Page 194 - Fundamentals of Water Treatment Unit Processes : Physical, Chemical, and Biological

Grit Chambers 149

VSS (%) 48.4 40.0 50.0 9.5 43.6 20.0 11.6 1.0 23.0
Quality

Grit Moisture (%) 53.1 46.0 65.0 13.4 50.0 33.0 33.0

avg 9.4 15.0 18.3 29.9 6.0 22.4 41.1 22.4 25.4 38.9 7.5 26.2 2.9 15.7 4.7 78.6 13.8
Flow)

Grit=ML min 6.0 13.8 0.7 18.0 3.0 12.7 26.9 11.2 19.5 0.7 3.7 6.7 0.7 13.5 3.0 20.2 4.5

Quantity (L max 22.4 32.2 41.1 48.6 12.0 29.2 64.3 26.2 35.2 180.3 20.2 112.2 6.7 49.4 7.5 157.1 56.1 1959. York,

Grit avg 1.3 2.0 2.4 4.0 0.8 3.0 5.5 3.0 3.4 5.2 1.0 3.5 0.4 2.1 0.6 10.5 1.9 New

(ft 3 =mg) min 0.8 1.9 0.1 2.4 0.4 1.7 3.6 1.5 2.6 0.1 0.5 0.9 0.1 1.8 0.4 2.7 0.6 Engineers,

Civil
max 3.0 4.3 5.5 6.5 1.6 3.9 8.6 3.5 4.7 24.1 2.7 15.0 0.9 6.6 1.0 21.0 7.5 of
Society

Year 1950–1953 1950–1954 1939–1953 h
1953 1951 1954 1953 1954 1953 1953 1953 1954 1953 1954 1954 1954 1954 American
8,
(km 2 ) 8 17 383 16 16 285 19 18 12 49 No.
Area Served Practice

(mi 2 ) 3.1 6.7 148 6 6.2 110 7.4 7 4.5 19 of
Cities Manual

U.S. (m 3 =day) 19 10 73 1681 51 5 62 42 12 507 20 34 28 24 47 9 620 WPCF the

Selected Q(1954) (mgd) 163.8 and 36

in 5.1 2.7 19.4 444 13.6 1.4 16.5 11.1 3.1 134 5.2 9 7.3 6.3 12.3 2.3 No.
Chambers (ML=day) 53 21 68 1703 45 15 76 68 15 507 23 51 37 38 136 11 662 Practice

Grit Q(design) (mgd) Engineering
for 14 5.5 18 450 12 4 20 18 4.0 134 6.0 13.5 9.7 10 36 3 175.0 of pump.
Quality Percent Sewers Comb. 100 0 0 9 0 0 98 0 0 90 90 95 0 0 0 100 50 Manual ASCE conveyer. rake. return conveyer.

and washing. wastes. screw reciprocating organic spiral

7.9 Quantities CN a,b RI TX MI a MN d CT MI Metro WI c IA MN c WI c MI Huron, VA CT e (raw) FL f PA DC g,h ASCE-WPCF, grit spray cereal and by washing by washing by washing washer. by washing avg.
TABLE Grit City Bridgeport, Cranston, Dallas, Detroit, Duluth, Fairfield, Lansing, Madison, Marshalltown, Paul, Oshkosh, Port Portsmouth, Stamford, Tampa, -washed Uniontown, Washington, Source: a Water b Rubber c Grit d Grit e Grit f Grit g Grit h year 6