Yen so Commune, Hanoi



Wastewater canal (mainly septic tank effluent with some
industrial wastewater and stormwater) with pumping
station to pump the canal water into:



Wastewater-fed fish pond



Wastewater-fed fish on sale in local market



Vegetable production on fishpond embankment



Aquatic vegetable production with fishpond effluent

Photographs © Duncan Mara 2004-05

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