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| Publication: |
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Operation of Municipal Wastewater Treatment Plants
Manual of Practice-MOP 11 Sixth Edition
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| Medium: |
| Download Chapter |
| Pages |
| 67 |
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Water Environment Federation (WEF) |
| Year: |
| 2007 |
| Order No: |
| MOP1121 |
| DOI: |
| 10.2175/1-57278-232-3-21 |
Table of Contents
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Index
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Cover Art
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Frontmatter
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| Order Additional Chapters of MOP 11 |
Order a Hard Copy of MOP 11
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Abstract:
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Tricking filters, biotowers, and the rotating biological contactor (RBC) process are generally known as fixed-film treatment processes. Of these three processes, the trickling filter process predates the use of biotowers, RBCs, and the use of combined fixed-film and suspended growth processes (FF/SG).
New types of filter media are now used; therefore, rock media systems are labeled trickling filters, and plastic media systems are labeled biotowers. The trickling filter process is being incorporated to wastewater facilities using new methods or process modes, and many rock filters are being refurbished for continued use. This chapter aids both operators and engineers in grasping the operations and maintenance requirements of trickling filters as they are being applied to existing and new systems.
This chapter discusses many of the changes that occurred in both design and operation of RBCs. It includes discussions of predicting operating problems or plant overload and emphasizes methods of upgrading or improving the operation of RBCs.
Combined processes, that is, the coupling of trickling filters or RBCs (fixed-film reactors) with suspended growth (activated sludge) processes, now number several hundred in the U.S. The recent surge in combining both fixed-film and suspended growth (FF/SG) processes results from attempts to take advantage of the strengths and to minimize the weaknesses of each process. For example, combined trickling filter and activated-sludge processes have helped eliminate shock loads to the more sensitive activated-sludge process while sometimes providing a more highly polished effluent than achievable with the use of trickling filters alone. The coupling of biological processes has solved many past problems, but has also confronted the operators with new control criteria or concerns. This chapter addresses O&M concerns associated with the coupling or combining of biological processes.
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| Member Price: $27.00 |
| List Price: $36.00 |
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©2000 Water Environment Federation