Eichhornia crassipes Efficacy in Secondary Wastewater Treatment in the Western Highlands of Cameroon

Figure 9

Variation in nitrate content (means ± S.D) from the inflow to the outflows of the vegetated and control lagoons systems during the dry season (a) and the rainy season (b) (I: inflow; Al: outflow of anaerobic lagoon; FL 1: outflow of facultative lagoon 1; FL 2: outflow of facultative lagoon 2; ML: outflow of maturation lagoon).

(a)

(b)