The Economy of Biogas Production using Sludge from Pulp and Paper Mills

Hagelqvist, A. – COWI AB


Large masses of sludge will inevitably be generated as by-product in the wastewater treatment plants of pulp and paper mills. Previously it has been shown that anaerobic digestion of this sludge is feasible and its low degradability will be compensated by the large quantities available for treatment. It has become evident though that the future of such a production system might not lie in the hands of the sludge producers, but rather a new player might be more suited to own and run it. A pre-study of an integrated production system that generates biogas from pulp and paper mill sludge will be done in this study with the aim to present all data that is required for making decisions on whether such an investment is sound. The process will be visualised and an investment estimate within ±30% will be provided in order to facilitate implementation.

The Biosolids conference attracts the most authoritative global experts in the area of biosolids and organic resource handling, treatment and recycling. The programme covers both the latest innovations and updates of existing technologies. Presentations from respected industry experts and newcomers follow the development of technologies and legislation from inception to full-scale installations.

The conference regularly gathers over 200 delegates from all over Europe, many of them return every year both for the technical presentations and fantastic networking opportunities.

Regular conference themes include:

• Thickening and Dewatering
• Modelling Sludge Handling and Utilisation
• Commissioning and Operating Experiences with Thermal Hydrolysis
• Tackling Potential Odour Problems
• Operating Experiences and Potential Problems in Digester Operation
• Ensuring Optimum Energy Recovery from Biogas
• Liquor Treatment and P Removal
• Alternative Products from Sludge
• Enhancing the Value of Biosolids and Digestate
• Pathogens and Pollutants In Digestate
• Sharing Experiences

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