Design Optimization for Activated Sludge and Extended Aeration Plants
385
NOMENCLATURE
a
Mass of biological solids produced during cell synthesis, per unit of substrate
removed.
b
Cell auto-oxidation rate per day based on the mixed liquor volatile suspended
solids in the aeration chamber,
kb
Cell auto-oxidation rate per day based on the degradable mixed liquor volatile
suspended solids,
f
Degradable fraction of the influent volatile suspended solids.
MLVSS,Xv Mixed liquor volatile suspended solids.
F/M
Organic loading or food-to-microorganism ratio for activated sludge expressed
as lb BOD per day per lb degradable VSS.
S r
Substrate removed.
x
Bio-degradable fraction of volatile suspended solids.
X 0
Influent volatile suspended solids.
X a
Volatile suspended solids in the aeration chamber.
X(j
Degradable mixed liquor volatile suspended solids.
REFERENCES
1. ECKENFELDER, W.W., Jr. and O'CONNOR, D.J., "Biological Waste Treatment", Pergamon Press,
Oxford, 1961.
2. VON DER EMDE, W., "Advances in Biological Waste Treatment", Editors, Eckenfelder, W.W., Jr.
and McCabe, B.J., Pergamon Press, Oxford, 1963.
3. KOUNTZ, R.R. and FORNEY, Charles, Jr., "Metabolic Energy Balances in a Total Oxidation
Activated Sludge System", Sewage and Industrial Wastes, Vol. 31, No. 7, pp. 819-826 (July 1959).
4. ECKHOFF, David W. and JENKINS, David, "Activated Sludge Systems - Kinetics of the Steady
States". Sanitary Engineering Research Laboratory, University of California, Berkeley (December
1967).
5. WEDDLE, Clark L. and JENKINS, David, "The ViabiUty and Activity of Activated Sludge", Water
Research, Vol. 5, No. 8, (August 1971).
6. WUHRMANN, K., "Research Developments in Regard to Concept and Base Values of the
Activated Sludge System", Advances in Water Quality Improvement, Vol. 1 (Edited by Gloyna,
E.F. and Eckenfelder, W.W., Jr.), University of Texas Press, Austin and London.
7. ECKENFELDER, W.W., Jr. and FORD, D.L., "Water Pollution Control", Pemberton Press, Austin,
Texas 1970.
8. SCHMIDT, R.K., "Parameter Responses for Influent Suspended Solids in the Activated Sludge
Treatment Process", Ph.D. Thesis, University of Texas, Austin, Texas (1970).
385
NOMENCLATURE
a
Mass of biological solids produced during cell synthesis, per unit of substrate
removed.
b
Cell auto-oxidation rate per day based on the mixed liquor volatile suspended
solids in the aeration chamber,
kb
Cell auto-oxidation rate per day based on the degradable mixed liquor volatile
suspended solids,
f
Degradable fraction of the influent volatile suspended solids.
MLVSS,Xv Mixed liquor volatile suspended solids.
F/M
Organic loading or food-to-microorganism ratio for activated sludge expressed
as lb BOD per day per lb degradable VSS.
S r
Substrate removed.
x
Bio-degradable fraction of volatile suspended solids.
X 0
Influent volatile suspended solids.
X a
Volatile suspended solids in the aeration chamber.
X(j
Degradable mixed liquor volatile suspended solids.
REFERENCES
1. ECKENFELDER, W.W., Jr. and O'CONNOR, D.J., "Biological Waste Treatment", Pergamon Press,
Oxford, 1961.
2. VON DER EMDE, W., "Advances in Biological Waste Treatment", Editors, Eckenfelder, W.W., Jr.
and McCabe, B.J., Pergamon Press, Oxford, 1963.
3. KOUNTZ, R.R. and FORNEY, Charles, Jr., "Metabolic Energy Balances in a Total Oxidation
Activated Sludge System", Sewage and Industrial Wastes, Vol. 31, No. 7, pp. 819-826 (July 1959).
4. ECKHOFF, David W. and JENKINS, David, "Activated Sludge Systems - Kinetics of the Steady
States". Sanitary Engineering Research Laboratory, University of California, Berkeley (December
1967).
5. WEDDLE, Clark L. and JENKINS, David, "The ViabiUty and Activity of Activated Sludge", Water
Research, Vol. 5, No. 8, (August 1971).
6. WUHRMANN, K., "Research Developments in Regard to Concept and Base Values of the
Activated Sludge System", Advances in Water Quality Improvement, Vol. 1 (Edited by Gloyna,
E.F. and Eckenfelder, W.W., Jr.), University of Texas Press, Austin and London.
7. ECKENFELDER, W.W., Jr. and FORD, D.L., "Water Pollution Control", Pemberton Press, Austin,
Texas 1970.
8. SCHMIDT, R.K., "Parameter Responses for Influent Suspended Solids in the Activated Sludge
Treatment Process", Ph.D. Thesis, University of Texas, Austin, Texas (1970).