Date: Monday, 26 April 2021
Time: 17:30 - 18:30 CEST
Session code IAV.7
Sustainable Resources for Bio-Based Industrial Processing
Use of HTC for Utilization of the Forest Industry Sludges
Short Introductive summary
The objective of this study is to discuss properties and treatment of the forest industry sludges. Primary, bio- and tertiary sludges are side streams formed in the pulp mill wastewater treatment. Their disposal and reuse is challenging due to sludge properties. Tightening legislation regarding waste treatment and disposal, and the growing need to increase efficiency in all the unit processes of a pulp mill act as driving forces to find environmental-friendly and energy-efficient ways for sludge treatment. Currently, sludges are often combusted in mill’s boilers. This study compares the currently used methods for primary, bio- and tertiary sludge handling in kraft pulp mills and presents two potential new methods, namely, biogas production and hydrothermal carbonization (HTC) and discusses their first industrial trials. These processes are also presented in more detail by introducing mill example cases and via reference mill calculations. The study shows that HTC process could transform the biosludge treatment process from an energy consumer into an energy producer.
Presenter
Esa VAKKILAINEN
LUT University, Laboratory of Sustainable Energy Systems
Presenter's biography
Current Organisation:Laboratory of Sustainable Energy Systems at LUT University Currently Professor in Sustainable Energy Systems Previously 2001-2009 Leading expert recovery, Pöyry Forest Industry Oy, Forest Industry Engineering, Recovery, Energy and Environment
Biographies and Short introductive summaries are supplied directly by presenters and are published here unedited
Co-authors:
K Kuparinen, LUT University, Lappeenranta, FINLAND
S Lipiäinen, LUT University, Lappeenranta, FINLAND
Session reference: IAV.7.13