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Evaluation of extracted organic carbon and microbial biomass as stability parameters in ligno-cellulosic waste composts.
J Environ Qual. 2006 Nov-Dec; 35(6):2313-20.JE

Abstract

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 (B(C)) was determined as an indicator of the degree of biochemical transformation, whereas ninhydrin reactive N (B(NIN)) was measured to obtain the stability parameter B(NIN)/N(TOT) (N(TOT), 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 B(NIN)/N(TOT) 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.

Authors+Show Affiliations

CRA-Instituto Sperimentale per la Nutrizione delle Piante, sezione di Gorizia, Via Trieste 23, I-34170 Gorizia, Italy. claudio.mondini@entecra.itNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Evaluation Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17071902

Citation

Mondini, Claudio, et al. "Evaluation of Extracted Organic Carbon and Microbial Biomass as Stability Parameters in Ligno-cellulosic Waste Composts." Journal of Environmental Quality, vol. 35, no. 6, 2006, pp. 2313-20.
Mondini C, Sánchez-Monedero MA, Sinicco T, et al. Evaluation of extracted organic carbon and microbial biomass as stability parameters in ligno-cellulosic waste composts. J Environ Qual. 2006;35(6):2313-20.
Mondini, C., Sánchez-Monedero, M. A., Sinicco, T., & Leita, L. (2006). Evaluation of extracted organic carbon and microbial biomass as stability parameters in ligno-cellulosic waste composts. Journal of Environmental Quality, 35(6), 2313-20.
Mondini C, et al. Evaluation of Extracted Organic Carbon and Microbial Biomass as Stability Parameters in Ligno-cellulosic Waste Composts. J Environ Qual. 2006 Nov-Dec;35(6):2313-20. PubMed PMID: 17071902.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluation of extracted organic carbon and microbial biomass as stability parameters in ligno-cellulosic waste composts. AU - Mondini,Claudio, AU - Sánchez-Monedero,Miguel A, AU - Sinicco,Tania, AU - Leita,Liviana, Y1 - 2006/10/27/ PY - 2006/10/31/pubmed PY - 2007/1/4/medline PY - 2006/10/31/entrez SP - 2313 EP - 20 JF - Journal of environmental quality JO - J. Environ. Qual. VL - 35 IS - 6 N2 - 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 (B(C)) was determined as an indicator of the degree of biochemical transformation, whereas ninhydrin reactive N (B(NIN)) was measured to obtain the stability parameter B(NIN)/N(TOT) (N(TOT), 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 B(NIN)/N(TOT) 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. SN - 0047-2425 UR - https://www.unboundmedicine.com/medline/citation/17071902/Evaluation_of_extracted_organic_carbon_and_microbial_biomass_as_stability_parameters_in_ligno_cellulosic_waste_composts_ L2 - http://dl.sciencesocieties.org/publications/jeq/articles/35/6/2313 DB - PRIME DP - Unbound Medicine ER -