Study On Immobilized Chlorella Vulgaris And Its Efficiency On Using N And P

In this study it is reported for method of modified PVA—boric acidimmobilization of Chlorella sp uing SA&PVA. And using immobilized Chlorellavulgaris gels for purinfying emulation waste water(densities of N.P are 30 mg/L&10mg/L).Modified PVA—boric acid immobilization is simple, and the gel beads formedare not adhesive, with less biological toxicity, higher mechanical strength and goodtransparency. Some disadvantages of the existing PVA immobilization entrapping areavoided.After 3 experiment circles, the removal rate of N,P can reach 85%&94.7%,which outclass the Chlorella vulgaris in suspension.At end of the experiment, the PVA gel beads has almost the same removal ratewith SA gel beads, and does not decrease evidently. Because it has higher mechanicalstrength than SA gel beadsChlorella vulgaris immobilized in modified PVA-boric acid operation is morefitable for N, P removal than that of SA gels.