Small wastewater treatment plants
Small wastewater treatment systems serve to purify domestic foul water from buildings with up to 50 inhabitants. The wastewater is treated using physical and biological processes.
Regulatory framework
Small wastewater treatment plants that are covered by harmonised standards EN 12566-3 and EN 12566-6 must bear the CE marking.
For small wastewater treatment plants in accordance with EN12566-3 and EN12566-6, national technical approvals were granted until October 2016. As a result of the implementation of the judgement of the European Court of Justice of 16 October 2014 in case C-100/13, national technical approvals are no longer granted for these products if they bear the CE marking on the basis of the Construction Products Regulation (Regulation (EU) No 305/2011). The products may not be marked with the national conformity mark.
Small wastewater treatment plants and systems not covered by the harmonised European standards (e.g. retrofit kits) fall under the Ordinance on the determination of the suitability of construction products and construction techniques under water law by means of verifications in accordance with the Building Codes of the federal states (WasBauPVO).
Cf. WasBauPVO, Section 1(1)(a) 'Small wastewater treatment plants designed for wastewater volumes of up to 8 m3/day'.
DIBt grants national technical approvals (abZ) in combination with a general construction technique permit (aBG) for the latter. The abZ/aBG serve to verify the suitability of the plants both from a construction and water legislation point of view. (Please also see Retrofit kits for installation in existing wastewater treatment plants for creation of small wastewater treatment plants).
National procedure
To prepare an abZ/aBG for your construction product, we need an application from you. We recommend that you contact us prior to doing so. Feel free to send us your enquiry informally via email to dibt(at)dibt(.)de or to the competent technical contact listed in the top right.
For a first assessment, please send us the following information:
- Description of the construction product and its intended field of use
- e.g. material, configuration, number of sizes, variants, dimensions
- e.g. use in walls, ceilings, interior construction, building services
- Description of the construction technique and its field of application
- e.g. design of walls, ceilings, elements, etc., and interaction of components
- e.g. application in foundation engineering, reinforced concrete construction, building insulation; as load-bearing or non-load-bearing component; under static and quasi-static loading; fire exposure; other environmental exposures
- Information regarding impact on regulatory concerns
- in particular structural integrity, fire protection, health and environment protection, sound insulation as well as thermal performance
- Explanation of need for an abZ/aBG
- Do you significantly deviate from the Technical Building Rules?
- Or do neither Technical Building Rules nor generally recognised technical rules exist?
- Contact details
- preferably email address and/or telephone number, as well as name, organisation/company, and postal address
We will then contact you to clarify the next steps.
If you already hold a DIBt approval and/or construction technique permit and wish to apply for an amendment, supplement, or renewal, please use the form provided below.
- pdf-Datei Application for amendment / supplementation / renewal of a national technical approval and/or construction technique permit (4 pages ) Last updated: 10 April 2024; Application form
| Subject concerned | Applicant | Decision no. |
Validity
from / to |
|---|---|---|---|
| Kleinkläranlagen mit Abwasserbelüftung zur Freiaufstellung Belebungsanlagen mit Membranfiltration, Typ BUSSE MF - HKA und Typ BUSSE MF - G-HKA für 4 bis 50 EW Ablaufklasse D+H | BUSSE GmbH Zaucheweg 6 04316 Leipzig | Z-55.3-317 |
Z:
17.04.2025 G: 15.04.2030 |
| Kleinkläranlagen mit Abwasserbelüftung zur Freiaufstellung Belebungsanlagen mit Membranfiltration Typ BUSSE MF - HKA und Typ BUSSE MF - G-HKA für 4 bis 50 EW Ablaufklasse D+H+P | BUSSE GmbH Zaucheweg 6 04316 Leipzig | Z-55.3-327 |
Z:
24.06.2025 G: 01.07.2030 |
| Kleinkläranlagen mit Abwasserbelüftung zur Freiaufstellung Belebungsanlagen mit Membranfiltration, Typ BUSSE MF - HKA und Typ BUSSE MF - G-HKA für 4 bis 50 EW Ablaufklasse N+H | BUSSE GmbH Zaucheweg 6 04316 Leipzig | Z-55.3-60 |
Z:
24.06.2025 G: 03.07.2030 |