Structured-sheet media helps meet strict nitrification standardsProblem: The City of Stockton, Calif., needed to upgrade its 55 mgd wastewater treatment plant to meet NPDES regulations for tertiary treatment. The goal was a reliable, economical technology that would achieve tertiary nitrification, especially during winter. Because of the plant’s location, seismic hazards had to be considered.Solution: After a comprehensive evaluation, nitrifying trickling filters were selected based on low energy consumption, process stability and operational simplicity. High-density structured-sheet media from Brentwood Industries proved cost-effective for achieving optimal nitrification. The media modules yield a high specific surface area and are built to a tight deflection
