皮革废水经微电解-SBR处理后的综合毒性变化

选择蛋白核小球藻（Chlorella pyrenoidosa Chick）为供试藻种，采用藻类急性毒性试验考察皮革废水经微电解-SBR工艺处理后的综合毒性变化情况。结果表明，皮革废水经微电解-SBR工艺处理后，其综合毒性显著降低。分别以细胞数和活体叶绿素a含量计算得到的原水、微电解出水和SBR出水的EbC50值和EeC50值依次为16.6%、19.3%、52.6%和13.0%、15.6%和52.1%。根据Bulich提出的毒性等级划分原则，经处理后最终出水的毒性级别由原水的Ⅰ级降为Ⅱ级。

Change of comprehensive toxicity of tannery wastewater through microelectrolysis-SBR treatment

A species of typical freshwater algae-Chlorella pyrenoidosa Chick was selected as the experimental materials to investigate the change of comprehensive toxicity of tannery wastewater through microelectrolysis-SBR treatment by algae acute toxicity test. The toxicity of tanning wastewater was significantly reduced after the treatment process. Through calculation of cell number and living chlorophyll-a content, the values of E_bC_(50) and E_eC_(50) were 16. 6% and 13. 0% for raw water, 19. 3% and 15. 6% for micro-electrolysis effluent and 52. 6% and 52. 1% for SBR effluent, respectively. According to the principle for toxicity grade dividing given by Bulich, the toxicity level decreased from first order for raw water to second order for final effluent.