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为了探索采用微藻处理与综合利用技术净化工厂化海水养殖水体的可行性,研究测定了一些常用饵料微藻对水体N、P的去除能力。主要以绿色巴夫藻(Pavlova viridis)、青岛大扁藻(Platymonas sp.)、三角褐指藻(Phaeodactylum tricornutum)和塔胞藻(Pyramimonas sp.)为研究对象,首先选择起始藻细胞数量、盐度、光照和温度四种因素开展正交试验确定四种饵料微藻最优生长条件,然后在最优生长条件下研究四种饵料微藻对水体N、P的去除效果。结果表明在优化生长条件下,四种饵料微藻对工厂化海水养殖水体NH4+-N和PO43--P均具有较好去除效果,但对NO3--N去除率不高。四种饵料微藻中塔胞藻去除水体N、P能力最强,在藻细胞起始密度为1.5×105 cells/mL,盐度为20‰,光照强度为5 000 lx,温度为20℃时,经过6 d处理,对NH4+-N和PO43--P去除率均高于99%;对NO3--N的去除率为15.4%,显著的高于青岛大扁藻和绿色巴夫藻。
In order to explore the feasibility of using microalgae to treat and comprehensively purify industrialized mariculture water, the removal of N, P from some commonly used food microalgae was studied. Pavlova viridis, Platymonas sp., Phaeodactylum tricornutum and Pyramimonas sp. Were selected as the research objects. The number of initial algae cells, Salinity, light and temperature to determine the optimal growth conditions of four kinds of food microalgae. Then under the optimal growth conditions, the removal efficiencies of four kinds of food microalgae on N and P of water were studied. The results showed that all four kinds of bait microalgae had good removal efficiency for NH4 + -N and PO43 - P in industrialized mariculture water under optimal growth conditions, but the removal rate of NO3 - N was not high. Among the four kinds of bait microalgae, Thalassiosperm was the strongest in removing N and P from water, with an initial cell density of 1.5 × 105 cells / mL, a salinity of 20 ‰, a light intensity of 5000 lx and a temperature of 20 ℃ After 6 days treatment, the removal rates of NH4 + -N and PO43 - P were higher than 99%. The removal rate of NO3 - N was 15.4%, which was significantly higher than that of P. zingiberensis and P. aeruginosa.