Applied Study On Treatment Of Wastewater Containing Copper By Alga

Primary applied study on treatment of wastewater containing copper by single cell alga is mainly carried out in this article. ?The result indicates that in the culture medium of the aquatic No.4 the order of the growing rate of Chlorella pyrenoidosa,Scendesmus obliquus,Closteridium lunula and Micro cytis aeruginosa is Chlorella pyrenoidosa>Closteridium lunu?a>Scendesmus obliquus>Microcytis aeruginosa. ?By the standard method of the toxicity test of toxic chemical to alga, the toxicity order of copper to the three alga is obtained, which is Scendesmus obliquus> Chlorella pyrenoidosa> Closteridium lunula. ?By the experiment that Chlorella pyrenoidosa, Scendesmus obliquus, Closteridium lunula absorb copper, which lasts six days, it is found that the ability of Chlorella pyrenoidosa absorbing copper is the strongest, and the absorbing quantity in the first day is 2.36glmg, and the order of the ability of alga absorbing copper is Chlorella pyrenoidosa > Scendesmus obliquus > Closteridium lunula. ?During the experiment of Chlorella pyrenoidosa absorbing copper in short time, it is found that the absorbing course accords with the formula of Freunlich; when the PH is in the range of 4?, the ability of Chlorella pyrenoidosa absorbing copper becomes strong with the PH becomes high; and when Chlorla pyrenoidosa absorbs copper, the concentration of the ion of copper should not be higher than 500mgIl. ?FeC!3 can be used as flocculating agent to separate Chlorella pyrenoidosa from water, the best using quantity of FeCl3 is O.02～.O5mg/lor so, and the use of FeC13 will not affect the course of Chlorella pyrenoidosa absorbing copper.