固定化与游离态小球藻脱氮除磷对比以及金属镉对吸收磷速率的影响  

Contrast Research on Removal of Phosphorous and Nitrogen by Immobilized and Free Chlorella Vulgaris as well as the Metal Cadmium on the Absorption Rate of Phosphorous

作　　者：颜胜华[1] 鲁敏[1] 陆世雄[1] 丁忠浩[1] 曾庆福[1] 

机构地区：[1]武汉科技学院环境与城建学院,湖北武汉430073

出　　处：《纺织科技进展》2009年第5期10-14,共5页Progress in Textile Science & Technology

摘　　要：对固定化与游离态小球藻脱氮、除磷进行对比研究，结果表明固定化藻在两天内对NH4^＋-N和PO4^3- -P的净化效率比悬浮态藻分别高22．49％和35．25％。固定化藻技术不仅保留了悬浮态藻的优点，而且使得藻对氮、磷的去除率有较大的提高。另外，研究了不同光照强度及不同pH值下，小球藻在悬浮和固定状态下镉对污水中正磷酸盐的吸收速率的影响。结果表明，在不同光照强度下，镉总体上降低了小球藻对磷的吸收速率。不同pH值时，无论在悬浮态还是固定态，镉能使小球藻对磷的吸收速率下降20％～30％，由此可见固定处理并没有减少镉的影响。Researching on immobilized and free cell cultures, the experimental results showed that immobilized chlorella vulgar has higher removal efficiency to NH4^＋ --N and PO4^3- --P than free cell in two days, it is more than 22.49% of NH4^＋ --N and 35. 25% of PO4^3- --P which are removed by immobilized ehlorella. The merit of free algae is kept in the immobilized algae, and immobilization improves the removal of nitrogen and phosphorus, protects the algae ceils, it can increase the cell life and promotes the absorption of phosphorous and nitrogen. In addition, researching on the rate of absorption of phosphorus which compared the immobilized state with the free one in different light intensities and different pH, the results showed that under different light intensities, cadmium reduces the absorption rate of phosphorus, in most pH, whether in fixed or suspended state, cadmium can only reduce the absorption rate of phosphorus by 20% - 30%, so setting treatment does not reduce the impact of cadmium.

关 键 词：小球藻 固定游离态 脱氮除磷 镉 光照强度 pH 

分 类 号：X703[环境科学与工程—环境工程]