Three firms submit bids for implementation of Pirana STP project in Gujarat July 18, 2024 | Key Segments, Municipal Wastewater, Project Bidders, Project Updates, Tenders, Wastewater A total of three firms have submitted bids for construction of a 424 million litres per day (mld) Pirana Sewage Treatment Plant (STP) in Ahmedabad, Gujarat. This content is restricted.