Title:
Biochemical Methane Potential Determination of the Solid Waste - "Brewer's Spent Yeast" as Optional Anaerobic Waste Treatment
Author(s):
Sosa-Hernández, O., Parameswaran, P., Torres, C., Cárdenas-Chávez, D., Parra, R.
Document(s):
Paper
Poster
Abstract:
Potential alternative uses of byproducts and solid wastes from Brewing Industry should be explored. Large amounts of brewer’s spent yeast (SY) are commonly used as cattle food or as lowvalue compost; however this waste still has an important potential for energy production. Anaerobic digestion treatment of this waste can offer direct benefits to the brewing process. In this work, biodegradability of brewer’s SY was determined using the biochemical methane potential (BMP) assay. Anaerobic digested sludge from a wastewater treatment plant was used as inoculum. In order to compare, the BMP assay samples were also diluted with deionized water (75, 50 and 25%) and a positive control prepared with anaerobic sludge media enriched with acetate. A pH adjustment of the sample was required prior to the experiment. The highest cumulative methane volume (158 ml) was produced after 45 days using 50% diluted sample which corresponded to 45% COD conversion to methane. A mass balance was carried out to calculate the COD removal and efficiency of the experiments. Results of the BMP assay showed certain digestion inhibition that can be associated to the characteristics of the waste. That effect can be minimized with a proper dilution, like the one utilized here.
Keywords:
anaerobic digestion, biodegradability, methane, spent yeast
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Anaerobic digestion for biogas production
Event:
22nd European Biomass Conference and Exhibition
Session:
2CV.1.29
Pages:
829 - 832
ISBN:
978-88-89407-52-3
Paper DOI:
10.5071/22ndEUBCE2014-2CV.1.29
Price:
FREE
