10/22/2013AP - Laserfiche WebLink

Home Browse Search

CSuspended solids removal through the ATSTM has been typically been about 50% when influent TSS are less than 15 mg/L. Quite often laboratory data is reflected as<5 mg/L which is reported as the limit of detection. 50% reduction is a reasonable projection. Table 8: ATSDEM Performance Projections Pm..0/hr) 0.032 KS (ug/L) 50 Ksh(gPm/If) 11 Tot°C 30 Q 1.09 TP Areal TN Areal TP Removal TN Removal Algal Turf Net Influent Effluent removed Rate Influent Effluent removed Rate Productivity Effluent TP Ng/I TP Ng/I Ib g/m2-yr TN mg/I TN mg/I Ib g/m2-yr g/m2-day pH January 136 110 75 16 1 0.75 0.64 301 65 7.50 8.02 February 112 86 74 16 0.72 0.62 295 63 7.35 801 March 333 265 193 42 0.84 0.57 774 166 19.26 8.34 April 171 108 178 38 1.06 0.81 714 154 17.77 8.30 May 326 213 321 69 1.37 0.92 1,284 276 31.96 8.68 June 267 148 337 73 1.63 1.16 1,350 290 33.61 8.73 July 148 65 235 50 1.14 0.81 939 202 23.38 8.45 August 325 193 374 81 1.54 1.01 1,498 322 37.30 8.83 September 267 178 253 54 1.02 0.66 1,013 218 25.21 8.50 October 227 168 168 36 1.10 0.86 674 145 16.78 8.27 November 167 127 113 24 1.12 0.96 452 97 11.26 8.12 December 172 144 78 17 0.72 0.61 314 67 7.81 8.02 Avera es 225 1 151 45 1.12 0.82 182 21.04 8.39 Totals 2,402 9,607 Table 9: Comparison ATSDEM Performance Projections to Pilot Results January through April 2011 Areal Removal Rate Productivity g/m'`- pH Influent mg/L Effluent mg/L m-'- r da Pilot Pilot Pilot Pilot Pilot ATSDEM Data ATSDEM Data ATSDEM Data ATSDEM Data ATSDEM Data T 136 82 110 57 16 22 7.50 6.03 8.02 8.37 Jan T 0.75 0.64 0.64 0.49 65 170 T 112 80 86 45 16 28 7.35 14.32 8.01 8.54 Feb T 0.72 0.66 0.62 0.42 1 65 208 T 333 257 265 45 42 165 19.26 20.98 8.34 8.35 Mar T 0.84 1.28 0.57 0.56 166 589 T 171 99 108 30 38 54 17.77 23.28 8.30 8.21 Apr T 0.81 1.13 0.81 0.66 154 369 In addition to the ATSTM,the proposed facility will include about 1 acre of polishing wetlands, intended to permit settling of periodically sloughed algae and some buffering of pH and water temperature, as well as providing wildlife habitat. The removal rates in terms of nutrients and solids through such a wetland/pond system is comparatively modest. At the Egret Marsh Stormwater Park, the ATSTM is followed by a wetlandlpond system, which over nine months has provided an average removal rate of 5 g/m2-yr for TP and 25 g/m2-yr for TN. These removals are reflected in the loading and load reduction table included as part of this application. A4 DEP Agreement No.G0353,Attachment A-1,Page 13 of 14 145