Testing anaerobic biodegradability of polymers in a laboratory-scale simulated landfill

Article Abstract:

A laboratory scale system that closely simulates decomposition in landfills was developed to measure anaerobic biodegradability of a C-labeled test polymer under conditions representing the refuse matrix. The system was found to be useful for biodegradation measurement, where the biodegradability of a citric acid cross-linked cellulose, a newly developed material, can be compared with that of pure cellulose and greater than that of a lignified cellulose. These forms of cellulose are usually buried in landfills.

Research and Development in the Physical, Engineering, and Life Sciences, Air Pollution Control R&D, Air pollution, Air pollution research, Pollution control research

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Changes in the enantiometric ratio of (R)- to (S)-mecoprop indicate in situ biodegradation of this chiral herbicide in a polluted aquifer

Article Abstract:

Enantioselective microbial degradation enhances the enantiomeric ratio of (R)- to (S)-mecoprop during landfill leachate's passage in groundwater. Leachate samples taken from a waste disposal site in Switzerland revealed equal concentrations of (R)- and (S)-mecoprop. Such concentrations suggest that in the receiving groundwater, a racemix mixture of mecoprop leached. On the other hand, groundwater samples downstream of the landfill revealed a marked excess of (R)-mecoprop.

Pesticide and Other Agricultural Chemical Manufacturing, Agricultural chemicals, not elsewhere classified, Herbicides, Chirality, Enantiomers

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Biodegradability of municipal solid waste components in laboratory-scale landfills

Article Abstract:

Methane yields, cellulose and hemicellulose decomposition and leachate toxicity were measured to characterize the major biodegradable components of municipal refuse. A general trend observed was that methane yield increased as the cellulose and hemicellulose content increased. The degree of lignification of a component was likewise not a good predictor of biodegradation. Except for food waste, leachate from the decomposition of refuse components was not toxic.

Analysis, Refuse and refuse disposal, Waste disposal

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