TY - JOUR
T1 - On the use of residence time distributions for the design of clarifiers
AU - Silveston, P.L.
AU - Stepko, W.A.
AU - Sakata, N.
AU - Cordoba‐Molina, J.F.
AU - Rietema, K.
AU - Hudgins, R.R.
PY - 1979/2
Y1 - 1979/2
N2 - Use of residence time distributions (RTD's) for the design of clarifiers proposed by the senior author in 1969 and by others has been found to be based on flow pattern assumptions which are false. Since the residence time distribution depends upon the density of the feed to the clarifier, flow rate and other near‐intangibles, it is not possible to obtain RTD's which pertain to an operating settler from which reliable performance may be predicted. Finally, laboratory studies demonstrate that the combination of RTD's and quiescent settling data do not reliably predict clarifier performance.
AB - Use of residence time distributions (RTD's) for the design of clarifiers proposed by the senior author in 1969 and by others has been found to be based on flow pattern assumptions which are false. Since the residence time distribution depends upon the density of the feed to the clarifier, flow rate and other near‐intangibles, it is not possible to obtain RTD's which pertain to an operating settler from which reliable performance may be predicted. Finally, laboratory studies demonstrate that the combination of RTD's and quiescent settling data do not reliably predict clarifier performance.
UR - http://www.scopus.com/inward/record.url?scp=0018430998&partnerID=8YFLogxK
U2 - 10.1002/cjce.5450570113
DO - 10.1002/cjce.5450570113
M3 - Article
AN - SCOPUS:0018430998
SN - 0008-4034
VL - 57
SP - 83
EP - 87
JO - Canadian Journal of Chemical Engineering
JF - Canadian Journal of Chemical Engineering
IS - 1
ER -