M. E. Silva and I. BrĂ¡s
Valorization of Beer Brewing Wastes by Composting
232 - 235
2017
11
3
International Journal of Biotechnology and Bioengineering
https://publications.waset.org/pdf/10006597
https://publications.waset.org/vol/123
World Academy of Science, Engineering and Technology
The aim of this work was to study the viability of recycling the residual yeast and diatomaceous earth (RYDE) slurry generated by the beer brewing industry by composting with animal manures, as well as to evaluate the quality of the composts obtained. Two pilot composting trials were carried out with different mixes cow manureRYDE slurry (Pile CM) and sheep manureRYDE slurry (Pile SM). For all piles, wood chips were applied as bulking agent. The process was monitored by evaluating standard physical and chemical parameters. The compost quality was assessed by the heavy metals content and phytotoxicity. Both piles reached a thermophilic phase in the first day, however having different trends. The pH showed a slight alkaline character. The CN reached values lower than 19 at the end of composting process. Generally, all the piles exhibited absence of heavy metals. However, the pile SM exhibited phytotoxicity. This study showed that RYDE slurry can be valorized by composting with cow manure.
Open Science Index 123, 2017