![Once everything useful has been teased out of the biomass, water gets squeezed out of what remains in this accordion-like filter press. The solids fall to a conveyor below, nudged by workers like Drew Christensen, and are burned to produce biogas.](https://will.illinois.edu/images/uploads/47338/121917_am_cellulosic_drewchristensen_0__medium.jpg)
Cellulosic Ethanol Push Stalls In The Midwest Amid Financial, Technical Challenges
Advanced biofuels have been touted as the next step beyond the corn-based ethanol that’s the bulk of the country’s renewable fuel for cars and trucks. These next-generation options were supposed to bring jobs to rural communities and provide farmers with fresh revenue sources, in addition to reducing the carbon footprint of vehicles.