Abstract
In order for water and wastewater treatment plants to operate effectively, it is necessary to remove or reduce early in the treatment process large suspended solid material that might interfere with operations or damage equipment. Removal of solids may be accomplished through the use of various size screens placed in the flow channel. Any material removed may then be ground to a smaller size and returned to the process stream or disposed of in an appropriate manner such as burying or incineration. An alternative to actual removal of the solids by screening is to reduce the size of the solids by grinding them while still in the waste stream; this grinding process is called comminution (1–8). Coarse screens (bar racks) and comminutors are usually located at the very beginning of a treatment process, immediately preceding the grit chambers (Fig. 1). To ensure continuous operation in a flow process, it is desirable to have the screens or comminutors installed in parallel in the event of a breakdown or to provide for overhaul of a unit. With this arrangement, flow is primarily through the comminutor and diverted to the coarse (bar) screens only when necessary to shut down the comminutor. Fine screens are usually placed after the coarse (bar) screens.
Keywords
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
WPCF, Operation of Municipal Wastewater Treatment Plants, Water Pollution Control Federation, Washington, DC, WPCF Operations and Maintenance Subcommittee, Vol. 11, pp. 444–451 (1990).
WEF, Design of Municipal Wastewater Treatment Plants, Water Environment Federation, Washington, DC, WEF Manual of Practice No.8, pp. 390–405 (1992).
D. H. F. Liu and B. G. Liptak, Wastewater Treatment, Lewis Publishers, Boca Raton, FL, pp. 136–139 (2000).
WPCF and ASCE, Sewage Treatment Plant Design, WPCF Manual of Practice No. 8, 1959, 1961, 1967, 1968, Water Pollution Control Federation, Washington, DC, American Society of Civil Engineers, New York, NY (1968).
G. M. Fair, J. C. Geyer, and D. A. Okun, Water Purification and Wastewater Treatment and Disposal: Water and Wastewater Engineering, Vol. 2, Wiley, New York, NY (1968).
B. L. Goodman, Design Handbook of Wastewater Systems: Domestic, Industrial, and Commercial, Technomic, Westport, CT (1971).
Metcalf and Eddy, Inc., Wastewater Engineering: Co1lection, Treatment, and Disposal, McGraw-Hill, New York, NY (1972).
Great Lakes-Upper Mississippi River Board of State Sanitary Engineers, Recommended Standards for Sewage Works (Ten States Standards), Health Education Service, Albany, NY (2002).
US Army, Engineering and Design—Design of Wastewater Treatment Facilities Major Systems, Engineering Manual No. 1110-2-501. US Army, Washington, DC (1978).
Editor, Comminution, Brainy Dictionary, http://www.brainydictionary.com/words/co/comminution145997.html (2003).
K. S. Kawatra, Comminution practices, Society of Mechanical Engineering, http://www.min-eng.com/commin_store.html (1997).
H. Cho and L. G. Austin, An equation for the breakage of particles under impact, Power Technology, 132,No. 2 (2003).
T. W. Chenje, D. J. Simbi, and E. Navara, The role of corrosive wear during laboratory milling, Minerals Engineering, 16,No. 7 (2003).
Editor, A quantification of the benefits of high pressure rolls crushing in an operating environment, Minerals Engineering, 16,No. 9 (2003).
Labosky, L., Stormwater management—catch basin. Environmental Protection, 15,No. 5, pp. 26 (2004).
C. Yapijakis, R. L. Trotta, C. C. Chang, and L. K. Wang. Stormwater management and treatment. In: Handbook of Industrial and Hazardous Wastes Treatment (L. K. Wang, Y. T. Hung, H. H. Lo, and C. Yapijakis, eds.). Marcel Dekker, Inc., NY, NY. pp. 873–921 (2004).
L. K. Wang, Y. T. Hung, and N. K. Shammas (eds.), Advanced Physicochemical Treatment Process. Humana Press, Totowa, NJ (2005).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2005 Humana Press Inc., Totowa, NJ
About this chapter
Cite this chapter
Deluise, F., Wang, L.K., Chang, SY., Hung, YT. (2005). Screening and Comminution. In: Wang, L.K., Hung, YT., Shammas, N.K. (eds) Physicochemical Treatment Processes. Handbook of Environmental Engineering, vol 3. Humana Press. https://doi.org/10.1385/1-59259-820-x:001
Download citation
DOI: https://doi.org/10.1385/1-59259-820-x:001
Publisher Name: Humana Press
Print ISBN: 978-1-58829-165-3
Online ISBN: 978-1-59259-820-5
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)