I.S. EN 12255-4:2002
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
WASTEWATER TREATMENT PLANTS - PART 4: PRIMARY SETTLEMENT
Hardcopy , PDF
03-02-2023
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.
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
4.1 General
4.2 Planning
4.3 Process
4.3.1 General
4.3.2 Required Capacity
4.3.3 Upward Flow Tanks (including Imhoff Tanks)
4.3.4 Horizontal Flow Tanks
4.3.5 Lamella Separator
4.3.6 Sludge Collection and Removal
4.3.7 Scum Removal
4.4 Maintenance
4.5 Health and Safety
Bibliography
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