Experiment Research On Treatment Of Municipal Landfill Leachate With Fenton Method And Strengthening Sbr Techonology

Municipal refuse in the landfill process will produce large amounts of leachate.It is akind of typical high pollution, high concentration and high toxicity and refractory organicwastewater, it is easy to cause secondary pollution to the environment. Therefore, thetreatment of landfill leachate has become urgent.It take Jiang Cun Gou ditch early garbage landfill leachate as the research object in xi ’an, using Fenton method+strengthening SBR combined technology to deal with it. Fentonprocess as pretreatment, will remove a part of pollutants at the same time.Leachate can bebiochemical after Fenton process, subsequent processing using SBR technology, furtherreduce the pollutant concentration.Though experiments and single factor analysis experiment, concluded Fenton methodtreatment of landfill leachate optimal condition is: the reaction time for60min, initial pHvalue of4, Fe2+dosage of0.04mol/L,30%H2O2dosage of5ml/100ml of leachate. Underthe optimum reaction conditions, Fenton process for the average removal rate of COD andNH3-N is69.04%and12.38%respectively.Fenton process on the CODCrremoval issignificant, but NH3-N removal effect is not good. Using Fenton treatment of garbage leachatecan remove refractory organics, or macromolecular substance decomposed into smallmolecules, reduce subsequent biological processing load and processing costs, so that it isconducive to the follow-up biological degradation, waste leachate effluent water qualityfurther improved.After using SBR reactor for processing.Experimental studies to determine the operationmode of the SBR reactor as the A/O, aerobic aeration first8h, anaerobic stir3h again, thisoperation mode will help system for ammonia nitrogen removal. Also examines the differentdissolved oxygen concentration and initial pH value of SBR reactor, the effects ofconcentration of dissolved oxygen for3-4mg/L, initial pH value of7.5or so, the SBR reactoron the removal rate of CODCrand NH3-N is69.3%and76.7%respectively.The thesis to the SBR reactor adding the enhancer treatment effect is studied. Bystudying different dosing intervals (aeration section, oxygen mixing and static sedimentation) influence on pollutant removal efficiency, determine the aeration period of adding theactivated carbon or diatomite processing effect is better. Compared with the blank SBRprocess, the activated carbon-SBR process on the removal rate of CODCrand NH3-N were9.41%and14.31%, diatomite-SBR removal rate of CODCrand NH3-N were increased by6.43%,and9.24%,And determination of the heavy metals Cr, Ni, Cu, Cd, Zn, and removal ofHg effects, have been strengthened.Nitration reaction within the reactor kinetics studies show that activated carbon-SBRprocess, the diatomite-SBR process and improved SBR saturation constant ks, respectively is:18.01,16.22and14.26, vmaxis0.0036,0.0033and0.0029, respectively. Shows that, under thesame condition, the same amount of ammonia nitrogen removal, activated carbon-SBRprocess and diatomite-SBR process than strengthening SBR process required shorter reactiontime, or in the same reaction time to remove ammonia nitrogen is more, from the Angle ofreaction kinetics shows that adding the powder activated carbon and diatomite can improvethe removal efficiency of biological treatment system of ammonia nitrogen.Technology and economic and technical analysis shows that,using powder active carbonand diatomite leachate strengthening SBR technique is technically feasible, and can obtainbetter treatment effect, by comparing the draw on economy, technology is feasible.