SCH Number 2005081013

Project Info

Title

City of Madera Wastewater Treatment Plant Expansion

Description

The main purpose of the proposed project is to expand the City of Madera Wastewater Treatment Plant (WWTP) from an existing permitted treatment capacity of 7.0 million gallons per day (mgd) to 10.1 mgd. This expansion will accommodate the City's projected growth for approximately the next 20 years. The current WWTP consists of a biological secondary treatment process comprised of headworks, primary clarification, biofiltration, secondary clarification, sludge digestion, sludge drying and effluent reclamation. Disinfection treatment is currently not practiced or required at the WWTP. Effluent from the WWTP is discharged to 14 evaporation-percolation ponds located within the facility boundary where most of the wastewater percolates into the underlying groundwater body. Each of the ponds comprises 20 acres and is approximately five feet deep. The WWTP uses approximately six of the ponds at one time for percolation with the remaining ponds leased to a farmer for growing crops for non-human consumption (primarily corn or wheat). Wastewater effluent is used to irrigate the crops via surface irrigation. A sludge centrifuge is currently in service. The dewatered sludge is hauled off-site for final disposal.

2 documents in project