The Sioux City wastewater treatment plant is making strides toward becoming a more sustainable operation. The facility is now turning wastewater into a renewable natural gas through a new pipeline facility. The project cuts greenhouse gas emissions by 23,000 tons a year, while also improving odor control in the area, and replacing 1.5 million gallons of diesel fuel per year. “The wastewater plant has always had enter anaerobic digestion, which is the last steps in the treatment process and that breaks down slug further and in that last process, it has always produced gas and it’s a waste gas that has just been flared. But now we are going to use that waste gas and we are going to turn it into something that is a renewable fuel,” said Randy Kenyon, of Bartlett & West. More >>