Biodomes' Experimental Study Of Dealing With Polluted River Water

With the development of industrialization and urbanization,the pollution of rivers becomes more and more serious.As a low cost and high efficiency river treatment technology,aeration purification technology has been widely used in practice.Biodome,as a new kind of aeration device,has the advantages of anti impulsion load,good treatment effect and low cost,and it's treatment effect is influenced by aeration mode,aeration rate and depth.Biodome's intermittent aeration is very effective for sewage.Compared with continuous aeration,intermittent aeration's maximum material removal rate of chemical oxygen demand,total nitrogen and total phosphorus is respectively 25.01%,20.09% and1.28% higher,intermittent aeration can also save more electricity.Through the experiment of 400,600,800,600 and 1200 L/h five different aeration rates find that the larger the aeration rate the faster the better treatment effect and achieve stability,the larger groups of aeration rates' treatment effect are similar,and too little aeration rate's treatment effect is not good,comprehensive treatment effect and energy consumption,the best aeration rate is 800 L/h.On the condition of optimal operation,biodome's minimum value of maximum material removal rate of chemical oxygen demand,ammonia nitrogen,total nitrogen and total phosphorus are 25.59%,75.96%,7.41% and 14.27% higher than standing experimental group.It shows the superiority of biodome.Comparison of the treatment effects of different depth,the effects is similar,the influence of depth is not very obvious,basically presents the phenomenon of the deeper the better treatment effect.