Study On Treatment Of Tail Water Of Piggery Wastewater Biochemical System By Three-dimensional Electrode Method

The tail water from piggery which is trated by the anaerobic and aerobic process.It will definitely pollute water if it doesn't meet the standard,so it will affect people's lives and threat human health.At present,our government require sewage treatment plants which are not meet the standard to carry out the standardization.The effluent quality of most piggery wastewater sewage treatment systems does not meet the relevant national emission standards.Moreover,the traditional methods of treating such wastewater hold the disadvantages of large area,serious secondary pollution and high cost.In this article a modified three-dimensional electrode method is used to treat such wastewater.Then find it is more efficient,lower processing cost and more mild than the traditional ways.And the water quality meets national and local standards.This study is based on the biochemical tail water of apiggery integrated sewage treatment equipment in Nanchang County,Jiangxi Province.Firstly,building a three-dimensional electrode experiment device to explore the best electrode plate combination,optimal electrolyte,optimal filler electrode,then combining single factor experiment with response surface experiment and exploring the effects of voltage,plate spacing and electrolyte concentration on electrolysis efficiency and the best electrolysis parameters then analyzing the energy consumption of the device from current density and Faraday electrolysis efficiency.In the end,useing the methods of Scanning Electron Microscope,X-Ray Diffractometer to haracterize the filler.It explore the mechanism of electrolysis in the base of all of these.It find that the best electrode plate combination is C?+?,C?-?;the best electrolyte is NaCl.The three-dimensional electrode system has higher electrolysis efficiency when the voltage is 8.00-12.00V,the electrolyte concentration is 0.15-0.25mol/L,the plate spacing is 4.00-8.00cm,and the initial pH is 5.0.The R² of the established response surface model Y₁?COD removal rate?was 0.9827,and the R² of the model Y₂?ammonia nitrogen removal rate?was 0.9812.The order of influence of various factors on COD_cr removal is voltage>electrolyte concentration>plate spacing;the order of influence of ammonia nitrogen removal rate is electrolyte concentration>voltage>plate spacing.The best reaction parameters are voltage 10.50V,plate spacing 6.25cm,electrolyte concentration 0.20mol/L,initial pH 5.0.It find that the final effluent COD_cr concentration was 144.00 mg/L,and the removal rate reached 70.40%;the effluent ammonia nitrogen concentration was 38.20mg/L,and the removal rate reached 74.50%under the optimal parameters.It is superior to the emission standard in the high-efficiency intensive development zone in the?Wastewater discharge standard of Poyang Lake eco-economic district in Jiangxi Province??DB36/852-2015?.The current density of the three-dimensional electrode system is 112.94 A/m² and the Faraday current efficiency is 443.90%under optimal electrolysis conditions,which illustrated the device not only holds high efficiency but also loss less electric current.Activated carbon was loaded?-MnO₂?PDF#21-0547?;?-MnO₂?PDF#32-0637?;Mn₃O₄?PDF#33-0887?which was found by X-Ray Diffractometer.It is completely analyzing the reaction mechanism of three-dimensional electrode degradation of biochemical tail water in piggery sewage system from Direct oxidation and indirect oxidation combined with characterization experiment.This study is aimed at designing a set of high-efficiency,low-energy three-dimensional electrode equipment to treat the biochemical tail water from piggery sewage system.It has application value for the upgrading of sewage treatment plants.