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Advisor(s)
Abstract(s)
Mechanical slurry separation is a useful technology for slurry management on farms. The
characteristics of the fractions obtained depend on the separation efficiency and on the
characteristics of the original slurry. In the present work, three types of slurry e pig, cow
and duck e were separated into 4 particle size fractions. The proportion, composition in
terms of carbon and nutrients as nitrogen (N) phosphorus (P) and potassium (K) was
evaluated. The potential of N mineralisation of whole slurries, and each fraction after soil
application, was assessed. Results of the study showed that the characteristics of the slurry
fractions obtained depend strongly on the slurry type considered, namely on its dry matter
(DM) content. A positive value of PNM was observed with the 3 slurry types and 4 fractions
considered, indicating that no N immobilisation occurred. Nevertheless, results showed
that the value of PNM vary significantly (P < 0.05) with slurry types and slurry particle size
fractions.
Description
Research Paper
Keywords
animal slurry mechanical separation N mineralisation
Pedagogical Context
Citation
"Biosystems Engineering". ISSN 1537-5110. 106(2010) 333-337