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There is an urgent need to develop and improve low cost
technologies for wastewater treatment. Simultaneously treating
wastewater and producing duckweed in a pond system is, therefore,
an attractive solution contributing to both environmental
protection and food production. Duckweed has excellent qualities: a
high protein content, a high growth rate and is an easy crop to
handle. The small plant turns nitrogen from wastewater into a food
source. This thesis reports on the effect of different operational
variables, like anaerobic pre-treatment, the combination of algae
and duckweed ponds and pond depth. Improved nitrogen removal was
obtained through the combination of duckweed ponds with algae
ponds. Duckweed pond systems could be designed with shallow depth
without affecting nitrogen removal efficiency. This research is the
result of the cooperative effort between the EIDENAR, Univalle,
Cali, Colombia and the UNESCO-IHE Institute for Water Education in
Delft, the Netherlands.
There is an urgent need to develop and improve low cost
technologies for wastewater treatment. Simultaneously treating
wastewater and producing duckweed in a pond system is, therefore,
an attractive solution contributing to both environmental
protection and food production. Duckweed has excellent qualities: a
high protein content, a high growth rate and is an easy crop to
handle. The small plant turns nitrogen from wastewater into a food
source. This thesis reports on the effect of different operational
variables, like anaerobic pre-treatment, the combination of algae
and duckweed ponds and pond depth. Improved nitrogen removal was
obtained through the combination of duckweed ponds with algae
ponds. Duckweed pond systems could be designed with shallow depth
without affecting nitrogen removal efficiency. This research is the
result of the cooperative effort between the EIDENAR, Univalle,
Cali, Colombia and the UNESCO-IHE Institute for Water Education in
Delft, the Netherlands.
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