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prБДС EN 12255-7 rev:2022

Wastewater treatment plants - Part 7: Biological fixed-film reactors

General information

20.60     Dec 16, 2022

30.99    Apr 26, 2023



European Standard


This European Standard specifies the design principles and performance requirements for secondary treatment by biological fixed-film reactors at wastewater treatment plants for more than 50 PT.
The primary application is for wastewater treatment plants designed for the treatment of domestic and municipal wastewater.
Biological fixed film reactors include biological trickling filters, rotating biological contactors, submerged bed reactors and biofilters.
Differences in wastewater treatment throughout Europe have led to a variety of systems being developed. This standard gives fundamental informations about the systems; this standard has not attempted to specify all available systems.

Detailed information additional to that contained in this standard may be obtained by referring to the Bibliography.

Life cycle


БДС EN 12255-7:2004


prБДС EN 12255-7 rev:2022
20.60 Close of comment period
Dec 16, 2022

Related project

Adopted from prEN 12255-7 rev IDENTICAL