Composting of de-inking sludge from the recycled paper manufacturing industry
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 add...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2005 |
| País: | España |
| Institución: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:163551 |
| Acceso en línea: | https://ddd.uab.cat/record/163551 https://dx.doi.org/urn:doi:10.1016/j.biortech.2004.09.025 |
| Access Level: | acceso abierto |
| Palabra clave: | C/N ratio Composting Hygienization Respiratory quotient Recycled paper manufacturing sludge |
| Sumario: | 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. |
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