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Enhancing grass-fed anaerobic digestion by mechanical cotreatment
Identification_Information:
Citation:
Citation_Information:
Originator:The Pennsylvania State University
Publication_Date:2023
Title:
Enhancing grass-fed anaerobic digestion by mechanical cotreatment
Other_Citation_Details:
Anahita Bharadwaj (a), Evert K. Holwerda (b), John M. Regan (c), Lee R. Lynd (b) and Tom L. Richard (a)* (a) The Department of Agricultural and Biological Engineering, The Pennsylvania State University, University Park, PA, 16802, USA (b) Thayer School of Engineering, Dartmouth College, Hanover, NH 03755 (c) The Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
Online_Linkage: http://www.datacommons.psu.edu
Description:
Abstract: 
The aim of this study was to increase the accessibility and accelerate the breakdown of lignocellulosic biomass in an anaerobic fermentation system by mechanical cotreatment: milling during fermentation, as an alternative to conventional pretreatment prior to biological deconstruction. Effluent from a mesophilic anaerobic digester running with unpretreated senescent switchgrass as the predominant carbon source was subjected to ball milling for 0.5, 2, 5 and 10 minutes. A batch fermentation test was conducted with this material in triplicate for 18 days with unmilled effluent as the ‘status quo’ control. The results indicate 0.5 – 10 minutes of cotreatment increased sugar solubilization by 5– 13% when compared to the unmilled control, with greater solubilization correlated with increased milling duration. Cotreatment also increased biogas production and decreased mean particle size. Energy consumption measurements of a lab-scale mill indicate that longer durations of milling offer diminishing benefits with respect to additional methane production. Cotreatment in anaerobic digestion systems, as demonstrated in this study, provides an alternative approach to conventional pretreatments to increase biogas production from lignocellulosic grassy material.
Supplemental_Information: 
Anahita Bharadwaj (a), Evert K. Holwerda (b), John M. Regan (c), Lee R. Lynd (b) and Tom L. Richard (a)*
(a) The Department of Agricultural and Biological Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
(b) Thayer School of Engineering, Dartmouth College, Hanover, NH 03755
(c) The Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
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Time_Period_Information:
Single_Date/Time:
Calendar_Date:2023
Currentness_Reference: 
publication date
Keywords:
Theme:
Theme_Keyword_Thesaurus:ISO 19115 Topic Categories
Theme_Keyword:farming
Access_Constraints:None.
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The University makes no warranty or representation, either express or implied, with respect to the FILES or accompanying documentation, including its quality, performance, merchantability, or fitness for a particular purpose. The FILES and documentation are provided "as is" and the USER assumes the entire risk as to its quality and performance.
The University will not be liable for any direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the FILES or any accompanying documentation.
The USER is granted permission to translate and add value to the FILES for the use of the FILES on its computer hardware; provided, however, that the USER annually notify the University of any customizing or value-adding work done.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person:Anahita Bharadwaj
Contact_Organization:Penn State
Contact_Address:
Address_Type:mailing and physical address
City:University Park
State_or_Province:Pennsylvania
Postal_Code:16802
Country:United States
Contact_Electronic_Mail_Address:anahita.b02@gmail.com
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Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:Penn State Data Commons
Contact_Address:
Address_Type:mailing and physical address
Address: 
115 Land and Water Building
City:University Park
State_or_Province:Pennsylvania
Postal_Code:16802
Country:United States
Contact_Voice_Telephone:(814) 865 - 8792
Contact_Electronic_Mail_Address:datacommons@psu.edu
Distribution_Liability: 
The USER shall indemnify, save harmless, and, if requested, defend those parties involved with the development and distribution of this data, their officers, agents, and employees from and against any suits, claims, or actions for injury, death, or property damage arising out of the use of or any defect in the FILES or any accompanying documentation. Those parties involved with the development and distribution excluded any and all implied warranties, including warranties or merchantability and fitness for a particular purpose and makes no warranty or representation, either express or implied, with respect to the FILES or accompanying documentation, including its quality, performance, merchantability, or fitness for a particular purpose. The FILES and documentation are provided "as is" and the USER assumes the entire risk as to its quality and performance. Those parties involved with the development and distribution of this data will not be liable for any direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the FILES or any accompanying documentation.
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Metadata_Reference_Information:
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:Penn State Data Commons
Contact_Position:Metadata Coordinator
Contact_Address:
Address_Type:mailing address
Address: 
115 Land and Water Building
City:University Park
State_or_Province:Pennsylvania
Postal_Code:16802
Country:United States
Contact_Voice_Telephone:814-865-8792
Contact_Electronic_Mail_Address:datacommons@psu.edu
Metadata_Standard_Name:FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version:FGDC-STD-001-1998
Metadata_Time_Convention:local time
Metadata_Extensions:
Profile_Name:ESRI Metadata Profile
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