双效工程菌Y1溶藻产物的急性毒性与健康风险评估
Acute toxicity of the algae-lying products and assessment on health risks of microcystin in drinking water sources

为检测溶藻、藻毒素降解双效工程菌Y1溶藻产物的生物毒性，采用发光细菌测定急性毒性，利用USEPA推荐模型对水源水进行健康风险评估。结果表明，Y1溶藻菌液能有效地抑制铜绿微囊藻的生长，并对发光细菌具有轻微的毒性。当叶绿素a浓度为34.92 mg/m3时，增加投加量会使藻液毒性加强；当叶绿素a浓度大于46.56 mg/m3时，加菌后藻液毒性明显降低。水源水中MC-LR的非致癌风险值为2.89~4.87，通过BAF处理后能减少到1.3，而加Y1菌强化后得到的0.6达到了健康风险评估安全标准。UV254与致突变强度的预测模型表明经过处理的水中有机物致突变性，说明Y1应用于水源水生物毒性和致突变风险。
In order to detect the toxicity of algicidal products and valuate the harm of microcystin in the water source to the human body, the luminescent bacteria was to determine the toxicity, USEPA recommended model provided a health risk assessment of source water. The results show that the strain Y1 inhibit the growth of microcystis aeruginosa effectively. The strain had a slight toxicity to the luminescent bacteria. When the concentration of chlorophyll a was 34.92 mg/m3, the increase of dosage could enhance the toxicity of algae. The toxicity of liquid algae added bacteria was significantly lower than that of the control group, when the concentration of chlorophyll a was greater than 46.56 mg/m3. The non carcinogenic risked index of MC-LR in the water source was 2.89~4.87, which was reduced to 1.3 after BAF treatment, even to 0.6 after adding strain Y1. It reached health risk assessment safety standards when the the value was less than 1. Through the prediction model, it was found that the organic matter in treated water had no mutagenicity, it indicated that waters with strain Y1 had not biotoxicity and mutagenicity.