Page 222 - Fundamentals of Water Treatment Unit Processes : Physical, Chemical, and Biological

Flotation 177

P(saturator) (kPa) 1141 665 507 427 380 348 325 308 295 284 276 268 262 257 253 249 242 237 P(saturator)

P(saturator) i.e., leaving air air C(saturator) ¼ f H(air)

(f) efficiency, dissolved of flow
0.70 0.70 0.70 0.70 0.70 0.70 0.70 0.70 0.70 0.70 0.70 0.70 0.70 0.70 0.70 0.70 0.70 0.70 C o )
f saturator of flow saturator)=(mass saturator)

Inputs r[C(saturator) C a ] (C a (1 þ r) the is f (mass into the
Row water) is air the recycle

Second C(saturator) air=m 3 0.19 0.11 0.09 0.07 0.06 0.06 0.06 0.05 0.05 0.05 0.05 0.05 0.04 0.04 0.04 0.04 0.04 0.04 ¼ C(saturator) dissolved concentration leaving saturator the R
C(saturator) (kg C r in flow,

of
Calculation k 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 k ¼ C a C o

(e)

ratio, value
r 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.90 1.00 r ¼ R=Q an
the is assumed
is recycle i.e., and
r

P(saturator) (kPa) 798 470 361 307 274 252 236 225 216 208 202 197 193 190 186 184 179 176

P(saturator) C o ) efficiency, C(saturator) ¼ f H(air) P(saturator)

(f) (1 þ r) saturator

f 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 r[C(saturator) C a ] (C a the is f i.e.,

Inputs water) ¼ C r the is air saturator the R flow, recycle
Row C(saturator) 0.175 0.103 0.079 0.067 0.060 0.055 0.052 0.049 0.047 0.046 0.044 0.043 0.042 0.042 0.041 0.040 0.039 0.038 C(saturator) dissolved concentration the

First air=m 3 leaving in
C(saturator) (kg

of
Calculation K 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 k ¼ C a C o

(e)
ratio, r ¼ R=Q,
the an is assumed
0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.90 1.00 is recycle value
r r i.e., and