Optimizing the water utilization in wood-based biorefineries

Activity: Talk or presentationPresentation

Details

Title Optimizing the water utilization in wood-based biorefineries
Person and role
Description The conversion of current pulp mill to true biorefineries can be one of the most important milestones for the development of a future bio-economy. Nowadays, pulp mills are optimised with focus on cellulose fibre production and electricity, while future concepts of pulp mills include the production of bio-chemicals, bio-fuels and advanced materials. To achieve this, current pulp mill concepts have to be converted to lignocellulosic bio-refineries.
The efficient separation of the wood components: cellulose, hemicelluloses, lignin and extractives is key to the concept of lignocellulosic biorefineries and the pressure-driven membrane processes microfiltration, ultrafiltration, nanofiltration and reverse osmosis can have an important role in achieving these challenging separations. However, apart from the efficient separation of the raw material membrane processes can also play an important role in the water loop of wood-based boirefineries. Depending on the type of pulping process 9 to 160 m3 of water are required per air-dried ton of pulp. Considering a 500 production of 500 air-dried tons of pulp per day this results in 5,000 to 80,000 m3 of water per day, which has to be handled.
This presentation will thus focus on the potential use of membrane processes in the water loop of lignocellulosic biorefineries from in-take water preparation to water and product recovery as well as end-of-pipe treatment. Different integration strategies and positions will be presented for different water streams from various pulping processes. Furthermore, the importance of membrane cleaning and its impact on the water consumption will be discussed.
Overall, it will be highlighted that membrane processes will not only have an important role in the raw material separation in wood-based biorefineries as highly selective and energy-saving separation processes but they will be also important water loop from in-take water preparation to end-of-pipe treatment.
Date/period

2017 Nov 172017 Nov 18

Research areas and keywords

UKÄ subject classification

  • Chemical Engineering

Keywords

  • Membrane processes, Biorefineries
Related organisations
The conversion of current pulp mill to true biorefineries can be one of the most important milestones for the development of a future bio-economy. Nowadays, pulp mills are optimised with focus on cellulose fibre production and electricity, while future concepts of pulp mills include the production of bio-chemicals, bio-fuels and advanced materials. To achieve this, current pulp mill concepts have to be converted to lignocellulosic bio-refineries.
The efficient separation of the wood components: cellulose, hemicelluloses, lignin and extractives is key to the concept of lignocellulosic biorefineries and the pressure-driven membrane processes microfiltration, ultrafiltration, nanofiltration and reverse osmosis can have an important role in achieving these challenging separations. However, apart from the efficient separation of the raw material membrane processes can also play an important role in the water loop of wood-based boirefineries. Depending on the type of pulping process 9 to 160 m3 of water are required per air-dried ton of pulp. Considering a 500 production of 500 air-dried tons of pulp per day this results in 5,000 to 80,000 m3 of water per day, which has to be handled.
This presentation will thus focus on the potential use of membrane processes in the water loop of lignocellulosic biorefineries from in-take water preparation to water and product recovery as well as end-of-pipe treatment. Different integration strategies and positions will be presented for different water streams from various pulping processes. Furthermore, the importance of membrane cleaning and its impact on the water consumption will be discussed.
Overall, it will be highlighted that membrane processes will not only have an important role in the raw material separation in wood-based biorefineries as highly selective and energy-saving separation processes but they will be also important water loop from in-take water preparation to end-of-pipe treatment.
2017 Nov 172017 Nov 18

Event (Workshop)

Title2017 EU-China Workshop on the Research and Application of Membrane
Period2017/11/172017/11/18
LocationBlue Sky Hotel
CityWeihai
CountryChina
Degree of recognitionInternational event