Baseline wastewater quality information was collected on a monthly basis for three months after which duckweed ( Lemna minor) was introduced into the maturation ponds to at least 50% pond surface cover. The final effluent is used to irrigate gum plantations before finding its way into the nearest streams. The two centers, like more than 70% of Zimbabwe’s small urban areas, relied on algae based ponds for domestic wastewater treatment. The study was carried out at Nemanwa and Gutu Growth Points both with a total population of 23 000. This was to be achieved through the development and facilitation of the use of duckweed based wastewater stabilizations ponds. The study hoped to contribute towards improved environmental management through improving the quality of effluent being discharged into natural waterways. Duckweed based wastewater stabilization ponds for wastewater treatment (a low cost technology for small urban areas in Zimbabwe)Ī three-year investigation into the potential use of duckweed based wastewater stabilizations ponds for wastewater treatment was carried out at two small urban areas in Zimbabwe.
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