Effects of straw, sawdust and sand bedding on dairy manure composting

Frederick C. Michel, Harold M. Keener, Jerome Rigot, Tom Wilkinson, John Pecchia

Research output: Contribution to conferencePaper

3 Citations (Scopus)

Abstract

Composting is an increasingly popular manure management tool for dairies. However, there is little information on the effects of common amendment and bedding types (straw, sawdust and sand) on windrow size, mass, volume, dry matter, and nitrogen losses during composting. In this study, straw, sawdust and sand bedded dairy manures were amended with either sawdust or straw and composted on multiple occasions. Results showed that starting windrow volumes for straw amended composts were 2.1 to 2.6 times greater than for sawdust windrows. Straw amended composts had lower initial bulk densities and temperatures, higher free air space values (75-93%), and near ambient interstitial oxygen concentrations during composting as compared to sawdust amended composts. Sand bedding resulted in greater compost densities, less weight loss and >50% more final compost on a per cow basis. All sawdust-amended composts self-heated to >55°C within 10 days. Sawdust composts without sand maintained these levels for more than 60 days meeting pathogen reduction guidelines. However, none of the straw-amended or sand bedded sawdust amended composts met the guidelines. All of the composts were stable after 100 days and exhibited manure volume and weight reductions relative to the initial manure. Initial compost C:N ratios ranged from 25:1 to 50:1 and the manure nitrogen lost during composting ranged from 2% to 38%. There was a negative correlation between initial compost C:N ratio and nitrogen loss (R 2=0.59). An initial C:N ratio of greater than 40 resulted in nitrogen losses less than 10% during dairy manure composting with all three bedding types.

Original languageEnglish (US)
Pages4669-4682
Number of pages14
StatePublished - Dec 1 2004
EventASAE Annual International Meeting 2004 - Ottawa, ON, Canada
Duration: Aug 1 2004Aug 4 2004

Other

OtherASAE Annual International Meeting 2004
CountryCanada
CityOttawa, ON
Period8/1/048/4/04

Fingerprint

Sawdust
Composting
Dairies
Manures
Straw
Sand
Nitrogen
Pathogens
Oxygen
Air

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Michel, F. C., Keener, H. M., Rigot, J., Wilkinson, T., & Pecchia, J. (2004). Effects of straw, sawdust and sand bedding on dairy manure composting. 4669-4682. Paper presented at ASAE Annual International Meeting 2004, Ottawa, ON, Canada.
Michel, Frederick C. ; Keener, Harold M. ; Rigot, Jerome ; Wilkinson, Tom ; Pecchia, John. / Effects of straw, sawdust and sand bedding on dairy manure composting. Paper presented at ASAE Annual International Meeting 2004, Ottawa, ON, Canada.14 p.
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abstract = "Composting is an increasingly popular manure management tool for dairies. However, there is little information on the effects of common amendment and bedding types (straw, sawdust and sand) on windrow size, mass, volume, dry matter, and nitrogen losses during composting. In this study, straw, sawdust and sand bedded dairy manures were amended with either sawdust or straw and composted on multiple occasions. Results showed that starting windrow volumes for straw amended composts were 2.1 to 2.6 times greater than for sawdust windrows. Straw amended composts had lower initial bulk densities and temperatures, higher free air space values (75-93{\%}), and near ambient interstitial oxygen concentrations during composting as compared to sawdust amended composts. Sand bedding resulted in greater compost densities, less weight loss and >50{\%} more final compost on a per cow basis. All sawdust-amended composts self-heated to >55°C within 10 days. Sawdust composts without sand maintained these levels for more than 60 days meeting pathogen reduction guidelines. However, none of the straw-amended or sand bedded sawdust amended composts met the guidelines. All of the composts were stable after 100 days and exhibited manure volume and weight reductions relative to the initial manure. Initial compost C:N ratios ranged from 25:1 to 50:1 and the manure nitrogen lost during composting ranged from 2{\%} to 38{\%}. There was a negative correlation between initial compost C:N ratio and nitrogen loss (R 2=0.59). An initial C:N ratio of greater than 40 resulted in nitrogen losses less than 10{\%} during dairy manure composting with all three bedding types.",
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Michel, FC, Keener, HM, Rigot, J, Wilkinson, T & Pecchia, J 2004, 'Effects of straw, sawdust and sand bedding on dairy manure composting', Paper presented at ASAE Annual International Meeting 2004, Ottawa, ON, Canada, 8/1/04 - 8/4/04 pp. 4669-4682.

Effects of straw, sawdust and sand bedding on dairy manure composting. / Michel, Frederick C.; Keener, Harold M.; Rigot, Jerome; Wilkinson, Tom; Pecchia, John.

2004. 4669-4682 Paper presented at ASAE Annual International Meeting 2004, Ottawa, ON, Canada.

Research output: Contribution to conferencePaper

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Michel FC, Keener HM, Rigot J, Wilkinson T, Pecchia J. Effects of straw, sawdust and sand bedding on dairy manure composting. 2004. Paper presented at ASAE Annual International Meeting 2004, Ottawa, ON, Canada.