固定化与游离态小球藻脱氮除磷对比研究

CONTRAST RESEARCH ON REMOVAL OF PHOSPHOROUS AND NITROGEN BY IMMOBILIZED AND FREE CHLORELLA VULGARIS

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2d内对NH4+-N和PO43--P的净化效率比悬浮态藻分别高23.14%和35.19%。固定化后初期会对藻细胞的生长产生影响,使得固定化藻的数量增长慢于悬浮态藻的生长,但在较短时间(24h左右)内细胞的活性即可恢复,并保持持续生长,这说明固定化没有对细胞产生不可恢复的损伤。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、磷的去除率有较大提高,对藻细胞起到了保护作用,延长藻细胞的生长期,有利于细胞更多地吸收氮、磷。

Research on immobilized and free cell cultures. The experimental results showed that immobilized chlorella vulgaris had higher removal efficiency to NH4^＋ -N and PO^3-4 -P than free cell; 23.14% more of NH4^＋ - N and 35.19% more of PO^3-4 - P were removed in the immobilized chloreUa. The immobilized method will influence the growth of algae at the initial stage, and the amount of the algae is lower in the immobilized system than that in free system. But the cellular viability would be restore in short time （about 24 hours） and the growth of ChloreUa vulgaris keeping a sustainable and steady development. This indicated that immobilization had a light effect on the cell. The merit of free algae is kept in the immobilized algae, and immobilization improved denitfification and phosphorus removal and protected the algae cells, it can increase the cell life and promoted absorption of phosphorous and nitrogen.