South Davis Nutrient Recovery

South Davis Nutrient Recovery
Resource Recovery | Wastewater Treatment

The South Davis Sewer District South Plant is upgrading because it has been 25 years since its last upgrade. In addition, new UPDES permit requirements exceeded its ability to treat for Ammonia and Phosphorus, and the Wasatch Resource Recovery project being constructed just to the north of the plant s going to discharge additional nutrients to the plant for further treatment. After a thorough study, the District decided to use the ClearAs Water Recovery process wherein 140 miles of 4 inch glass pipe in a 200 ft. X 450 ft. greenhouse will grow algae to recover the carbon, nitrogen, and phosphorus via microalgae which is in turn harvested, dewatered, dried, and sold. In addition to this, the facility is also upgrading its electrical / control / Telemetry system, adding a biosolids dewatering facility, upgrading its anaerobic digesters, adding an operations building, and upgrading its headworks.

Project Study:

Client	South Davis Sewer District
Reference	Dal Wayment, General Manager
Location	North Salt Lake, UT
Cost	$36.5 Million
Features	Design Construction Management Start-up & Commissioning Resulting wastewater devoid of TSS, BOD, and bacteria, suitable for Type I Reuse; Total nitrogen is less than 10mg/l and total phosphorus is less than 0.10mg/l. Continual algae production and harvesting, and can be sold for a variety of uses, such as livestock feed, fish feed, bio-diesel, succinic acid, and many other products where petroleum products are typically used.