Experimental Research On Disposal Of Water Eutrophication Of Liyu Lake In Zhuzhou

Liyu Lake,which is located in Liyu Leisure Vally of Zhuzhou city,was eutrophicated because of the raw rain and sewage as its supplemental water source and its imperfect ecological structure and founction.The main pollution are nitrogen,ammonia nitrogen,total phosphorus,COD and BOD₅.Based on the summary of water eutrophication repair technology,the study on the characteristics of water eutrophication solves the problem with combination repair technology of aeration and chemical oxidation.Bleaching powder and monopersulfuric acid compound salt are respectively used as chemical oxidants.A comparative study of the effects of aeration combined with bleaching powder and potassium monopersulfate compound salt on the eutrophication of water bodies,It was concluded that the combined efficiency of aeration and potassium peroxymonosulfare composite salt chemical oxidization in the treatment of water eutrophication is greater than the combination of aeration and bleaching powder.Combined with the characteristics of aeration and single potassium persulfate compound salt remediation technology to deal with the eutrophication of water,the optimal operation parameters for the combination of aeration and potassium monopersulfate compound salt to repair the eutrophication of the water body were obtained.The test first performed aeration on 10 parts?30 L each?of the same volume of water sample.At the same time,aeration was applied to 10samples.The aeration volume was 20L/min,the reaction period was 24h?10min for each inlet and outlet water,12h for aeration,and the rest for standing time?.The concentration of stabilized DO was 6.6mg/L for 24d,and the water body The content of pollutants also showed an increase and then decrease with the increase of aeration time.Finally,the removal rates of turbidity,COD,BOD₅,NH₃-N,TP,blue-green algae and trihalomethane reached 54.44%and 57.14%,33.33%,13.22%,17.24,23.89%and 1.59%.Of the 10 water samples after aeration,5 of them were added to the bleaching powder,and the other 5 water samples were added to a single potassium bisulfate compound salt.,and the oxidation reaction was carried out for 75 minutes.The removal effects of two oxidants on the nutrient-rich water were examined and compared.The test results show that the concentration of DO in the water containing potassium monopersulfate composite salt is 12.64%higher than that in the bleached water;The single potassium bisulphate complex salt has higher removal rate of turbidity,COD,BOD₅,NH₃-N,TP and blue-green algae than water in the water.The turbidity,COD,BOD₅,and NH₃-N in the water between the two.The difference in removal rates of TP,TP and blue-green algae reached 8.89%,4.76%,8.73%,10.51%,17.24%and 16.57%;The addition of bleach to the water increases the amount of trihalomethanes.Only when the concentration of potassium monopersulfate exceeds 200 mg/L,a small amount of trihalomethane is added.The eutrophication of aeration and potassium monopersulfate compound salt chemical oxidation of chestnut rain lake treatment efficiency is greater than the aeration and bleaching powder and chemical oxidation combination,aeration and chemical oxidation of potassium monopersulfate compound salt combination will not have two pollution of water.Finally,according to the basic principle and influencing factors of the chemical oxidation of potassium monopersulfate compound salt,the aeration volume is 20L/min,the reaction period is 24h?10min for inlet and outlet water,12h for aeration,and the rest is standing time?,after running for 24d,adding potassium monopersulfate compound salt for chemical oxidation test.The aeration and potassium monopersulfate compound salt salt chemical oxidation by single factor test and orthogonal test in pH,potassium monopersulfate compound salt concentration,treatment time and temperature four factors influencing the removal rate of pollutants in order:pH>concentration of potassium monopersulfate compound salt>treatment time>temperature.To determine the aeration and potassium monopersulfate compound salt chemical oxidation treatment of chestnut rich nutritional pollution Yuhu operating parameters for the best:the temperature is 25,pH is 7,the concentration of salt is potassium monopersulfate compound 200mg/L,processing time is 90min.