The Vijayawada Municipal Corporation has invited tenders from companies that can generate energy from the garbage. As many as 6 companies made presentations at the VMC office here on Saturday. The companies that evinced interest include: IL &FS Environmental Infrastructure and Services Ltd. (New Delhi), Renew GEN Enviro Ventures India Pvt Ltd. (Bangalore), Continental Energy Services Pvt., Ramky Enviro Engineers Pvt. Ltd, and Pace Power System Pvt. Ltd. and M/s Pyromex, Sultante of Oman (all from Hyderabad).