复合藻-菌系统水质净化模型建立与净化养殖水体水质的研究

Study on Establishment of Water Purification Model of Alga-bacteria System and Its Application in Purifing the Deteriorated Aquacultural Water

采用正交法建立了由栅藻(Scencdesmus obliquus)、小球藻(Chlorella vulgans)、亚硝化细菌(Nitritebacteria)、硝化细菌(Nitrate bacteria)组成的复合藻-菌净化系统去除氨态氮和亚硝酸态氮的最优化模型,确定了单胞藻与细菌的最优化数量配比关系,即栅藻∶小球藻∶亚硝酸化细菌∶硝化细菌=2.13∶1∶2.38∶3.73。利用该系统模型与单藻、单菌去除池塘老化水体中的氨态氮、亚硝酸态氮显示:去除氨态氮和亚硝酸态氮的效率远远高于单藻、单菌,其去除率分别为97.3%和68.8%。同时该系统模型还具有增加养殖水体溶解氧的作用,可使水体中的溶解氧在试验设定的参数中短时间达到9.7 mg.L-1,并可为水产动物提供1.6×106CFU.mL-1的天然藻类饵料。

The optimized water purification model of alga-bacteria system which consists of Scencdesmus obliquu , Chlorella vulgans , Nitrite bacteria and Nitrate bacteria applied to remove NH4^＋--N and NO2 -N was established according to the orthogonal test design. The optimum microorganism ratio of Scencdesmus obliquu , Chlorella vulgans , Nitrite bacteria and Nitrate bacteria was 2.13 ： 1 ： 2.38 ： 3.73. In comparison with single algae and bacteria, the effect of the established model to remove NH4 ^＋-N and NO2 ^-N was better,its removing rate was 97.3% and 68.8% respectively . The dissolved oxygen concentration in aquacultural water could be largely raised by the established model, which reached to 9.7 mg· L^-1 , Meanwhile , the model could provide 1.6 × 10^6 CFU · mL^-1 aglae for cultured aquatic animal.