Cost R elationship of Biological and Thermal Processes
545
SUMMARY
Specific BOD reduction costs using selected treatment processes are compared taking
the wastewater from a typical plastics plant as an example.
Partial purification can be performed economically with the aid of a plastic trickling
filter. Extensive purification is best achieved by a combination of the plastic trickling
filter and activated sludge processes. The high-rate activated sludge process is to be
preferred where extremely high degrees of BOD reduction are required as compared with
the activated sludge process.
Incineration is recommended for wastewater concentrations greater than 30,000 to
50,000 mgBODs/1.
ACKNOWLEDGEMENTS
The author would like to express his appreciation to Farbwerke Hoechst AG for
providing the test data, and Friedrich Uhde GmbH for permitting the publication of this
paper.
SYMBOLS
BOD s concentration (mg/1)
Specific BOD 5 reduction costs (1/kg BOD s )
Plant capacity (kg BOD 5 /h)
Efficiency (%)
Overall efficiency
Trickling filter efficiency
Activated sludge process efficiency
REFERENCES
1 JAESCHKE, L. and TROBISCH, K., Halbtechnische biologische Abwasserbehandlung
kohlenstoffhaltiger Produktionsabwδsser; Chemie-Ing.-Techn. 38, 3, 366, (1966).
2 KLOCKNER, D. and ZAHN, R., Der Einfluί von Chlor auf das Belebungsverfahren. Chemiker
Zeitung 95, 479 (1971).
3 BRUCE, A.M. and MERKENS, J.C., Recent Studies of High-Rate Biological Filtration. J. Proc.
Inst. Sew. Purif., 2 (1970).
4 RINKE, G., Neuere Gesichtspunkte zur Abwasserreinigung mit Tropfkφrpern. Gwf. 108, 24, 667
(1967).
5 SALOMON, H., Die thermische Vernichtung hochbelasteter Produktionsabwδsser in der
chemischen Industrie. Mόnchner Beitrδge zur Abwasser-, Fischerei- und Fluίbiologie, Bd. 16,
Mόnchen, im Druck (1972).
C BOD s
C
F
V
Index o
Index
l
Index
2
545
SUMMARY
Specific BOD reduction costs using selected treatment processes are compared taking
the wastewater from a typical plastics plant as an example.
Partial purification can be performed economically with the aid of a plastic trickling
filter. Extensive purification is best achieved by a combination of the plastic trickling
filter and activated sludge processes. The high-rate activated sludge process is to be
preferred where extremely high degrees of BOD reduction are required as compared with
the activated sludge process.
Incineration is recommended for wastewater concentrations greater than 30,000 to
50,000 mgBODs/1.
ACKNOWLEDGEMENTS
The author would like to express his appreciation to Farbwerke Hoechst AG for
providing the test data, and Friedrich Uhde GmbH for permitting the publication of this
paper.
SYMBOLS
BOD s concentration (mg/1)
Specific BOD 5 reduction costs (1/kg BOD s )
Plant capacity (kg BOD 5 /h)
Efficiency (%)
Overall efficiency
Trickling filter efficiency
Activated sludge process efficiency
REFERENCES
1 JAESCHKE, L. and TROBISCH, K., Halbtechnische biologische Abwasserbehandlung
kohlenstoffhaltiger Produktionsabwδsser; Chemie-Ing.-Techn. 38, 3, 366, (1966).
2 KLOCKNER, D. and ZAHN, R., Der Einfluί von Chlor auf das Belebungsverfahren. Chemiker
Zeitung 95, 479 (1971).
3 BRUCE, A.M. and MERKENS, J.C., Recent Studies of High-Rate Biological Filtration. J. Proc.
Inst. Sew. Purif., 2 (1970).
4 RINKE, G., Neuere Gesichtspunkte zur Abwasserreinigung mit Tropfkφrpern. Gwf. 108, 24, 667
(1967).
5 SALOMON, H., Die thermische Vernichtung hochbelasteter Produktionsabwδsser in der
chemischen Industrie. Mόnchner Beitrδge zur Abwasser-, Fischerei- und Fluίbiologie, Bd. 16,
Mόnchen, im Druck (1972).
C BOD s
C
F
V
Index o
Index
l
Index
2