The wastewater management system comprises several components.
The first treatment step is occurring in the individual
septic tanks receiving blackwater from residential or commercial
buildings in the serviced area. From there the wastewater enters
a partly separate collection system, which connects to a pumping
station equipped with an odour control unit. To minimise costs of
operation and to promote renewable energy the pumps are solar
powered. The wastewater is pumped to three elevated siphons
(located in the centre of the flower), which distribute the wastewater
in intervals to three vertical subsurface-flow wetlands (the
first petal of the flower, area: 2,300m2, depth: 0.70 m, gravel size:
Ø 10, 25 and 40mm (from top to bottom), planted the ornamental
flowers Canna and Heliconia).