... volume22222MGDADv¥¥==¥=¥=¥=¥=()()() 315 .5 BOD d 17 662 5 10 00 10 00,.¥=¥¥= 315 .5 lb BOD d ft lb BOD d 10 00 ft33 10 00 17 662 5 10 00 17 9,..lb FIGURE 18 .8 Cross-section of a rotating ... +º+ 1 nth0 269 356 7 10 2 500 10 00 10 003482 ,. MGD 15 9 mg L8.34 lb 1 gal lb d356.7 lb d numberunitlb d 10 00 ft2¥¥=¥=()()ft233, 000 gal d96,600 ft gal d ft22= 2 41. © ... efficiency:EXAMPLE 18 .1 Problem:The influent BOD is 247 mg/L and the plant effluent BODis 17 mg/L. What is the percent removal?Solution: 18 .3.2 UNIT PROCESS PERFORMANCE AND EFFICIENCYEquation 18 .1...