Composting of de-inking sludge from the recycled paper manufacturing industry

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(Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Artola Casacuberta, Adriana

(Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Sanchez, Antoni

(Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Data:	2005
Resum:	Composting of two different types of sludge from the recycled paper manufacturing industry was carried out at laboratory scale. Physico-chemical sludge (PCS) from the de-inking process and biological sludge (BS) from the wastewater treatment plant were composted and co-composted with and without addition of a bulking material. Despite its poor initial characteristics (relatively high C/N ratio, low organic content and moisture), PCS showed excellent behaviour in the composting process, reaching and maintaining thermophilic temperatures for more than 7 days at laboratory scale, and therefore complete hygienization. Pilot scale composting of PCS was also studied, and a respiratory quotient of 1. 19 was obtained, indicating a full aerobic biological process. Respiration tests showed a complete stabilization of the material, with final values of the static respiration index in the range of 1. 1 mg O₂ g TOM⁻¹ h⁻¹. Composting is proposed as a suitable technology for the effective recycling of this type of sludge from the recycled paper manufacturing industry.
Ajuts:	Ministerio de Ciencia y Tecnología REN2003-00823
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Matèria:	C/N ratio; ; Composting ; Hygienization ; Respiratory quotient ; Recycled paper manufacturing sludge
Publicat a:	Bioresource technology, Vol. 96, issue 10 (July 2005) , p. 1161-1167, ISSN 0960-8524

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