Deputy mayor of Prague visited WIDER UPTAKE test site
The deputy mayor, Mr. Petr Hlubucek, who is responsible for environmental issues in the Council of the City of Prague, visited the installation of irrigation boxes on the premises of Central Prague WWTP, located on Cisarsky island on the Vltava River.
The new water line (NWL) of the Central Prague WWTP is located on a Vltava river island in the middle of the city's green area close to the Prague botanical garden, Prague ZOO and the biggest Prague recreational area – Stromovka Park. The NWL is located inside a concrete containment to protect the plant from floods. The roof of the concrete containment is designed as a green park area that fits well into the surrounding greenery. The NWL produces high-quality effluent which is suitable for reuse purposes. That is why the Wider Uptake pilot units were installed on the premises of the Central Prague WWTP.
Green roof of New Water Line of the Central Prague WWTP. Photo: SMP CZ a.s. Praha
The objective of the Wider Uptake project in Prague is to demonstrate safe use of treated effluent for irrigation purposes in grey-green solutions for urban development with reasonable water transportation expenses.
There are four separate boxes, each divided into three fields for growing typical greenery of urban parks, i.e., grass, various flowers and bushes. The boxes are irrigated by four different sources of water:
- Water from the Vltava River
- Final effluent from New Water Line of Prague Central WWTP
- Final effluent disinfected by UV lamp
- Final effluent treated by membrane ultrafiltration and UV lamp.
The irrigation boxes were assembled and equipped with water distribution system by PVS a.s. Prague. The technology for NWL effluent disinfection and membrane ultrafiltration was supplied and installed in a transport container by VWS MEMSEP s.r.o., a member of Veolia Group.
Transport container with NWL effluent treatment technology. Photo Martin Srb, PVK a.s.
Mr. Hlubucek was accompanied by general director of PVK a.s. Mr. Petr Mrkos, PVK is the company supplying drinking water and operating sewer system and WWTPs in Prague, and by general director of PVS a.s. Mr. Pavel Valek, PVS is the city asset management company and a partner in WIDER UPTAKE.
The main purpose of the visit was to demonstrate the WIDER UPTAKE project in general and the experiments with the “Prague Case” in particular. Mr. Hlubuček supported the idea of safe water reuse for irrigation of urban greenery and added that although the economy of the supply of recycled water is always important, the importance of the replacement of drinking water with reused water will play a much more important role in the near future when natural water resources might be limiting factor for the growth and life of large cities.
Test site for irrigation with waste water. Photo: Jiri Wanner