Anaerobic Digestion and Pyrolysis Feasibility Studies to Support the GLWA Biosolids Master Plan Steven Safferman a* , Umesh Adhikari a , Christopher Saffron a , Wendy Barrott b , Andrea Busch b , Xavier Fonoll Almansa b , John Norton b a Department of Biosystems and Agricultural Engineering, Michigan State University B Great Lakes Water Authority, Detroit, Michigan *[email protected]; 517-432-0812
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Anaerobic Digestion and Pyrolysis Feasibility Studies to Support … · Anaerobic Digestion and Pyrolysis Feasibility Studies to Support the GLWA Biosolids Master Plan Steven Safferman
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Anaerobic Digestion and Pyrolysis Feasibility Studies to
Support the GLWA Biosolids Master Plan
Steven Saffermana*, Umesh Adhikaria, Christopher Saffrona,
Wendy Barrottb, Andrea Buschb, Xavier Fonoll Almansab, John Nortonb
a Department of Biosystems and Agricultural Engineering, Michigan State UniversityB Great Lakes Water Authority, Detroit, Michigan
• Biosolids contain a relatively low amount of biodegradable carbon but high amount of nutrients.
• Food processing and food service waste are rich in biodegradable carbon but contain low level of nutrients.
• Co-digestion of food processing and food service waste with biosolids has the potential to increase biogas production without the routine addition of amendments.
3. Design, Construction, and Installation of a Pilot-Scale
Anaerobic Digester
3. Design, Construction, and Installation of a Pilot-Scale
Anaerobic Digester
3. Design, Construction, and Installation of a Pilot-Scale
Anaerobic Digester
3. Design, Construction, and Installation of a Pilot-Scale
Anaerobic Digester
EBS®: % of the total g VS
CH4 without EBS: 0.30 ± 0.06 LCH4 /gVSadded
CH4 with EBS: 0.48 ± 0.08 LCH4/gVSadded
4. Anaerobic Digestion Pilot-Scale Evaluations
• BMP assays were used to screen feedstocks, optimize biosolids/feedstock ratios, and test pre-treatment options.
• Co-digestion of the biosolids at the Detroit Wastewater Resource Recovery Facility is synergistic, with the potential to significantly increase biogas production.
• Thermal and sonication pre-treatments did not improve total biogas production or biogas production rate.
• Tested enzymes were not economically feasible.
• Anaerobic digestion of the co-digestion of biosolids with food waste was verified in the pilot-scale digesters.
• Up to 50% (by VS) of the EBS® was successfully co-digested with biosolids.
• Hydrogen sulfide was not found to be an issue – always remained below 100 ppm.
• Techno-Economic Evaluation needs to be conducted to determine practical feasibility.
1 – 4. Anaerobic Digestion Conclusions
Objectives
Estimate the biogas, bio-oil and biochar potential from Pyrolysis