Laboratory of Biomaterial, University of Quebec in Abitibi-Témiscamingue, Rouyn-Noranda, Quebec, Canada.
Horticultural Science Laboratory, National Agronomic Institute of Tunisia (INAT), Tunis, Tunisia.
Waste Manag Res. 2019 Oct;37(10):1043-1057. doi: 10.1177/0734242X19864638. Epub 2019 Aug 8.
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 and from 0.6 to 0.2 mg kg for C1 and C2, respectively.
热堆肥是将原始有机物转化为富含腐殖质的增值产品的重要且有用的方法。此外，热堆肥是减少难以去除的脱墨纸污泥污染的一种很有前途的方法。本研究的目的是研究 14 个月内脱墨纸污泥与家禽粪便堆肥过程的行为。使用了两种堆肥：C1（70/30：脱墨纸污泥/家禽粪便）和 C2（50/50：脱墨纸污泥/家禽粪便）。通过物理化学和热分析评估堆肥的稳定性和成熟度：热重分析、差热分析和漫反射红外傅里叶变换光谱。漫反射红外傅里叶变换光谱分析提供了存在芳香族、酚类、脂肪族和多糖结构的化学信息。热重分析表明，两种脱墨纸污泥堆肥都富含腐殖酸。还进行了 E4/E6（富里酸/腐殖酸）比值，以表征堆肥的成熟度指数。经过 14 个月，堆肥 C2 比堆肥 C1 更稳定、成熟且富含腐殖酸。此外，向基于脱墨纸污泥的堆肥中添加家禽粪便增强了腐殖质的形成。从堆肥的 0 到 14 个月，C1 和 C2 中的多氯联苯浓度分别从 0.2 降至 0.1mg·kg-1 和从 0.6 降至 0.2mg·kg-1。
