Effect of biochar and bacterial inoculum additions on cow dung composting

[Display omitted] •Influence of biochar and bacterial inoculum amendment on cow dung composting was studied.•12% WSB and bacterial consortium (BC) has lowest carbon and nitrogen loss.•12% WSB and BC has highest bacterial population and degraded efficiency.•12%WSB + BC amendment is superior option fo...

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Bibliographic Details
Published in:Bioresource technology 2020-02, Vol.297, p.122407-122407, Article 122407
Main Authors: Awasthi, Mukesh Kumar, Duan, Yumin, Awasthi, Sanjeev Kumar, Liu, Tao, Zhang, Zengqiang
Format: Article
Language:English
Subjects:
Animals
Bacteria
Bacterial community
Bacterial inoculums
Biochar
Cattle
Charcoal
Composting
Female
Gaseous emissions
Manure
Nitrogen
Soil
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Summary:[Display omitted] •Influence of biochar and bacterial inoculum amendment on cow dung composting was studied.•12% WSB and bacterial consortium (BC) has lowest carbon and nitrogen loss.•12% WSB and BC has highest bacterial population and degraded efficiency.•12%WSB + BC amendment is superior option for cow manure composting.•12%WSB + BC showed strong interrelation between bacterial community and physicochemical factors. The present study evaluates the effectiveness of different types of biochar additives and bacterial inoculation on gaseous emission, nutrient preservation, and relevant functional bacterial community during cow manure composting. The result revealed that biochar and bacterial consortium inoculation effectively inhibited gaseous emission and improved carbon and nitrogen sequestration, remarkably enriching the abundance of the functional bacteria community. Notably, superior efficacy was found in 12% wheat straw biochar and bacterial consortium amendment composting of T6 with the lowest cumulative CO2-C and NH3-N (308.02 g and 12.71 g, respectively), minimal total C and N losses, and the highest bacterial population. Additionally, gaseous emission exhibited a strong correlation between physicochemical properties with intersection of 66.78% and a unique substrate utilizing bacterial communities. Consequently, the integrated application of biochar and bacterial consortium inoculation was suggested as an efficient method to adjust microbial activity and facilitate cellulose-rich waste degradation, enabling efficient management of organic waste from cow manure and wheat straw by composting.
ISSN:0960-8524
1873-2976
1873-2976
DOI:10.1016/j.biortech.2019.122407