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Environ Sci Pollut Res Int

Title:		"Relationships between stability, maturity, water-extractable organic matter of municipal sewage sludge composts and soil functionality"
Author(s):		Sciubba L; Cavani L; Grigatti M; Ciavatta C; Marzadori C;
Address:		"Department of Agricultural Sciences, Alma Mater Studiorum - University of Bologna, Bologna, Italy, luigi.sciubba@unibo.it"
Journal Title:		Environ Sci Pollut Res Int
Year:		2015
Volume:		20150505
Issue:		17
Page Number:		13393 - 13403
DOI:		10.1007/s11356-015-4611-7
ISSN/ISBN:		1614-7499 (Electronic) 0944-1344 (Linking)
Abstract:		"Compost capability of restoring or enhancing soil quality depends on several parameters, such as soil characteristics, compost carbon, nitrogen and other nutrient content, heavy metal occurrence, stability and maturity. This study investigated the possibility of relating compost stability and maturity to water-extractable organic matter (WEOM) properties and amendment effect on soil quality. Three composts from municipal sewage sludge and rice husk (AN, from anaerobic wastewater treatment plants; AE, from aerobic ones; MIX, from both anaerobic and aerobic ones) have been analysed and compared to a traditional green waste compost (GM, from green manure, solid waste and urban sewage sludge). To this aim, WEOMs were characterized through chemical analysis; furthermore, compost stability was evaluated through oxygen uptake rate calculation and maturity was estimated through germination index determination, whereas compost impact on soil fertility was studied, in a lab-scale experiment, through indicators as inorganic nitrogen release, soil microbial biomass carbon, basal respiration rate and fluorescein di-acetate hydrolysis. The obtained results indicated that WEOM characterization could be useful to investigate compost stability (which is related to protein and phenol concentrations) and maturity (related to nitrate/ammonium ratio and degree of aromaticity) and then compost impact on soil functionality. Indeed, compost stability resulted inversely related to soil microbial biomass, basal respiration rate and fluorescein di-acetate hydrolysis when the products were applied to the soil"
Keywords:		Biological Oxygen Demand Analysis Carbon/analysis Germination/drug effects Lepidium sativum/drug effects/growth & development Manure/analysis Nitrogen/analysis Sewage/*chemistry Soil/*chemistry Soil Microbiology Solid Waste/analysis Solubility Solvents/ch;
Notes:		"MedlineSciubba, Luigi Cavani, Luciano Grigatti, Marco Ciavatta, Claudio Marzadori, Claudio eng Germany 2015/05/06 Environ Sci Pollut Res Int. 2015 Sep; 22(17):13393-403. doi: 10.1007/s11356-015-4611-7. Epub 2015 May 5"