| Title |
Developments of Greenhouse Gas Generation Models and Estimation Method of Their Parameters for Solid Waste Landfills |
| Authors |
박진규(Park, Jin-Kyu) ; 강정희(Kang, Jeong-Hee) ; 반종기(Ban, Jong-Ki) ; 이남훈(Lee, Nam-Hoon) |
| DOI |
https://doi.org/10.12652/Ksce.2012.32.6B.399 |
| Keywords |
폐기물매립지;온실가스 발생량 예측모델;메탄잠재발생량;메탄발생속도상수 Solid waste landfill;Greenhouse gas generation model;Methane generation potential;Methane generation rate constant |
| Abstract |
The objective of this research is to develop greenhouse gas generation models and estimation method of their parameters for solid waste landfills. Two models obtained by differentiating the Modified Gompertz and Logistic models were employed to evaluate two parameters of a first-order decay model, methane generation potential ($L_0$) and methane generation rate constant (k). The parameters were determined by the statistical comparison of predicted gas generation rate data using the two models and actual landfill gas collection data. The values of r-square obtained from regression analysis between two data showed that one model by differentiating the Modified Gompetz was 0.92 and the other model by differentiating the Logistic was 0.94. From this result, the estimation methods showed that $L_0$ and k values can be determined by regression analysis if landfill gas collection data are available. Also, new models based on two models obtained by differentiating the Modified Gompertz and Logistic models were developed to predict greenhouse gas generation from solid waste landfills that actual landfill generation data could not be available. They showed better prediction than LandGEM model. Frequency distribution of the ratio of Qcs (LFG collection system) to Q (prediction value) was used to evaluate the accuracy of the models. The new models showed higher accuracy than LandGEM model. Thus, it is concluded that the models developed in this research are suitable for the prediction of greenhouse gas generation from solid waste landfills. |