| 摘要: | 本研究利用Microtox®生物毒性檢測不同處理廠之急毒性，包含竹溪人工溼地處理系統、安平都市污水處理廠及校園生活污水處理廠。同時，本研究亦分析Microtox®檢測值與一般水質參數之相關性，以瞭解廢水生物毒性的主要來源。
實驗結果顯示，三個不同處理廠放流水樣之急毒性皆不具毒性反應，減毒成效達100％。竹溪人工溼地進流水樣之急毒性檢測發現，12月份第一次採樣，Microtox®毒性最大值TU50，5min為3.23，TU50，15min為41.66。在南市都市污水處理廠流水樣之急毒性檢測發現，毒性值TU50，5min最大值為33.3（9月份第一次採樣），毒性值TU50，15min（6月份第一次採樣）最大值為100。這些特性，仍須進行水樣定性分析，才能確定其毒性來源及突高之原因。在校園污水處理廠進流水樣之急毒性檢測發現，UV消毒渠中有可能因為消毒後，水中化合物於高氧化狀態下轉變為有毒性物質，可能造成比進流水樣更高之生物毒性，其中最高TU50，5min達25.12。此三座污水處理廠進流水之急毒性較高為南市都市污水處理廠，高毒性佔50％，次之為校園污水處理廠，高毒性佔23％，最低為竹溪人工溼地處理系統，高毒性佔0％。
結果顯示Microtox®檢測值與一般水質參數之相關性並不高，因為水樣來源通常不會是單一物質，組成複雜，要判斷水中毒性來源仍須配合不同之研究。因此，利用化學分析配合生物監測才能有效評估水質毒性對生物之影響。
The objectives of this study were intended to investigate the acute toxicity of different treatment plants, including a wetland treatment system, a sewage treatment plant and a school sewage treatment plant by the Microtox® tests. Moreover, analysis of the primary source of acute toxicity was determined by means of linear regression for several parameters of water quality and toxicity unit (TU) of Microtox® tests.
Results indicated that the acute toxicity of three different treatment plant effluent were zero, the reduction of acute toxicity were 100％. For the acute toxicity of influent from the wetland treatment system, we found that the maximum of acute toxicity in TU50,5min is 3.23, and the TU50,15min is 41.66 in the December first sampling. The acute toxicity of influent from the sewage treatment plant, the maximum of acute toxicity in TU50,5min is 33.3 in the September first sampling, and the maximum of acute toxicity in TU50,15min is 100 in the June first sampling. We need to qualitative analysis in order to decide the primary source of acute toxicity in the distinctive sampling. The acute toxicity of influent from the school sewage treatment plant, we assay that have the acute toxicity in the canal of UV disinfection even than the acute toxicity of influent, maybe produce from residue O3. The maximum of acute toxicity in TU50,5min is 25.12 in the canal of UV disinfection. The highest acute toxicity of influent in the three treatment plant is sewage treatment plant, the high toxicity is 50％；the higher acute toxicity of influent is school sewage treatment plant, the high toxicity is 23％；the last is wetland treatment system, the high toxicity is 0％.
Results indicated the correlation in several parameters of water quality and toxicity unit (TU) of Microtox® tests are bad, due to the sources of compose are not one single matter, so we need to co-operate different analysis to determine the sampling toxicity. So, using chemical assay harmony with biomonitoring test could evaluate the effluent of water tocicity in organism. |
