The Research On The Water-lifting Aeration In The Treatment Of Heihe Reservoir Source Water

At present, most domestic resoure water has been polluted,the technology of resoure water quality onsite process are getting more and more attention by people, and gradually become effective method of urban drinking water quality improvement. Water-lifting aerator is a new techonology of water quality onsite process,it is an economic and flexible techonology. For some reservior that seasonal change is big and has serious endogenous pollution is a better way to improve the water quality.Aiming at the problem of endogenous pollutions of heihe reservoir, the paper systematically studies the effect of water-lifting aerator in improving the water quality of Heihe reservior. It Mainly includes two aspects of content: (1) Analysis of water quality and reason of pollution of Heihe reservior;(2) Result of treatment of Heihe reservior by water-lifting aerator.This paper adopts the method of reservoir field monitoring and laboratory analysis, analyzed the water quality characteristics and effect of water-lifting aerator in improving the water quality of Heihe reservior,and get the Following conclusions:(1)Because water-lifting aeration mix and recruit affect,the trend of substrate water DO fall is hold back. Dissolved oxygen of mud surface is increased by1.7～2.4mg/L,and it produces much effect in increasing DO.(2)The technology of lifting water and aeration can mix water,the difference of tempeature between surface and substrate is dereased by 1.4~3.3℃compared to corresponding period of 2008, So the water lifting and aeration produce some effect in mixing the water. (3)The water-lifting aeration circulate hold release of mud NH3-N,TP,organic pollutants,compared to corresponding period of 2008,NH3-N,TP,organic pollutants near the mud is decreased by 75.6%,58.8%,49.7%, and the internal pollution is relieved;The algae in water surface is controlled by the technology of lifting water and aeration,and the Chlorophylls-a in water surface is decreased by 76.5%。(4)The water quality in the outlet of Heihe reservior is improved during the run of water-lifting aerator, and the TP,NH3-N,CODMn,Chlorophylls-a in the outlet of Heihe reservior is decreased by 41.4%,66.9%,17.6% and 53.2% compared to corresponding period of 2008.The experimental results indicate:the water-lifting aeration have marked effect in improving water quality of Heihe reservior,and it is effective and viable in improving the water quality of reservoir with great depth.