Title:
Optimization of Bio-Methane Production from Dairy Waste Water by Applying of Lactic Acid Bacteria in the Acidification Stage
Author(s):
Juodeikiene, G., Cizeikiene, D., Bartkiene, E., Damasius, J., Glasner, C.
Document(s):
Paper
Poster
Abstract:
Dairy wastewater (WW) are huge pollutants and at the same time suitable material for renewable energy (biogas) production. The aim of this research was to investigate the possible reuse of dairy WW in biogas by applying two separate stages – acetogenesis (fermentation with lactic acid bacteria) and methanogenesis. The results confirm that bio-methane could be produced from dairy WW and dairy "clean in place" (CIP) water. WW origin, the separation of biogas production stages, methanogenesis temperature, methanogenesis duration, ratio of sludge and WW have influenced the yield of bio-methane. The highest bio-methane yield (75.3%) was observed from dairy WW samples after II separate stages (acetogenesis and methanogenesis) of bio-methane production, when methanogenesis was carried out at 37oC temperature for 11 days. The content of H2S during biogas production raised with increased fermentation temperature. Moreover, chemical oxygen demand (COD) and bio-chemical oxygen demand (BOD) could be significantly reduced (respectively 93.2 and 98.2%) after the pre-treatment of dairy WW with lactobacilli and anaerobic sludge.
Keywords:
anaerobic digestion, biogas, methane, wastewater
Topic:
Biomass Conversion Technologies for Liquid and Gaseous Fuels, Chemicals and Materials
Subtopic:
Biomethane
Event:
24th European Biomass Conference and Exhibition
Session:
3BV.3.14
Pages:
1162 - 1167
ISBN:
978-88-89407-165
Paper DOI:
10.5071/24thEUBCE2016-3BV.3.14
Price:
FREE
