Nutrient and Pathogen Suppression Properties of Anaerobic Digestates from Dairy Manure and Food Waste Feedstocks

2019 ◽  
Vol 11 (12) ◽  
pp. 6565-6573 ◽  
Author(s):  
Brendan J. O’Brien ◽  
Deborah A. Neher ◽  
Eric D. Roy
Keyword(s):  
Food Waste ◽  
Dairy Manure ◽  
Pathogen Suppression ◽  
Anaerobic Digestates

scholarly journals Nutrient and pathogen suppression properties of anaerobic digestates from dairy manure and food waste feedstocks

2019 ◽  
Author(s):  
Brendan J O'Brien ◽  
Deborah A Neher ◽  
Eric D Roy
Keyword(s):  
New England ◽  
Food Waste ◽  
Nutrient Recycling ◽  
The United States ◽  
Dairy Manure ◽  
Nitrogen And Phosphorus ◽  
Soil Pathogens ◽  
Pathogen Suppression ◽  
Biogas Energy ◽  
Policy Measures

Anaerobic co-digestion of dairy manure and food wastes is increasing in the New England region of the United States because of policy measures intended to divert organic materials from landfills, reduce greenhouse gas emissions, and increase renewable biogas energy production. The sustainability of this approach depends on the management and valorization of remaining solid and liquid residues (i.e., digestates) after anaerobic digestion. Few studies have characterized digestates derived from combined dairy manure and food waste feedstocks. In this study, we analyzed screw-press separated liquid and solid digestates from 6 of 26 (23%) operational full-scale facilities in New England. We quantified multiple pools of nitrogen and phosphorus in these materials, with results suggesting that in most cases these nutrients largely exist in forms that can be recycled via slow-release fertilization, with smaller fractions in forms more easily lost to the environment. Furthermore, we found that solid digestates can inhibit mycelial growth of a common soilborne fungal pathogen, Rhizoctonia solani, suggesting potential to manage resident soil pathogens. Capitalizing on both nutrient recycling and pathogen suppression co-benefits will likely be useful in digestate valorization efforts.

scholarly journals Nutrient and pathogen suppression properties of anaerobic digestates from dairy manure and food waste feedstocks

2019 ◽  
Author(s):  
Brendan J O'Brien ◽  
Deborah A Neher ◽  
Eric D Roy
Keyword(s):  
New England ◽  
Food Waste ◽  
Nutrient Recycling ◽  
The United States ◽  
Dairy Manure ◽  
Nitrogen And Phosphorus ◽  
Soil Pathogens ◽  
Pathogen Suppression ◽  
Biogas Energy ◽  
Policy Measures

Anaerobic co-digestion of dairy manure and food wastes is increasing in the New England region of the United States because of policy measures intended to divert organic materials from landfills, reduce greenhouse gas emissions, and increase renewable biogas energy production. The sustainability of this approach depends on the management and valorization of remaining solid and liquid residues (i.e., digestates) after anaerobic digestion. Few studies have characterized digestates derived from combined dairy manure and food waste feedstocks. In this study, we analyzed screw-press separated liquid and solid digestates from 6 of 26 (23%) operational full-scale facilities in New England. We quantified multiple pools of nitrogen and phosphorus in these materials, with results suggesting that in most cases these nutrients largely exist in forms that can be recycled via slow-release fertilization, with smaller fractions in forms more easily lost to the environment. Furthermore, we found that solid digestates can inhibit mycelial growth of a common soilborne fungal pathogen, Rhizoctonia solani, suggesting potential to manage resident soil pathogens. Capitalizing on both nutrient recycling and pathogen suppression co-benefits will likely be useful in digestate valorization efforts.

Anaerobic co-digestion of commercial food waste and dairy manure: Characterizing biochemical parameters and synergistic effects

2016 ◽  
Vol 52 ◽  
pp. 286-294 ◽  
Author(s):  
Jacqueline H. Ebner ◽  
Rodrigo A. Labatut ◽  
Jeffrey S. Lodge ◽  
Anahita A. Williamson ◽  
Thomas A. Trabold
Keyword(s):  
Food Waste ◽  
Biochemical Parameters ◽  
Synergistic Effects ◽  
Dairy Manure

Co-Digestion of Food Waste and Dairy Manure for Biogas Production

2007 ◽  
Vol 50 (5) ◽  
pp. 1815-1821 ◽  
Author(s):  
H. M. El-Mashad ◽  
R. Zhang
Keyword(s):  
Food Waste ◽  
Biogas Production ◽  
Dairy Manure

scholarly journals Fertilizing potential and CO2 emissions following the utilization of fresh and composted food-waste anaerobic digestates

2020 ◽  
Vol 698 ◽  
pp. 134198 ◽  
Author(s):  
Marco Grigatti ◽  
Lorenzo Barbanti ◽  
Muhammad Umair Hassan ◽  
Claudio Ciavatta
Keyword(s):  
Co2 Emissions ◽  
Food Waste ◽  
Anaerobic Digestates

Integrating anaerobic co-digestion of dairy manure and food waste with cultivation of edible mushrooms for nutrient recovery

2019 ◽  
Vol 285 ◽  
pp. 121312 ◽  
Author(s):  
Brendan J. O'Brien ◽  
Eric Milligan ◽  
Jon Carver ◽  
Eric D. Roy
Keyword(s):  
Food Waste ◽  
Dairy Manure ◽  
Edible Mushrooms ◽  
Nutrient Recovery

Life Cycle and Economic Assessment of Anaerobic Co-digestion of Dairy Manure and Food Waste

2015 ◽  
Vol 11 (2) ◽  
pp. 127-139 ◽  
Author(s):  
Rui Chen ◽  
M. Melissa Rojas-Downing ◽  
Yuan Zhong ◽  
Christopher M. Saffron ◽  
Wei Liao
Keyword(s):  
Life Cycle ◽  
Food Waste ◽  
Economic Assessment ◽  
Dairy Manure

scholarly journals Physical Properties of Dairy Manure Pre- and Post-Anaerobic Digestion

2019 ◽  
Vol 9 (13) ◽  
pp. 2703
Author(s):  
Hui Wang ◽  
Horacio A. Aguirre-Villegas ◽  
Rebecca A. Larson ◽  
Asli Alkan-Ozkaynak
Keyword(s):  
Anaerobic Digestion ◽  
Physical Properties ◽  
Linear Model ◽  
Food Waste ◽  
Dairy Farms ◽  
Dairy Manure ◽  
Biogas Yield ◽  
Volatile Solids ◽  
Anaerobically Digested Dairy Manure ◽  
Sand Bedding

Manure characteristics change through processing, including anaerobic digestion (AD). These changes can alter handling of manure during downstream operations. This study analyzed the density, total solids (TS) content, and volatile solids (VS) content of pre-digested and anaerobically digested dairy manure from seven dairy farms in Wisconsin. The density of pre-digested manure increased from 990 to 1065 kg m−3 as the TS level increased from 1.5% to 13.0%. Density and TS for pre-digested manure from facilities using separated solids as bedding were related with a linear model for TS ranging from 1.5% to 13.0% and with a polynomial model for TS ranging from 1.5% to 50%. The model shows that density decreases with an increasing TS content when TS is greater than 8.0%. Manure from dairy facilities that used sand bedding had a VS/TS ratio of 0.87. This ratio was higher than the ratio when manure solids were used as bedding (0.81) and when food waste was incorporated into the digester (0.77). This study also provides a simple methodology to estimate biogas yield by using the density of pre- and post-digested manure.

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