The head of Swedish Biogas International said Aug. 9 that the company plans to spend another $2 million to $3 million to build a co-digestor at the plant that can use both human waste and food ...

Biogas plant at City of Glendale, Ariz., begins sending energy to APS customers Contacts APS Steven Gotfried, 602-250-3040 or City of Glendale Jennifer Stein, 623-930-2958 or Sexton Michael ...