TY - JOUR
T1 - Effects of digestate co-composting on curing phase of composting
AU - Arab, Golnaz
AU - Razaviarani, Vahid
AU - McCartney, Daryl
N1 - Funding Information:
This work was supported by the City of Edmonton and Mitacs – Accelerate ( ITO4535 ). The authors to thank Alberta Innovates - Technology Futures (AI-TF) for supplying the digestate by running high solids anaerobic digestion (HSAD), and the operations and laboratory staff of Edmonton Waste Management Centre (EWMC) for their valuable assistance throughout the project.
Funding Information:
The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Golnaz Arab reports financial support was provided by Mitacs Canada. Golnaz Arab reports financial support was provided by City of Edmonton. Golnaz Arab reports financial support, administrative support, and equipment, drugs, or supplies were provided by University of Alberta. Golnaz Arab reports administrative support and equipment, drugs, or supplies were provided by Edmonton Waste Management Centre.
Funding Information:
This work was supported by the City of Edmonton and Mitacs – Accelerate (ITO4535). The authors to thank Alberta Innovates - Technology Futures (AI-TF) for supplying the digestate by running high solids anaerobic digestion (HSAD), and the operations and laboratory staff of Edmonton Waste Management Centre (EWMC) for their valuable assistance throughout the project.
Publisher Copyright:
© 2022
PY - 2022/9
Y1 - 2022/9
N2 - The effects of adding polished digestate (8-day aerated digestate) into the curing phase of composting was investigated. The polished digestate was mixed with a 30-day composted OFMSW, introduced to eight composters with different mixing ratios and monitored for 100 days. Monitored parameters were temperature, mass changes, total solids, organic matter, pH, and electrical conductivity. Stability and maturity endpoints were also quantified by running respirometry, C:N ratio, NH4:NO3 ratio, and Solvita® tests. The results showed that co-composting of polished digestate and 30-day composted OFMSW did not notably improve the overall composting performance and it decreased when the digestate portion increased. This could be due to the excess aeration of the digestate and/or an unsuitable inoculation time. Over-aeration could result in the volatilization of ammonia and loss of nitrogen. There are two speculations: first, the inoculum consortia might be outcompeted by the indigenous microorganisms. Second, substrate could become a limiting factor.
AB - The effects of adding polished digestate (8-day aerated digestate) into the curing phase of composting was investigated. The polished digestate was mixed with a 30-day composted OFMSW, introduced to eight composters with different mixing ratios and monitored for 100 days. Monitored parameters were temperature, mass changes, total solids, organic matter, pH, and electrical conductivity. Stability and maturity endpoints were also quantified by running respirometry, C:N ratio, NH4:NO3 ratio, and Solvita® tests. The results showed that co-composting of polished digestate and 30-day composted OFMSW did not notably improve the overall composting performance and it decreased when the digestate portion increased. This could be due to the excess aeration of the digestate and/or an unsuitable inoculation time. Over-aeration could result in the volatilization of ammonia and loss of nitrogen. There are two speculations: first, the inoculum consortia might be outcompeted by the indigenous microorganisms. Second, substrate could become a limiting factor.
KW - Anaerobic digestion
KW - Co-composting
KW - Digestate
KW - Inoculation
KW - Organic fraction of municipal solid waste
UR - http://www.scopus.com/inward/record.url?scp=85132933422&partnerID=8YFLogxK
U2 - 10.1016/j.biteb.2022.101121
DO - 10.1016/j.biteb.2022.101121
M3 - Article
AN - SCOPUS:85132933422
SN - 2589-014X
VL - 19
JO - Bioresource Technology Reports
JF - Bioresource Technology Reports
M1 - 101121
ER -
