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Co-composting of food waste and swine manure augmenting biochar and salts: Nutrient dynamics, gaseous emissions and microbial activity

Authors
Ravindran, BalasubramaniAwasthi, Mukesh KumarKarmegam, NatchimuthuChang, Soon WoongChaudhary, Dhiraj KumarSelvam, AmmaiyappanDinh Duc NguyenMilon, Ashequr RahmanMunuswamy-Ramanujam, Ganesh
Issue Date
Jan-2022
Publisher
ELSEVIER SCI LTD
Keywords
Biochar; Composting; Food waste; Nitrogen conservation; Swine manure
Citation
BIORESOURCE TECHNOLOGY, v.344
Indexed
SCIE
SCOPUS
Journal Title
BIORESOURCE TECHNOLOGY
Volume
344
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/186335
DOI
10.1016/j.biortech.2021.126300
ISSN
0960-8524
1873-2976
Abstract
The prominent characteristics of the biochar, high porosity, sorption capacity with low density improve the aeration, making it a desirable amendment material for composting process. The composting efficiency was analysed by the impact of rice husk biochar amendment (0, 2, 4, 6, 8 and 10%) in the presence of salts for the co-composting of food waste and swine manure, in composting reactors for 50 days. Results revealed that biochar amendment had improved the degradation rates by microbial activities in comparison with control. The final compost quality was improved by reducing the bulk density (29-53%), C/N ratio (29-57%), gaseous emissions (CO2, CH4, and NH3) and microbial pathogens (Escherichia coli and Salmonella sp.). However, 6% biochar amendment had significant improvement in compost quality, degradation rates and nutritional value which is recommended as the ideal ratio for obtaining mature compost from the feedstock, food waste and swine manure.
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