Beer lees and ceramsite amendments enhance the two-stage co-composting of green waste.
Bioresour Technol
; 335: 125288, 2021 Sep.
Article
in En
| MEDLINE
| ID: mdl-34000698
ABSTRACT
Composting is a major way to process green waste (GW), and amendments are important in GW composting. In this study of the two-stage co-composting of GW, beer lees (0, 25, 30%) and/or ceramsite (0, 10, 15%) were assessed as amendments. Changes in bulk density, porosity, temperature, pH, gaseous emissions, dissolved organic carbon (DOC) and nitrogen (DON), lignocellulose degradation, microbial abundances, and phytotoxicity were assessed during GW composting with the amendments. Treatments with a combination of beer lees and ceramsite had positive effects, and 25% beer lees and 15% ceramsite optimized all compost parameters. The optimal combination of amendments extended the thermophilic phase, enhanced the lignocellulose decomposition, and generated a stable and mature product in 20 days. Consequently, the best final compost was not phytotoxic (germination index 164%), was mature (void space ratio 48.48, pH 7.20, and DOC/DON ratio 0.51), and nutrient-rich (especially for N 5.13%, P 1.84%, and K 0.68%).
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Composting
Language:
En
Journal:
Bioresour Technol
Journal subject:
ENGENHARIA BIOMEDICA
Year:
2021
Document type:
Article