CHAPTER 10 WASTEWATER TREATMENT AND DISPOSAL
Review Question Page References
(1) 287 (15) 294 (29) 309
(2) 287 (16) 295 (30) 309
(3) 289 (17) 295 (31) 309
(4) 289 (18) 296 (32) 311
(5) 289 (19) 296 (33) 312
(6) 288 (20) 296 (34) 312
(7) 290 (21) 296 (35) 315
(8) 291 (22) 296 (36) 315
(9) 292 (23) 298 (37) 316
(10) 292 (24) 299 (38) 317
(11) – (25) 299 (39) 319
(12) 293 (26) 305 (40) 321
(13) 293 (27) 305 (41) 322
(14) 293 (28) 307 (42) 323 (57) www.envirosources.com
(55) www.mwra.com/sewer/htmi/sewditp.htm (56) www.epa.gov/npdes/pubs/finaI99.pdf
(43) 323
(44) 331
(45) 326
(46) 326
(47) 328
(48) 328
(49) 328
(50) 328
(51) 329
(52) 330
(53) 330
(54) 331
Solutions to Practice Problems
1. efficiency = 100 x (PIN-POUT)/PIN (Equation 10-1)
3. efficiency = 100 x (200 – 60)/200 = 70 percent
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10. SVI = (V x 1000)/MLSS = 450 x 1000/1800 = 250 (Equation 10-6)
12. perc rate = 120 min/6 in = 20 min/in
13. 50 min/25 mm = 120 s/mm
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15. S = (100W/8.34V) (Equation 10-7b)
16. S = 100 x M/V (Equation 10-7a)
17. primary sludge mass = E x TSS x Q (Equation 10-8a)
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