。从RW到SSE观察到毒性大幅降低（生物发光抑制的平均值±标准差分别为36±9.4%和13±4.0%），这表明在初次和二次澄清过程中有毒物质被去除，也表明所测得的大部分毒性归因于废水有机成分的可生物降解部分。观察到抑制率百分比与废水参数（BOD、COD、SS）之间存在显著正相关。在污泥中，相关性总体较差。观察到EC(20/15)与总有机碳（TOC）之间存在强负相关，这表明污泥中的有机成分导致了所测得的毒性。毒性与RW中某些POPs的浓度呈正相关，而在SSE中观察到较弱的负相关。污水污泥中的相关性不太显著。得出的结论是，毒性测试是评估废水排放和污泥处置潜在危害时补充化学分析的有用工具。
