New Bio-media Purification Of Micro-polluted Water

In recent years,because of the fast development of economy,sources water in the world have been widely polluted,the traditional water purification technique can not elim inate such contamination in the raw water.Therefore,the purification technique for the micro-polluted raw water has been an important and urgent research subject,the study of biological contact oxidation pretreatment technology has becoming the major with its ad vantages.This article researched different artificial media for the micro-polluted water.Firstly,the rapid draw-off sludge method is carried out for AquaMats,assembled me dium and elastic medium,then compare and analyze the biofilming rate,the removal rate s of pollutants,biomass and bioactivity of the three artificial media.Assembled medium and AquaMats are better on biofilming rate and also the optimal methods to improve the water quality.Secondly,by comparing the TN,NH₄⁺-N,COD_Mnand TP removal rates during A quaMats and assembled medium with same exterior condition,the outer-water of AquaMa ts is much better than assembled medium.Lastly,analysis the influence factors of AquaMats treatment on the micro-polluted w ater,the conclusion is:AquaMats has strong adaptability for different concentration water. In the low temperature,the removal rates of NH₄⁺-N and organics is stable;and the r emoval rates of organics and NH₄⁺-N will move up along with the water temperature's r ise,but comparing with the organics,the removal rates of NH₄⁺-N is more sensitive to water temperature.Under the condition of the p(NH₄⁺-N)and p(COD_Mn)of input-water were 2.5mg/L and 8mg/L,when the HRT rising from 2h to 4h,the water quality has b een greatly improved.But then HRT sustaining rising to 6h and 8h,the degradation of s ome targets are not obvious,the removal rates of COD_Mnand TOC will follow the incre ased of DO rise a little bit,but the removal rates of NH₄⁺-N and TN will change Obvio usly.For this test,the appropriate dissolved oxygen is 4.0 to 6.0 mg/L.Research shows that,using AquaMats pretreatment of the raw water-pollution can be achieved at least three class of surface water standards,a very good medium in the mi cro-polluted water purification treatment has broad application prospects.