alexa Test methods for assessing the biological stability of biodegradable waste.
Environmental Sciences

Environmental Sciences

Journal of Bioremediation & Biodegradation

Author(s): Cossu R, Raga R

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Abstract This paper presents some results of investigations for the characterization of waste excavated from closed landfills and of waste sampled during mechanical-biological pretreatment before disposal in landfill. The results reported are those obtained with the tests carried out for the assessment of the biological stability of the waste. Some of the considered tests, such as the ones for the determination of the respiration activity and the biogas production, are well known and have been applied for years; other tests, such as the ones for the determination of BOD5 and COD in leaching test eluate and of the black index, are among the tests considered by the international research community for possible utilization for the evaluation of waste biological stability. Good correlations were found for most of the results obtained, proving the reliability of the test methods used. In particular, the effectiveness of biodegradation during waste pretreatment processes can be easily monitored by measuring the respiration index and/or the BOD5 and COD in leaching test eluate; for the characterization of waste from landfills, the use of respiration index can be recommended. In both cases the COD in leaching test eluate may provide additional useful information especially in the case of low values for the respiration index. Moreover, the black index test may be considered with some limits that will be discussed, providing good results in a simple and cost effective way. This article was published in Waste Manag and referenced in Journal of Bioremediation & Biodegradation

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