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Post-digestate composting benefits and the role of enzyme activity to predict trace element immobilization and compost maturity
- Source :
- Bioresource technology. 338
- Publication Year :
- 2021
-
Abstract
- The current study evaluated the quality of agricultural waste digestate by composting or co-composting with biogas feedstock (maize silage, food processing waste, or poultry litter). Temperature, phytotoxicity, C/N ratio, water extractable trace elements, and 14 enzyme activities were monitored. Temperature dropped earlier in digestate and maize silage co-composting pile, reducing time to maturity by 20 days. Composting and co-composting reduced phytotoxicity and C/N ratio, but increased immobilization of Al, Ba, Fe, Zn, and Mn at least by 40% in all piles. All the enzyme activities, except arylsulfatase and α-glucosidase, increased at the maturity phase and negatively correlated with organic matter content and most of trace elements. Post-digestate composting or co-composting with biogas feedstock is a promising strategy to improve digestate quality for fertilizer use, and selected enzyme activities can be indicators of compost maturity and immobilization of trace elements.
- Subjects :
- chemistry.chemical_classification
Silage
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Compost
Chemistry
Composting
fungi
Bioengineering
General Medicine
engineering.material
Raw material
Pulp and paper industry
complex mixtures
Trace Elements
Soil
Biogas
Digestate
engineering
Phytotoxicity
Organic matter
Fertilizers
Waste Management and Disposal
Poultry litter
Subjects
Details
- ISSN :
- 18732976
- Volume :
- 338
- Database :
- OpenAIRE
- Journal :
- Bioresource technology
- Accession number :
- edsair.doi.dedup.....b3e2682dc426b22856a574e63ab740be