*7.3. Bioethanol*

A few examples of wastewater and wastewater sludge use for bioethanol production have been published. Finland's VTT Technical Research Center has developed technology for distributed ethanol production by fermentation of food processing wastewater. This technology allows production even on a small scale and is estimated to be capable of meeting 2% of the total volume of petrol sold in Finland, and is currently being marketed by St1 Biofuels Oy [38,48].
