Production Process of Nitrous oxide and Countermeasure in Landfill Site

recently,incineration is becoming a main intermediate waste processing method due to high waste reductionefficiency in volume and weight in Japan. Therefore，the amount of incineration residue is increasing in landfill and the quality of landfilled wastechanged to inorganic material. Consequently，the generation amount of methane and carbon dioxide form the landfill decreased. But the nitrogencompounds such as ammonium and nitrate still remain，它是可能的生产nitrous oxidewhich has times as high in the greenhouse effect as methane on nitrification anddenitrification process. So，我们已经在实验中使用了landfill modeled lysimeters和the shaking tests to clarifythe production process of nitrous oxide and to find out a countermeasure against the production ofnitrous oxide in landfill mainly disposed or the incineration residue. the results of this研究are summarized as follows；1) In landfill mainly disposed of the incineration resi…more due,nitrous oxide is produced on the biological oxidation of ammonium (nitrification) and theNitrification take place by nitrifyer and chemical reduction by,2) Nitrification take place by nitrifyer and chemical reduction bycatalysis of metal such as ferrous and cuprous compounds incineration3) Production activity of nitrous oxide on anaerobic condition is higher than onaerobic.,4) Ratio of nitrous oxide production to the nitrogen decrease amount is 0.38% inincineration residue only and 0.10% incombustibles on chemical reduction and 0.33% on biologicalnitrification.,5) Production rate of nitrous oxide是higher in the landfill only disposed of theincineration residue than that the mixture of incineration residue and incombustibles. 6) This isdue to the decline of chemical reduction activity by the oxidation activity which incombustibles mayhave.,7)它估计的generation amount of nitrous oxide from landfill是5.42 - 8.92t-N D2O/year.,8) Countermeasures against nitrous oxide production are to be more aerobic inlandfill layer and to avoid the disposing of incineration residue only. Less

Recently, an incineration is becoming a main intermediate waste processing method due to high waste reduction efficiency in volume and weight in Japan. Therefore, the amount of incineration residue is increasing in landfill and the quality of landfilled waste changed to inorganic material. Consequently, the generation amount of methane and carbon dioxide form the landfill decreased. But the nitrogen compounds such as ammonium and nitrate still remain and it is possible to produce the nitrous oxide which has five times as high in the greenhouse effect as methane on nitrification and denitrification process. So, we carried out the experiment using the landfill modeled lysimeters and the shaking tests to clarify the production process of nitrous oxide and to find out a countermeasure against the production of nitrous oxide in landfill mainly disposed or the incineration residue. The results of this research are summarized as follows ;1) In landfill mainly disposed of the incineration resi … More due, the nitrous oxide is produced on the biological oxidation of ammonium (nitrification) and the chemical reduction of nitrate.,2) Nitrification take place by nitrifyer and chemical reduction by the catalysis of metal such as ferrous and cuprous compounds including in the incineration residue.,3) Production activity of nitrous oxide on anaerobic condition is higher than on aerobic.,4) Ratio of nitrous oxide production to the nitrogen decrease amount is 0.38% in incineration residue only and 0.10% incombustibles on chemical reduction and 0.33% on biological nitrification.,5) Production rate of nitrous oxide is higher in the landfill only disposed of the incineration residue than that the mixture of incineration residue and incombustibles.,6) This is due to the decline of chemical reduction activity by the oxidation activity which incombustibles may have.,7) It was estimated that the generation amount of nitrous oxide from landfill is 5.42〜8.92 t-NィイD22ィエD2O/year.,8) Countermeasures against nitrous oxide production are to be more aerobic in landfill layer and to avoid the disposing of incineration residue only. Less