Vertical Air Conditioning and Wastewater Treatment System

Technological approaches to increase energy and resource efficiency in urban districts

The high population density in cities and the challenges posed by climate change place specific demands on urban infrastructure. Some requirements can be met through innovative technologies, such as a vertical air conditioning and wastewater treatment system.

Objectives and procedure
The overall objective of the project is to develop an innovative technological approach to increase urban energy, land and resource efficiency, local quality of life and climate protection. For this purpose, low-maintenance, multifunctional green façade elements using waste water and in combination with façade photovoltaics will be developed. These façade elements will meet a variety of requirements: relief for sewage networks and sewage treatment plants, improved buffer capacity in heavy rainfall events, increased cooling capacity of buildings, reduction of so-called heat islands, improved air quality and fine dust pollution and of course the production of electricity using photovoltaics.

Expected results and transfer
After a conception phase, concrete testing in selected urban districts is planned. After this trial phase, a prototype will be available for implementation. Knowledge transfer is ensured through scientific publications at national and international conferences.

Project title
VertiKKA – Vertical Air Conditioning and Wastewater Treatment Systemto increase resource efficiency and quality of life in urban districts

Project website


Funding code

2.105.789 €

Vera Middendorf
Björnsen Beratende Ingenieure GmbH
07152 331109-24

Project partners
Institut für Automation und Kommunikation e. V.
PI Photovoltaik-Institut Berlin AG
Stadtentwässerungsbetriebe Köln AöR
Bauhaus-Universität Weimar
Hochschule für Wirtschaft und Umwelt Nürtingen-Geislingen
Technische Universität Chemnitz

Version of
Mai 2019

Contributions at the kick-off event in June 2019