Mathematical model for methane production from landfill bioreactor
The purpose of this discussion is to explain the experimental results of a landfill bioreactor (LFBR) from a microbiological perspective and to provide a feasible strategy to evaluate methane production performance, since suitable models and complicated and not sufficiently reliable for anaerobic-system design, as concluded by the authors. The discussers point out that the LFBR system with a leachate recycle significantly increased the overall residence time of reactants available for biodegradation. Thus, a higher conversion of organic carbon resulted compared with the system without leachate recycle. For the degradation of recalcitrant compounds, it is crucial to acquire relatively longer residence times in order to induce and synthesize essential enzymes in optimum amounts to transform pollutants to CH{sub 4}. Pirt (1975) mentioned that, as the age of the culture used to inoculate a bioreactor approached the time of late logarithmic phase, the lag time for the bioreactor reached a minimum. This suggests that the degradation rate of the LFBR system can be maximized by using an inoculum of optimum age. This further suggests that biomass age is a critical parameter in the performance of bioreactors. In addition, the discussers propose that certain observations in the authors' paper can be explained in terms of biomass age.
- Research Organization:
- Environmental Protection Agency, Cincinnati, OH (US)
- OSTI ID:
- 20015094
- Journal Information:
- Journal of Environmental Engineering (New York), Vol. 126, Issue 2; Other Information: PBD: Feb 2000; ISSN 0733-9372
- Country of Publication:
- United States
- Language:
- English
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