With an investment of 60 million euros aimed at producing 30% more green energy from its largest wastewater treatment works, Severn Trent Water’s upgrade of its 12 anaerobic digesters has put people and pumps to a stern test.
Severn Trent, one of the largest water and wastewater companies in England and Wales, had experience in advanced digestion of sludges, but conversion of its conventional digesters to a new thermal hydrolysis process involved a difficult transition phase requiring a specialist pump selection.
The Minworth Sewage Treatment Works (280 mgd design, 120 mgd average) serves a population equivalent of 2.5 million in the
