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Article: Changes in chemical properties during composting of spent pig litter at different moisture contents

TitleChanges in chemical properties during composting of spent pig litter at different moisture contents
Authors
Issue Date1998
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/agee
Citation
Agriculture, Ecosystems & Environment, 1998, v. 67 n. 1, p. 79-89 How to Cite?
AbstractAn ordinary pig pen employing the pig-on-litter system was set-up and 40 pigs were placed inside. After 12 weeks, the pigs were removed from the pen and the spent litter was collected and piled up in an open shed for further composting and maturation. Three piles of the spent litter were set up with moisture content adjusted to 50% (Pile A), 60% (Pile B) and 70% (Pile C). During further composting, the changes in temperature and chemical properties of the piles were monitored. Results of the study revealed that moisture content affected the changes in temperature and chemical properties (i.e., concentrations of NH+4-N, [NO−3 + NO−2]-N, C:N ratio, cation-exchange capacity [CEC], total and water extractable K and pH value) of the spent litter. Pile C, the pile adjusted to 70% moisture, had a delay in reaching peak temperature values and the temperature never dropped back to the ambient level. Piles A and B, the piles adjusted to 50 and 60% moisture content respectively, had very similar changes in temperature and chemical properties and had faster decomposition rates than pile C suggesting that moisture content between 50 and 60% is the suitable moisture content for an efficient further composting of spent litter. The maturation of spent litter was accompanied by changes, with periods of composting in pH, total C, ash, various forms of N, CEC and C:N ratio. Results of the regression analysis showed a curvilinear relationship between these chemical parameters with period of composting and temperature. Moreover, changes in these chemical parameters were found to be either positively or negatively correlated with temperature.
Persistent Identifierhttp://hdl.handle.net/10722/225570
ISSN
2015 Impact Factor: 3.564
2015 SCImago Journal Rankings: 1.879

 

DC FieldValueLanguage
dc.contributor.authorTiquia, SM-
dc.contributor.authorTam, NFY-
dc.contributor.authorHodgkiss, IJ-
dc.date.accessioned2016-05-20T02:06:30Z-
dc.date.available2016-05-20T02:06:30Z-
dc.date.issued1998-
dc.identifier.citationAgriculture, Ecosystems & Environment, 1998, v. 67 n. 1, p. 79-89-
dc.identifier.issn0167-8809-
dc.identifier.urihttp://hdl.handle.net/10722/225570-
dc.description.abstractAn ordinary pig pen employing the pig-on-litter system was set-up and 40 pigs were placed inside. After 12 weeks, the pigs were removed from the pen and the spent litter was collected and piled up in an open shed for further composting and maturation. Three piles of the spent litter were set up with moisture content adjusted to 50% (Pile A), 60% (Pile B) and 70% (Pile C). During further composting, the changes in temperature and chemical properties of the piles were monitored. Results of the study revealed that moisture content affected the changes in temperature and chemical properties (i.e., concentrations of NH+4-N, [NO−3 + NO−2]-N, C:N ratio, cation-exchange capacity [CEC], total and water extractable K and pH value) of the spent litter. Pile C, the pile adjusted to 70% moisture, had a delay in reaching peak temperature values and the temperature never dropped back to the ambient level. Piles A and B, the piles adjusted to 50 and 60% moisture content respectively, had very similar changes in temperature and chemical properties and had faster decomposition rates than pile C suggesting that moisture content between 50 and 60% is the suitable moisture content for an efficient further composting of spent litter. The maturation of spent litter was accompanied by changes, with periods of composting in pH, total C, ash, various forms of N, CEC and C:N ratio. Results of the regression analysis showed a curvilinear relationship between these chemical parameters with period of composting and temperature. Moreover, changes in these chemical parameters were found to be either positively or negatively correlated with temperature.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/agee-
dc.relation.ispartofAgriculture, Ecosystems & Environment-
dc.rightsPosting accepted manuscript (postprint): © <year>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/-
dc.titleChanges in chemical properties during composting of spent pig litter at different moisture contents-
dc.typeArticle-
dc.identifier.emailHodgkiss, IJ: hodgkiss@hkucc.hku.hk-
dc.identifier.doi10.1016/S0167-8809(97)00132-1-
dc.identifier.hkuros31574-
dc.identifier.volume67-
dc.identifier.issue1-
dc.identifier.spage79-
dc.identifier.epage89-
dc.publisher.placeNetherlands-

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