TY - JOUR
T1 - An assessment of pathogen removal during composting of the separated solid fraction of pig manure
AU - Mc Carthy, Gemma
AU - Lawlor, Peadar G.
AU - Coffey, Lee
AU - Nolan, Tereza
AU - Gutierrez, Montserrat
AU - Gardiner, Gillian E.
N1 - Funding Information:
We thank Shane Troy for assistance with compost sampling, Rachel Moran, Laura O’Connor, Tony O’Brien and Anne Murphy for technical assistance, John Hannon for help with the construction of dendrograms and Laurie O’Sullivan for critiquing the manuscript. Funding was provided by the Higher Education Authority Technological Sector Research Strand I Programme and the Department of Agriculture and Food’s Research Stimulus Fund Programme . G. Mc Carthy’s PhD is funded by the Teagasc Walsh Fellowship Scheme.
PY - 2011/10
Y1 - 2011/10
N2 - The aim was to investigate pathogen survival during composting of pig manure solids with and without bulking agents in two trials of 56days duration, each with four treatments. Salmonella was detected in the sawdust and straw bulking agents but was undetectable in the compost, except in one treatment at day 0. Enteric indicator organisms were reduced by day 7 (P<0.001) and were undetectable in the final compost, except for coliform which were present at 3.66-4.43log 10CFU/g. Yeasts and moulds were reduced and aerobic spore-formers remained stable in one trial but both increased in the other (P<0.001). Bacillus licheniformis and Clostridium sporogenes were the predominant culturable spore-forming bacteria recovered. Microbial counts were influenced by the bulking agent but only at particular time points (P<0.05). Overall, the pig manure-derived compost complied with EU regulations for processed manure products, as E. coli and Enterococcus were below limits and it was Salmonella-free.
AB - The aim was to investigate pathogen survival during composting of pig manure solids with and without bulking agents in two trials of 56days duration, each with four treatments. Salmonella was detected in the sawdust and straw bulking agents but was undetectable in the compost, except in one treatment at day 0. Enteric indicator organisms were reduced by day 7 (P<0.001) and were undetectable in the final compost, except for coliform which were present at 3.66-4.43log 10CFU/g. Yeasts and moulds were reduced and aerobic spore-formers remained stable in one trial but both increased in the other (P<0.001). Bacillus licheniformis and Clostridium sporogenes were the predominant culturable spore-forming bacteria recovered. Microbial counts were influenced by the bulking agent but only at particular time points (P<0.05). Overall, the pig manure-derived compost complied with EU regulations for processed manure products, as E. coli and Enterococcus were below limits and it was Salmonella-free.
KW - Compost
KW - Indicator microorganisms
KW - Pathogens
KW - Pig manure
KW - Salmonella
UR - http://www.scopus.com/inward/record.url?scp=80052368427&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2011.07.021
DO - 10.1016/j.biortech.2011.07.021
M3 - Article
C2 - 21807501
AN - SCOPUS:80052368427
SN - 0960-8524
VL - 102
SP - 9059
EP - 9067
JO - Bioresource Technology
JF - Bioresource Technology
IS - 19
ER -