EFFECTS OF THE REUSE OF UNTREATED WATER FROM THE AVO’O RIVER (CAMEROON) CONTAMINATED BY FECAL SLUDGE FOR THE GROWTH OF Solanum nigrum L
The majority of faecal sludge in Yaounde is disposed of as uncontrolled discharge from Nomayos without treatment. This uncontrolled discharge is found beside the Avo’o river usually by farmers to irrigate market garden produce. This situation can cause the real risk of health. This paper focuses on the effect of various treatment combinations of water contaminated by faecal sludge on the growth, microbiological and parasitological characteristics of Solanum Nigrum L. Faecal streptococci, faecal coliforms and parasitic characteristics were determined in raw discharged sludge samples, Avo’o river water samples (S1, S2, S3), and Solanum nigrum L. by using standard protocols. The growth parameters of the Solanum nigrum L. plant were also evaluated. Faecal sludge, Avo’o river water and Solanum Nigrum L. showed high levels of bacteriological and parasitological pollutants. Results obtained from October 2018 to May 2019 showed in average high concentrations of faecal coliforms and faecal streptococci (6092 and 3390 CFU/100 ml, respectively), as well as helminths eggs (> 273 eggs / L) in water. Despite the best growth of Solanum Nigrum L. irrigated with Avo’o river, high concentration of parasites on their leaves (43 eggs/100 g) highlight the necessity of a better management of faecal sludge in this city.
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