The Quest to Cost Effectively Meet Recycled Water Standards with Preozonation and Biologically Active Filtration
نویسندگان
چکیده
The latest NPDES permit adopted for the Sacramento Regional Wastewater Treatment Plant included a requirement for tertiary treatment, equivalent to the water quality requirements of Title 22, unrestricted use recycled water. Initial cost projections for the required plant upgrades exceeded $2 billion to upgrade the 691 ML/day (181 mgd) facility. To help in the selection process for tertiary treatment alternatives, a demonstration scale study was undertaken. A 0.95 ML/Day (0.25 mgd) BNR process was constructed to feed three filtration and three disinfection processes operated in parallel. Filtration alternatives tested were granular media, conventional and biologically active, and membrane. Disinfection alternatives were chlorine, ozone, and UV. Objectives of the demonstration scale study were determination of performance of and life cycle costs for each process alternative. The performance and costs for each process alternative will be reported in the presentation, along with trace organic compound removal performance for 12 tested compounds.
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