2024-03-29T06:08:26Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/160412020-02-03T12:42:27Zcom_10261_72com_10261_6col_10261_325
2009-08-18T10:31:00Z
urn:hdl:10261/16041
Evaluation of extracted organic carbon and microbial biomass as stability parameters in ligno-cellulosic waste composts
Mondini, Claudio
Sánchez-Monedero, Miguel Ángel
Sinicco, T.
Leita, L.
Ministero delle Politiche Agricole Alimentari e Forestali
European Commission
Waste Management
Organic Carbon
Microbial Biomass
Technical Reports
Extracted organic C and microbial biomass were evaluated as stability parameters in 3 different ligno-cellulosic waste composts. Organic C was extracted by both water and alkali and further separated in humic-like carbon (HLC) and nonhumic carbon (NHC). Conventional humification parameters, such as humification index and degree of humification were calculated from NHC and HLC. Microbial biomass carbon (BC) was determined as an indicator of the degree of biochemical transformation, whereas ninhydrin reactive N (BNIN) was measured to obtain the stability parameter BNIN/NTOT (NTOT, total N). The water-extracted organic C did not provide reliable information on the transformations underwent by the ligno-cellulosic wastes during composting, since its content remained almost unaltered during the whole process. In contrast, parameters based on the alkali-extracted organic C and microbial biomass clearly reflected organic matter (OM) changes during the process. There was an increase in the net amount of HLC in the alkali extracts throughout composting, especially in the first 7 to 12 wk of the process, as well as a relative enrichment of HLC with respect to NHC. Values of humification index and degree of humification in end products were consistent with an adequate level of compost stability. The stability parameter BNIN/NTOT showed to be a reliable indicator of stability in ligno-cellulosic wastes. Parameters based on the alkali-extracted C and microbial biomass clearly reflected the transformation of the OM during composting and can be used as stability parameters in ligno-cellulosic waste composts.
2009-08-18T10:31:00Z
2009-08-18T10:31:00Z
2006-10-27
artículo
Journal of Environmental Quality 35: 2313-2320 (2006)
0047-2425
http://hdl.handle.net/10261/16041
10.2134/jeq2006.0055
http://dx.doi.org/10.13039/501100005401
http://dx.doi.org/10.13039/501100000780
eng
http://dx.doi.org/10.2134/jeq2006.0055
closedAccess
American Society of Agronomy