Reduction of foodborne pathogens during cattle manure composting with addition of calcium cyanamide

Abstract

Inactivation of four species of foodborne pathogens (E. coli, Salmonella, E. faecalis, and S. aureus) was investigated during laboratory-scale composting of fresh cow manure with addition of calcium cyanamide (CaCN 2 ) at constant temperature conditions, and the effects of temperature and additive content of CaCN 2 on the efficacy of inactivation were evaluated. At different composting temperatures (20, 30, 37 and 50 8C), a significant inhibition or quick inactivation of pathogens were observed during 10 d composting with addition of 2.0% CaCN 2 , and the effect was more obvious at mesophilic temperatures compared to thermophilic temperature. Therefore, the ideal additive content of CaCN 2 was determined at 30 8C through mixing 2.0%, 2.5%, and 3.0% CaCN 2 with manure. With increase in additive content of CaCN 2 , the efficacies of pathogen inactivation also increased. However, the result indicates that, no less than 2.5% CaCN 2 should be mixed with the manure to entirely eliminate the pathogens during composting.

Cultivable bacterial diversity and early plant growth promotion by the traditional organic formulations prepared using organic waste materials

“…Particularly, antibiotic-producing microorganisms in organic formulations might have played an important role in eliminating foodborne pathogens and phytopathogens (Qiu et al 2012). Similar to this, composting of cow dung was also reported to be effective in removing foodborne pathogens such as S. aureus and E. coli (Simujide et al 2013). Recently, Liu et al (2013) reported that the inoculation of antagonistic bacteria with organic formulations was found to be effective in phytopathogen control.…”

“…and Campylobacter sp. (Simujide et al 2013). In line with this, our results also showed the presence of S. aureus and E. coli pathogens in cow dung.…”

Evaluation of calcium cyanamide addition during co-composting of manure and maize straw in a forced-aeration static-pile system

“…Our previous works showed that the E. coli and other pathogens could be entirely killed with the addition of CaCN 2 in the cow manure composting [10, 45]. And all of the tested E. coli strains with different types of serogroups were quickly inactivated in the compost piles added CaCN 2 [10].…”

Experimental research of efficiency of semi‐continuous and periodic biogas production processes by using chicken manure bioloadings

“…A big amount of organic waste is produced because of a huge demand and relative production scale. Lifestock manure has potential negative impact on the environment and human health (Hu, Cheng, & Tao, ; Rasse et al, ; Simujide et al, ). However, these by‐products of farming can also be considered as a potential inexhaustible energy source and fertilizers (Arlauskienė, Maikštėnienė, & Šlepetienė, ; Esteves, Herrera, Esteves, & Morgado, ; Li et al, ).…”