Abstract

The proposal is concerned with the development and optimisation of a technology for the purification of contaminated water from biomass gasification, which also allows energy to be recovered from the tarry pollutants. Currently these are separated into a heavy fraction not soluble in water and recycled back to the gasifier (or used for peak load district heating) and a light fraction, soluble in water, which needs treatment. The treatment technology is based on super critical wet oxidation/gasification (SCWO/G). The R&D activities proposed include experimentation at laboratory scale and pilot scale and mathematical modelling, both supporting evaluations for full scale (technological/economical/environmental) implementation.

The specific objectives are:

• to characterise the chemical composition of waste water from updraft gasification,
• to apply and optimise SCWO/G of such waste water at laboratory and pilot scale,
• to formulate kinetic and transport models for the SCWO/G process including simulation validation,
• to provide a chemical characterisation of the effluent water from the SCWO/G process,
• to extend these results to other gasifier configurations and other cleaning technologies based on literature information,
• to provide a full scale evaluation of the SCWO/G process for both the technical (energetic and environmental) and the economic aspects.

Contacts

Coordinator

• Bjorn TEISLEV / Babcock and Wilcox Volund AS Research and Development Centre / DENMARK

Participant

• Rainer MUCHA / Federal Research Centre for Forestry and Forest Products / GERMANY
• Ole KRISTENSEN / Kommunekemi AS DENMARK
• Colomba DI BLASI / Universita di Napoli Dipartimento di Ingegneria Chimica / ITALY