Deinking sludge compost stability and maturity assessment using Fourier transform infrared spectroscopy and thermal analysis.
Waste Manag Res
; 37(10): 1043-1057, 2019 Oct.
Article
em En
| MEDLINE
| ID: mdl-31395003
ABSTRACT
Thermal composting is an important and useful way to transfer raw organic matter into value-added product rich in humic substances. Furthermore, thermal composting is a very promising way to reduce deinking paper sludge pollutions, which are difficult to remove. The objective of this study was to investigate the behaviour of the composting process of deinking paper sludge with poultry manure over 14 months. Two composts were used C1 (70/30 deinking paper sludge/poultry manure) and C2 (50/50 deinking paper sludge/poultry manure). The compost stability and maturity were assessed via physico-chemical and thermal analyses thermogravimetric analysis, differential thermal analysis and diffuse reflectance infrared Fourier transform spectroscopy. Diffuse reflectance infrared Fourier transform spectroscopy analysis provided chemical information for the presence of aromatic, phenolic, aliphatic and polysaccharidic structures. Thermogravimetry analyses revealed that both deinking paper sludge composts were rich in humic acids. The ratio E4/E6 (fulvic acids/humic acids) was also carried out to characterise the maturity index of composts. After 14 months, the compost C2 is more stable, mature and rich in humic acids than compost C1. Furthermore, the addition of poultry manure to the deinking paper sludge-based composts enhanced the formation of humic substances. From 0 to 14 months of composting, the concentration of polychlorinated biphenyls decreased from 0.2 to 0.1 mg kg-1 and from 0.6 to 0.2 mg kg-1 for C1 and C2, respectively.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Compostagem
Limite:
Animals
Idioma:
En
Revista:
Waste Manag Res
Assunto da revista:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Canadá