Biodegradation Stability Of Organic Solid Waste
Characterized By Physico-chemical Parameters
Author(s)
N. Cobo, A. López & A. Lobo
Abstract
A generalized methodology to characterize the bio-chemical properties of waste
results is of great interest in waste management. The chemical and physical
methods traditionally used to determine the organic content of solids, such as
volatile solids content (VS), total organic carbon content (TOC), cellulose
(CEL), hemicellulose (HEM), lignin (LIG), and leaching tests with later analyses
of the eluate are easy to perform and to reproduce, but they do not give enough
information about the rate of waste stabilization. On account of this, more
specific assays like Biochemical Methane Potential (BMP) or respirometry
assays are nowadays being performed. These biodegradation assays are more
complex because they require extensive time and specific equipments and a
number of influencing parameters have to be considered. These difficulties
promoted the interest in looking for correlations between \“conventional”,
simpler analyses and biodegradation assays. Based on characterization results
obtained by different authors in old waste, ratios between BMP and several
parameters are studied in this paper, showing significant correlations in most
cases. As a theoretical analysis indicates, only for CEL and CEL+HEM laws that
can be generalized to other cases were obtained. VS and (CEL+HEM)/LIG are
indicators of the degradation state too, but only with regard to samples of the
same type of waste. Since VS content does not inform about organic matter
biodegradability and (CEL+HEM)/LIG is independent of the inorganic fraction
of waste, the laws BMP/VS and BMP/[(CEL+HEM)/LIG] obtained are different
for each studied data series.
Keywords: waste characterization, waste stability, analyses correlation,
biochemical methane potential (BMP), leaching tests, biodegradation.
Keywords
waste characterization, waste stability, analyses correlation,
biochemical methane potential (BMP), leaching tests, biodegradation.
Related Book
Other papers in this volume
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