Solid-State Anaerobic Digestion of Dairy Manure from a Sawdust-Bedded Pack Barn: Moisture Responses

Eunjong Kim, Seunghun Lee, Hyeonsoo Jo, Jihyeon Jeong, Walter Mulbry, Shafiqur Rhaman and Heekwon Ahn
Additional contact information
Eunjong Kim: Department of Animal Biosystems Science, Chungnam National University, Daejeon 34134 South Korea
Seunghun Lee: Department of Animal Biosystems Science, Chungnam National University, Daejeon 34134 South Korea
Hyeonsoo Jo: Department of Animal Biosystems Science, Chungnam National University, Daejeon 34134 South Korea
Jihyeon Jeong: Department of Environmental Engineering, Chungnam National University, Daejeon 34134, South Korea
Walter Mulbry: Sustainable Agricultural Systems Laboratory, United States Department of Agriculture-Agricultural Research Service, Beltsville, MD 20705, USA
Shafiqur Rhaman: Department of Agricultural & Biosystems Engineering, North Dakota State University, Fargo, ND 58108 USA
Heekwon Ahn: Department of Animal Biosystems Science, Chungnam National University, Daejeon 34134 South Korea

Energies, 2018, vol. 11, issue 3, 1-10

Abstract: Bedded pack manure has long been considered an unsuitable feedstock for conventional anaerobic digestion systems due to its high solids content. However, solid-state anaerobic digestion (SS-AD) provides an opportunity to generate methane from such high-solids feedstocks. This study was conducted to determine the influence of moisture content on the digestion of bedded pack dairy manure using SS-AD. Mixtures of sawdust bedding and dairy manure were prepared with moisture contents (MCs) of 70, 76, and 83% and digested at 37 °C for 85 days. The performance of digesters containing manure at 83% MC was 1.3 to 1.4-fold higher than that of digesters containing 70% MC manure in terms of volatile solids (VS) reduction and biogas production. VS reduction rates were 55 to 75% and cumulative methane yield ranged from 64 to 90 NmL (gVS) ?1 . These values are lower than those from SS-AD of fresh manure and this is likely due to the partial decomposition of biodegradable materials during the two to three-month period before the manure was removed from the barn. However, in terms of efficient management of farm odors and providing a renewable energy source for heating, SS-AD of bedded pack manure offers a potential alternative to the conventional composting systems currently in use.

Keywords: dairy manure; solid-state anaerobic digestion; moisture content; biogas; methane (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://www.mdpi.com/1996-1073/11/3/484/pdf (application/pdf)
https://www.mdpi.com/1996-1073/11/3/484/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:11:y:2018:i:3:p:484-:d:133220

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().