| dc.description.abstract | Water minimization in wet process of robusta coffee can improve coffee bean quality while reduce the volume of coffee
wastewater. However, this process increases the concentration of organic material in wastewater up to 100% that requires
specific handling. High organic matter content in wastewater has potential to be utilized as a source of renewable energy through
anaerobic process. The objective of this study is to determine the potential biodegradability of coffee wastewater that has high
concentration of organic material into biogas using a composite of microorganisms derived from specific anaerobic reactor.
Fluctuated coffee wastewater concentration in coffee cherry processing and limited time of coffee harvested cause limited time to
get coffee wastewater with certain concentration. As an approach, this study used instant coffee solution as coffee synthetic
wastewater by considering some different characteristics between them. Results of study showed combination of floccular and
granular sludge that has broad tropic microorganism composite is the best type of bacteria to convert organic matter into biogas.
Moreover, it can overcome acidic environment in coffee wastewater. Since accumulated methane gas reach highest percentages
in high concentration of organic matter, it is better to degrade with low rate handling anaerobic | en_US |
