10/22/2013AP - Laserfiche WebLink

Home Browse Search

These values are reasonably similar. The field data will be used in the following analysis regarding design loads and projected reductions.To complete this review,the flows and water quality associated with the RO Concentrate,which is to be blended at an average ratio of 10:1 with flows from the South Relief Canal, needs to be included. The RO Concentrate is a highly mineralized, low suspended solids flow with a near neutral pH, and water temperatures consistently at about 26° C. The flow rate is presently about 1 MGD. Based upon data collected during the ongoing pilot investigation,the design water quality for the RO Concentrate is as noted in Table 4. Table 4: Desist►Concentrations Ro Concentrate,South Relief Canal and 10:1 Blend Units RO Concentrate Canal Value 10:1 Design Value Average Blend Annual Average Value Average Total P m L 0.033 0.240 0.221 Total N m L 1.57 1.05 1.10 Ammonia-N m /L 0.94 0.09 0.17 TSS m L <2 11 10 Alkalinity g/L a 723 178 228 Conductive micros/cm 6,135 1,941 2,322 Color pcu 11 39 36 * Value is typically directly related to concentration in feed water **Typically directly related to water temperature Accordingly, based upon flows of 10 MGD from the canal and I MGD as RO Concentrate, the annual design loads to the Algal Turf Scrubber®(ATSTM)treatment unit shall be as noted in Table 5. To determine the reduction associated with these loads through the Algal Turf Scrubber®, a first order model —ATSDEM—which is based upon the Monod relationship. ATSDEM was developed by HydroMentia, Inc. of Ocala, Florida6, and will be applied to the water quality and flow conditions. The model is based upon projections of specific growth rates and community productivity for the Algal Turf Community, which has been shown to be a function of total phosphorus levels; hydraulic loading rate;temperature; tissue nutrient levels and average standing crop.Critical input parameters are noted in Table 6. Table 5: Design Pollutant Loads from 11 MGD Design Flow Blend Units 10:1 Design Design Pollutant Loads Blend Annual Value Total P lb/year 7,400 Total N lb/year 36,834 TSS lb/year 334,851 Table 6:Critical Input Parameters ATSDEM 6 This model was developed as part of the Contact C-13933 between HydroMentia, Inc and the South Florida Water Management District. "S-154 Pilot Single Stage Algal Turf Scrubber® Final Report" Submitted to the South Florida Water Management District.March 2005. DEP Agreement No.G0353,Attachment A-1,Page 11 of 14 143