Title

First-order kinetic gas generation model parameters for wet landfills

Authors

Authors

A. A. Faour; D. R. Reinhart;H. X. You

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Waste Manage.

Keywords

Engineering, Environmental; Environmental Sciences

Abstract

Landfill gas collection data from wet landfill cells were analyzed and first-order gas generation model parameters were estimated for the US EPA landfill gas emissions model (LandGEM). Parameters were determined through statistical comparison of predicted and actual gas collection. The US EPA LandGEM model appeared to fit the data well, provided it is preceded by a lag phase, which on average was 1.5 years. The first-order reaction rate constant, k, and the methane generation potential, Lo, were estimated for a set of landfills with short-term waste placement and long-term gas collection data. Mean and 95% confidence parameter estimates for these data sets were found using mixed-effects model regression followed by bootstrap analysis. The mean values for the specific methane volume produced during the lag phase (V,,,,), Lo, and k were 33 m(3)/Megagrams (Mg), 76 m(3)/Mg, and 0.28 year(-1), respectively. Parameters were also estimated for three full scale wet landfills where waste was placed over many years. The k and L. estimated for these landfills were 0.21 year(-1), 115 m(3)/Mg, 0.11 year 1, 95 m(3)/M g, and 0.12 year(-1) and 87 m(3)/Mg, respectively. A group of data points from wet landfills cells with short-term data were also analyzed. A conservative set of parameter estimates was suggested based on the upper 95% confidence interval parameters as a k of 0.3 year(-1) and a L. of 100 m(3)/Mg if design is optimized and the lag is minimized. (c) 2006 Elsevier Ltd. All rights reserved.

Journal Title

Waste Management

Volume

27

Issue/Number

7

Publication Date

1-1-2007

Document Type

Article

Language

English

First Page

946

Last Page

953

WOS Identifier

WOS:000246880900010

ISSN

0956-053X

Share

COinS