WASTE MAN – Water and Sludge integrated Management in biomass power plants
The objective of the project WASTE-MAN is to propose a novel solution that integrates flue gas (FG) cleaning with handling polluted water from energy conversion of biomass/waste and the sludge from the municipal wastewater treatment.
The Knowledge Foundation
Vattenfall R&D, Mälarenergi, Eskilstuna energi och miljö, Ena energi
For biomass/waste fuelled power plants, stricter regulations require further reduction of the negative impacts on the environment caused by the released pollutants – such as organic compounds, acids and heavy metals – through FG, polluted water and solids. Meanwhile, stricter rules for sludge disposal and use also require new routes for management of the sludge from municipal wastewater treatment.
There is a strong need from the power and wastewater industries to find new solutions in order to reduce pollutant emissions, save operation costs and improve energy and nutrient recovery. It has been recognized that integrated processes can be more cost-effective and energy-efficient; however, current FG cleaning, polluted water treatment and sludge handling are still running in a separated way without considering the benefit from the cross-media effects.
There is lack of knowledge about the integration and optimization of FG cleaning, polluted water treatment and sludge handling as a whole. Meanwhile, process integration will change the distribution of contaminants, and sludge can bring in more pollutants. Whereas, the ability of the integrated system to reduce the pollutant emission and the potential benefits of process integration remain unclear.
Three tasks are planned concerning the research questions:
- Developing simulation models and characterizing the distribution of contaminants and nutrients,
- System integration and optimization; and
- Assessment of potential environmental and economic benefits.