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<br /> <br /> <br />Table 4-2 Bioreactor Treatability Study Design Parameters <br />Parameter Reactor 1 Reactor 2 Reactor 3 <br />Ratio of Molasses Feed (in terms of TOC) to <br />Sulfate (Ib TOC : 16 SO,)' 1:2 1:4 1:6 <br />Hydraulic Feed Rate, L/Day 2 2 2 <br />Tazget pH 6.8 6.8 6.8 <br />Effluent Recycle Rate (% of Influent Flow Rate) 150% 150% I50% <br />Hydraulic Retention Time, hours 24 24 24 <br /> <br />Column Study Sulfate Loading (16/day)** 0.003 <br />Column Study Molasses Feed Requirements (lb <br />TOC/day) I.SOE-03 7.50E-04 5.00E-04 <br />Column Study Molasses Feed Requirements (Ib <br />molasses/day)' 0.006 0.003 0.002 <br /> <br />Target Design Sulfate Feed Requirements <br />(lb/day)*** 3000 <br />Actual Desist Molasses Feed Requremenss (lb <br />TOC/day) 1500 750 500 <br />Acmal Desigrt Molasses Feed Requirements (Ib <br />molasses/day)* 6000 3000 2000 <br /> <br />Target Sulfate Loading per cu-ft of media 300-400 Ib SO,/cu-ft media <br />Tazget Cazbon Loading per cu-ft media 100-2001b C/cu-ft media <br />* approx. 4 Ib molasses equivalent to 1 Ib TOC <br />'* based on influent sulfate concentration of 663 <br />'*' based on influent sulfate concentration of 1000 mg/L and flow of 250 gpm <br />Bnltle MOUnlain Resources, /nc. <br />pa1001671reportslmarchrprlrrl6wtrmng~march.doc 53 <br />Mnrch 12. l999 <br />