'''EN 12255 - Wastewater treatment plants''' refers to a set of [[European Committee for Standardization|European standards]] which specify the general requirements for structures and equipment that relate to [[Wastewater treatment|wastewater treatment plants]] for a total population of more than 50 PT (population total). This standard, however, does not include the design of a treatment processes itself.<ref>SIPE (Standards Information Portal for Europe) {{usurped|1=[https://web.archive.org/web/20150618001528/http://www.sipe-rtd.info/directive/wastewater-treatment-plants-part-1-general-construction-principles EN 12255-1:2002 - Wastewater treatment plants - Part 1: General construction principles]}}. Retrieved 17 June 2015.</ref> The standards consist of the following parts: <ref>European Committee for Standardization [http://standards.cen.eu/dyn/www/f?p=204:32:0::::FSP_ORG_ID,FSP_LANG_ID:7207,25&cs=108B869CE2E8414007ACACACECCA9CA93 CEN/TC 165/WG 41 - Small type sewage treatment plants (< 50 inhabitants)]{{Dead link|date=July 2025 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>
*[[EN 12255-1]]: Part 1: General construction principles *[[EN 12255-2]]: Part 2: Performance requirements of raw wastewater pumping installations *[[EN 12255-3]]: Part 3: Preliminary treatment *[[EN 12255-4]]: Part 4: Primary settlement *[[EN 12255-5]]: Part 5: Lagooning processes *[[EN 12255-6]]: Part 6: Activated sludge process *[[EN 12255-7]]: Part 7: Biological fixed-film reactors *[[EN 12255-8]]: Part 8: Sludge treatment and storage *[[EN 12255-9]]: Part 9: Odour control and ventilation *[[EN 12255-10]]: Part 10: Safety principles *[[EN 12255-11]]: Part 11: General data required *[[EN 12255-12]]: Part 12: Control and automation *[[EN 12255-13]]: Part 13: Chemical treatment - Treatment of wastewater by precipitation/flocculation *[[EN 12255-14]]: Part 14: Disinfection *[[EN 12255-15]]: Part 15: Measurement of the oxygen transfer in clean water in aeration tanks of activated sludge plants *[[EN 12255-16]]: Part 16: Physical (mechanical) filtration
== See also == *[[List of EN standards]] *[[European Committee for Standardization]]
==External links== *[http://www.cen.eu/ European Committee for Standardization]
==References== {{reflist}} {{List of EN standards|state=autocollapse}} [[Category:EN standards|#12255]] [[Category:Sewerage]]