I.S. EN 12255-7:2002
Current
The latest, up-to-date edition.
WASTEWATER TREATMENT PLANTS - PART 7: BIOLOGICAL FIXED-FILM REACTORS
Hardcopy , PDF
English
01-01-2002
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
Dates of withdrawal of national standards are available from NSAI.
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
4.1 General
4.1.1 Biological fixed film processes
4.1.2 Trickling filters
4.1.3 Rotating biological contactors
4.1.4 Submerged bed reactors and biofilters
4.2 Planning
4.3 Process
4.3.1 Design
4.3.2 Modes of operation
4.3.3 Selection of support media
4.3.4 Dimensions
4.3.5 Flow distribution
4.3.6 Oxygen supply
4.3.7 Clarification and solid separation
4.3.8 Additional considerations
4.4 Detailed design
4.4.1 Structures
4.4.2 Mechanical and electrical equipment
Bibliography
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