Back to Search
Start Over
Differentiated strategies of animal-derived and plant-derived biochar to reduce nitrogen loss during paper mill sludge composting
- Source :
- Bioresource technology. 360
- Publication Year :
- 2022
-
Abstract
- This work aimed to reveal the differences of nitrogen (N) transformation between animal-derived and plant-derived biochar during paper mill sludge composting. Three treatments were established, including CK (no biochar), ABC (animal-derived biochar), and PBC (plant-derived biochar). Results showed that N loss was reduced by 24.43% and 35.50% in ABC and PBC, respectively, compared with CK. Moreover, the contents of acid-insoluble N (AIN) in ABC and bioavailable organic N (BON) in PBC were 6.180 g/kg and 9.269 g/kg higher than in CK (2.602 g/kg and 8.988 g/kg). The protease activity and bacterial abundance associated with the generation of humic N-containing precursors increased in ABC. Low urease activity and a more complex bacterial N-cycling network were found in PBC. Structural equation model confirmed that AIN formation and BON retention were the dominant strategies for animal-derived and plant-derived biochar, respectively. The findings provided multiple pathways to produce N-enriched compost products.
Details
- ISSN :
- 18732976
- Volume :
- 360
- Database :
- OpenAIRE
- Journal :
- Bioresource technology
- Accession number :
- edsair.doi.dedup.....f8c7680b17c9a0aa5393e73ed916a889