12 channels of 12 meters and 3 channels of 35 meters length with a section of 0.74 x 0.47 m. The circulating water comes from the central tank fed by treated water from the effluent of a wastewater treatment plant. The range of input flow rate of the 12 meters long channels is 0.02 to 0.2 L/s and 2 to 50 l/s for 35 m long channels.
Inlet discharge in the 12 m channels is automatically set from a control panel installed in the laboratory. The flowmeters are connected to a backvalve that allows to precisely adjust the inlet flow. The panel shows the instantaneous inlet and outlet flows of each channels as well as the total volume circulated by unit time.
Physico-chemical variables of the circulating water*:
NH4+ (mg N/L): 1.0 ± 0.3
NO3– (mg N/L): 3.3 ± 0.3
NO2– (mg N/L): 0.1 ± 0.03
PO4+ (mg P/L): 0.7 ± 0.4
DIN:P (molar): 26 ± 17
Conductivity (µS/cm): 1704 ± 3
Oxygen (mg/L): 5.9 ± 0.1
(*) Data measured in June 2020, corresponding to the mean ± standard error of the water entering to the 12 m long channels.
There are 4 units of stainless steel of 4.5 x 1.8 x 0.4 m divided into three compartments of 1.5 x 1.8 m each, resulting in a total of 12 experimental wetlands. The supplying water of the wetlands is obtained from a central tank fed with treated water from the effluent of a wastewater treatment plant.
On-going research at URL
METERS OF CHANNEL
CUBIC METERS OF WATER