摘要
研究固定化小球藻与活性污泥的共生系统对含锌废水中Zn2+的去除效果,分析菌藻状态、初始Zn2+浓度、pH、固定化菌藻小球投加量和菌藻体积比等5个因素对固定化菌藻共生系统去除Zn2+的影响。结果表明,固定化活性污泥、固定化小球藻和固定化菌藻对Zn2+的去除效果均优于悬浮小球藻,其中固定化菌藻对Zn2+的去除效果最好;废水中初始Zn2+浓度小于100 mg/L时,固定化菌藻系统对废水中Zn2+的去除率达到90.5%;固定化菌藻系统去除废水中Zn2+的最佳条件是:初始Zn2+浓度为80 mg/L,pH=7,固定化小球投加量为80 mL,菌藻体积比为1∶2。
The removal efficiency of zinc ions from wastewater was researched using an immobilized chlo- rella-activated sludge symbiotic system as the adsorbent. The effects of various factors were analyzed,including the status of bacteria and algae,initial wastewater zinc concentrations,pH values,adding quantity of immobilized bacteria-algae balls and the volume ratio of bacteria and algae. The results showed that, Zn2 ＋ removal effieiencies of the immobilized activated sludge system,immobilized chlorella system and the immobilized chlorella-activated sludge system were better than the suspended chlorella system,with the immobilized chlorella-sludge system being the highest; the removal rate of Zn2＋ by the immobilized chloreUa-activated sludge system reached 90.5% when the initial Zn2＋ concentration was less than 100 mg/L; the optimal conditions for Zn2＋ removal by the immobi- lized chlorella-activated sludge system are initial zinc concentration of 80 mg/L, pH value of 7,adding quantity of 80 mL, and volume ratio for bacteria and algae of 1 ： 2.
出处
《环境工程学报》
CAS
CSCD
北大核心
2014年第4期1379-1384,共6页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(51109181)
福建省教育厅科技项目(JA11236)
福建省高校杰出青年科研人才培育计划(JA12243)
关键词
含锌废水
固定化菌藻
小球藻
活性污泥
zinc-containing wastewater
immobilization of algal and bacteria
chlorella
activated sludge
