Title: The effects of bioadditive in the form of yeasts and zeolite on the composting process and odour emission
Authors: Wenxiu Zhang, Anthony K. Lau
Addresses: Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada. ' Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada
Abstract: The objectives of this paper are to determine the effectiveness of bioadditive in the form of yeasts and zeolite in reducing odour and ammonia emissions during composting and to assess its effects on the process. Two series of experiments were conducted. The higher dosage treatments reached thermophilic temperatures sooner and the high temperatures stayed longer. The application of bioadditive at 10% (w/w) resulted in a greater degree of degradation and ammonia emission was reduced by 50%. Odour emission analysis generates mixed results, though lower odour concentrations and a 12% decrease in total odour emission were observed with higher dosages.
Keywords: poultry litter; active phase composting; bioadditives; odour emissions; ammonia emissions; olfactometry; degree of degradation; thermal performance; yeasts; zeolite.
International Journal of Environmental Engineering, 2011 Vol.3 No.1, pp.1 - 17
Published online: 25 Apr 2015 *Full-text access for editors Access for subscribers Purchase this article Comment on this article