Treatment Of Domestic Sewage Used By The System Composed Of Activated Sludge And Spirulina Algae

Since 1957 when Oswald puted forward algae can wipe off N P in the sewage,people attach weight to the method of treating sewage more and more. The Spirulina algae is studied by more scientist,because which include commercial value. The cost of culture of Spirulina algae is so high that more person use the sewage culture it Scientists study how to use kinds of wastewater culture of Spirulina algae.But this way need more process time, treatment efficiency is poor. So scientists want to improve the way. Building algal-bacterial symbiotic system is one way. Separating algal and bacterium in different system is another way. So I want to use the three way to treat of the same sewage to find which is best on the effect of sewage treatment, the process time, and the cost.algal-bacterial symbiotic system treat sewage. After 6 days running,COD removal rate is 76.9% TN removal rate is77.08%, TP removal rate is87.82%.The system included activated sludge and Spirulina algae is the best in three ways.