Nutrient Salts Accelerate The Degradation Of Garbage And Leachate Experimental Study On Catalytic Oxidation

The degradation rate of municipal solid waste is directly related to the stabilization process of landfills and the occupation cycle of land,which is an important parameter in landfill disposal technology.In addition,the production of landfill leachate also increases.Because the landfill leachate has the characteristics of high concentration of refractory organic matter,complex composition,large amount of production,poor biodegradability and large toxicity.The treatment of landfill leachate is very difficult and it is difficult to meet the emission standard.Currently,there are many kinds of catalysts used in the treatment of refractory organic wastewater,but there are many problems with high cost and limited treatment effect.The effects of nutrient elements on the degradation rate of living waste were studied by adding different nutrient elements to anaerobic landfill.In addition,the influence factors of catalytic oxidation landfill leachate were studied.Three kinds of catalysts,including cuprous oxide,graphene oxide,copper oxide and graphene oxide,were produced.,The optimum catalyst was selected and the optimum reaction time was determined,and the catalyst was characterized and analyzed.In municipal solid waste degradation rate of the influence factors of experiment study,through to the anaerobic landfill waste adding different amount of adding potassium chloride,potassium dihydrogen phosphate,ammonium chloride,compound vitamin and other nutrient elements,study the effect of nutrition elements of domestic waste degradation rate.The experimental results show that these nutrients can accelerate the degradation rate of household waste,and the combination of potassium chloride and multivitamin is the best to improve the degradation rate of garbage.In the nutrients required by these microorganisms,the effect of adding 0.5mol/L potassium chloride+0.5mol/L multivitamin to the household waste is the best way to accelerate the degradation rate of living garbage.By adding 0.5mol/L of potassium chloride+0.5mol/L multivitamin,the waste layer was deposited 17.87 cm in 180 days,compared with the landfill site that did not add nutrients.Catalyst for catalytic oxidation of garbage leachate experiment results show that the cuprous oxide,graphene oxide,cuprous oxide and graphene composite oxide catalyst three kinds of catalysts in the treatment of waste leachate,cuprous oxide and graphene composite oxide catalyst for garbage leachate COD best removal rate.The effect of catalyst can be optimized by changing the amount of catalyst and reaction time.Through further study found that using the combined catalyst dosing quantity for catalyst quality/quality of leachate COD=0.7,when the reaction time of 1 h for the catalytic oxidation treatment of landfill leachate optimum reaction conditions.The removal rate of COD in landfill leachate can reach up to 93.33%in this reaction condition.Experiments on Cu₂O/graphene oxide compound catalytic oxidation treatment waste leachate BOD₅/COD can reach 0.84,the highest of wastewater treated by catalytic oxidation can be enhanced biological sex,subsequent processing can use biological method.This greatly saves the processing cost and has significant social and economic significance to reduce the disposal cost of landfill leachate.To deal with the best effect of Cu₂O/graphene composite oxide catalyst characterization analysis can be seen after Cu₂O and graphene oxide compound,its surface is rough,specific surface area increases,can be seen in the SEM figure has generated to crystal materials,can absorb more pollutants.The removal rate of pollutants is higher As can be seen from the EPMA representation diagram,the composition of the catalyst elements in the new synthesis is basically consistent with the composition of the elements before the composition,The high purity and no impurities were found in the composition analysis table of the copper-oxide composite catalyst.Therefore,the new compound has good catalytic performance.