Study On Ammonia Nitrogen And Phosphorus Removal Of Livestock Waste Water By MAP/Ultrasound Wave

Animal husbandry has become China’s rural economic development of the mostactive growth point and main pillar industry，as a national modern animal husbandrydemonstration area of chongqing，with the development of economy,a large number ofemissions livestock and poultry waste causing serious pollution to the environment，Livestock and poultry waste water pollutants in China is further intensified the shortageof water resources of conflict，Severely restricts the implementation of the sustainabledevelopment strategy.At present,the echnologies to remove ammonia nitrogen andphosphorus have someshortcomings such as efficiency existing low,complex processand operational difficulties.Based on the research findings at home and abroad,,thepaper Explore MAP sedimentation method-ultrasonic technology combination processeof livestock and poultry waste water, to determine the system denitrification andphosphorus effect and the process parameters This paper using a separate MAPprecipitation, separate ultrasonic to treated livestock and poultry wastewater.Throughcomparing the contrast s ammonia nitrogen and phosphorus removal effect under thedifferent conditions of pH value, proportion of Ion moore and reaction time in theMAP precipitation reaction, different ultrasonic power. the results showed that theeffluent ammonia nitrogen and phosphorus removal rate reached95.1%and97.4%,respectively under the best conditions of pH9.5, n(Mg²⁺):n（NH₄⁺）:n(PO₄^3-)equalto1:1:1.2within10min. The best of the power of ultrasonic is60W, the effluentammonia nitrogen removal rate is43.2%In order to obtain better denitrification and phosphorus effect,in the optimumreaction conditions, jointing the MAP-ultrasonic, ultrasonic-aeration,MAP-ultrasonic-aeration process to treat the livestock and poultry waste water.Theresults show that the MAP-ultrasonic effect of treatment is better than effect oftreatment is better separate MAP,the ultrasonic-aeration effect of treatment is betterthan separate ultrasonic. There is synergy between the ultrasonic and aeration,anddenitrification effect as grow as the oxygen increases.when the oxygen respectively is50L/h、100L/h、150L/h、200L/h, six hours later, the effluent ammonia nitrogenremoval rate is55.20%，57.85%，60.25å’Œ61.18%.Join the oxygen in the MAP-ultrasonic, the effluent ammonia nitrogen removal isobviously Increased than before,under the best condition of MAP reaction,with ultrasonic power60W, oxygen is200L/h, Irradiation6hours can get the bestdenitrification effect, removal rate can reach98.6%.At the same time to adapt to the characteristics of the small farms for treatinglivestock and poultry waste wate, use the method of zeolite adsorption and MAPprecipitation-zeolite adsorption,which can get the Objective than eliminating thenitrogen and phosphorus at the same time.The single zeolite adsorption70min, theeffluent ammonia nitrogen and phosphorus removal rate reached67.6%and18.2%.under the best condition of MAP reaction,with zeolite adsorption50min, the effluentammonia nitrogen and phosphorus removal rate reached97.2%and above99%.Using The MAP precipitation-ultrasonic process and MAP precipitation-zeoliteadsorption to tread livestock and poultry wastewater can effectively reduce theammonia nitrogen and phosphorus concentration.they will have more extensivedevelopment space.