Techniques for the evaluation of maturity for composts of industrially contaminated lake sediments

Composting was applied as a bioremediation methodology for the reclamation of dredged sediments of Isnapur, Khazipally and Gandigudem lakes polluted with industrial wastes. The present study is an attempt to elaborate upon organic matter transformations and define the parameters for product maturity...

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Bibliographic Details
Published in:Waste management (Elmsford) 2008, Vol.28 (10), p.1773-1784
Main Authors: Aparna, C., Saritha, P., Himabindu, V., Anjaneyulu, Y.
Format: Article
Language:English
Subjects:
Applied sciences
Benzopyrans - analysis
Biodegradation, Environmental
Carbon - analysis
Carbon Dioxide - metabolism
Catechol Oxidase - metabolism
Continental surface waters
Exact sciences and technology
Fresh Water - analysis
Freshwater
Geologic Sediments - analysis
Germination
Humic Substances - analysis
India
Industrial Waste - analysis
Manure
Natural water pollution
Nitrates - analysis
Other industrial wastes. Sewage sludge
Other wastes and particular components of wastes
Oxidoreductases - metabolism
Pollution
Quaternary Ammonium Compounds - analysis
Seeds - growth & development
Soil - analysis
Soil Pollutants - analysis
Spectrophotometry, Infrared
Spectroscopy, Fourier Transform Infrared
Wastes
Water treatment and pollution
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Summary:Composting was applied as a bioremediation methodology for the reclamation of dredged sediments of Isnapur, Khazipally and Gandigudem lakes polluted with industrial wastes. The present study is an attempt to elaborate upon organic matter transformations and define the parameters for product maturity adapting chemical and spectroscopic methods during composting. The stability and maturity of sediments were evaluated by assessing parameters like C/N ratio, nitrification index (NH4-N/NO3-N), water-soluble organic carbon concentration, CO2 evolution rate, cation exchange capacity and indices such as humification index, E4/E6 ratio, compost mineralization index (ash content/oxidizable carbon), germination index, dehydrogenase, polyphenoloxidase activities and FTIR spectroscopy. The results showed that the changes in the above chemical and biological parameters can be employed as reliable indicators of stability and maturity. The FTIR spectra revealed enrichment in the aromatic groups and a degradation of the aliphatic groups indicating stabilization of the final compost.
ISSN:0956-053X
1879-2456
DOI:10.1016/j.wasman.2007.07.008