V. Tsama - Academia.edu (original) (raw)
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Universidad Nacional de Colombia (National University of Colombia)
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Papers by V. Tsama
Innovare Journal of Agricultural Sciences, 2021
Objective: The main objective of this research was to evaluate the growth parameters and sanitary... more Objective: The main objective of this research was to evaluate the growth parameters and sanitary quality of Solanum nigrum L. irrigated with polluted water from Avo’o river in Nomayos. Methods: Faecal sludge, water from Avo’o River and Solanum nigrum L., were analysed with respect to microbiological and parasitological parameters. Four points (S0: Control site, located in Mbankomo at 3 km away from faecal sludge discharge area; S1: located at 810 m before the faecal sludge discharge area; S2: located at 100 m away from the faecal sludge discharge area; and S3: located at 350 m after the faecal sludge discharge area) were considered for sampling events. For faecal indicator (FC: Faecal coliforms and FS: Faecal Streptococci), the membrane filtration method was used. Helminthes eggs were determined using the method of Bailenger, modified by Rodier. The growth parameters of S. nigrum L., measured in different site mentioned above, were plant height, number, length and width of fresh le...
Les villes camerounaises se caracterisent par l’absence d’une reelle politique en matiere d’assai... more Les villes camerounaises se caracterisent par l’absence d’une reelle politique en matiere d’assainissement. La gestion des boues telle qu’elle est actuellement pratiquee se limite a la vidange des installations sanitaires, assuree par les services municipaux ou des entreprises privees et ne prevoit pas de systeme de traitement. A Yaounde, les boues de vidange recoltees a travers la ville sont deversees dans un depotoir, a Nomayos. Ce depotoir jouxte malheureusement un cours d’eau, l’Avo’o dont les eaux sont utilisees pour l’irrigation des cultures maraicheres une activite generatrice de revenus, tres repandue dans cette zone. L’objectif de la presente etude est de faire une identification qualitative et quantitative des œufs d’helminthes contenus dans les boues de vidange, des eaux d’irrigation et d’evaluer la contamination des cultures maraicheres de Nomayos. Les resultats de l’analyse parasitologique montrent des concentrations moyennes de 3601 œufs d’helminthes/L pour les boues d...
Ecological Engineering, 2008
The yard-scale dewatering experiments conducted in Cameroon aimed at studying the effects of faec... more The yard-scale dewatering experiments conducted in Cameroon aimed at studying the effects of faecal sludge (FS) on growth characteristics of Echinochloa pyramidalis and Cyperus papyrus. After 6 months of gradually increasing the FS loading, the dewatering beds were batch-fed once a week for another 6 months with FS at 100, 200 and 300kgTS/(m2year) during which several morphological plant parameters were
Ecological Engineering, 2008
Cyperus papyrus Echinochloa pyramidalis Faecal sludge Growth characteristics Nutrient contents Pl... more Cyperus papyrus Echinochloa pyramidalis Faecal sludge Growth characteristics Nutrient contents Planted drying beds Sludge dewatering beds Vertical-flow constructed wetlands a b s t r a c t The yard-scale dewatering experiments conducted in Cameroon aimed at studying the effects of faecal sludge (FS) on growth characteristics of Echinochloa pyramidalis and Cyperus papyrus. After 6 months of gradually increasing the FS loading, the dewatering beds were batch-fed once a week for another 6 months with FS at 100, 200 and 300 kg TS/(m 2 year) during which several morphological plant parameters were weekly monitored. Plant growth was stimulated by sludge flooding. However, E. pyramidalis grew sturdier with increasing FS concentration, whereas C. papyrus tended to develop its below-ground plant parts. At least 150 and 20 dry tons/(ha year) of above-ground biomass, and 30 and 80 dry tons/(ha year) of
Innovare Journal of Agricultural Sciences, 2021
Objective: The main objective of this research was to evaluate the growth parameters and sanitary... more Objective: The main objective of this research was to evaluate the growth parameters and sanitary quality of Solanum nigrum L. irrigated with polluted water from Avo’o river in Nomayos. Methods: Faecal sludge, water from Avo’o River and Solanum nigrum L., were analysed with respect to microbiological and parasitological parameters. Four points (S0: Control site, located in Mbankomo at 3 km away from faecal sludge discharge area; S1: located at 810 m before the faecal sludge discharge area; S2: located at 100 m away from the faecal sludge discharge area; and S3: located at 350 m after the faecal sludge discharge area) were considered for sampling events. For faecal indicator (FC: Faecal coliforms and FS: Faecal Streptococci), the membrane filtration method was used. Helminthes eggs were determined using the method of Bailenger, modified by Rodier. The growth parameters of S. nigrum L., measured in different site mentioned above, were plant height, number, length and width of fresh le...
Les villes camerounaises se caracterisent par l’absence d’une reelle politique en matiere d’assai... more Les villes camerounaises se caracterisent par l’absence d’une reelle politique en matiere d’assainissement. La gestion des boues telle qu’elle est actuellement pratiquee se limite a la vidange des installations sanitaires, assuree par les services municipaux ou des entreprises privees et ne prevoit pas de systeme de traitement. A Yaounde, les boues de vidange recoltees a travers la ville sont deversees dans un depotoir, a Nomayos. Ce depotoir jouxte malheureusement un cours d’eau, l’Avo’o dont les eaux sont utilisees pour l’irrigation des cultures maraicheres une activite generatrice de revenus, tres repandue dans cette zone. L’objectif de la presente etude est de faire une identification qualitative et quantitative des œufs d’helminthes contenus dans les boues de vidange, des eaux d’irrigation et d’evaluer la contamination des cultures maraicheres de Nomayos. Les resultats de l’analyse parasitologique montrent des concentrations moyennes de 3601 œufs d’helminthes/L pour les boues d...
Ecological Engineering, 2008
The yard-scale dewatering experiments conducted in Cameroon aimed at studying the effects of faec... more The yard-scale dewatering experiments conducted in Cameroon aimed at studying the effects of faecal sludge (FS) on growth characteristics of Echinochloa pyramidalis and Cyperus papyrus. After 6 months of gradually increasing the FS loading, the dewatering beds were batch-fed once a week for another 6 months with FS at 100, 200 and 300kgTS/(m2year) during which several morphological plant parameters were
Ecological Engineering, 2008
Cyperus papyrus Echinochloa pyramidalis Faecal sludge Growth characteristics Nutrient contents Pl... more Cyperus papyrus Echinochloa pyramidalis Faecal sludge Growth characteristics Nutrient contents Planted drying beds Sludge dewatering beds Vertical-flow constructed wetlands a b s t r a c t The yard-scale dewatering experiments conducted in Cameroon aimed at studying the effects of faecal sludge (FS) on growth characteristics of Echinochloa pyramidalis and Cyperus papyrus. After 6 months of gradually increasing the FS loading, the dewatering beds were batch-fed once a week for another 6 months with FS at 100, 200 and 300 kg TS/(m 2 year) during which several morphological plant parameters were weekly monitored. Plant growth was stimulated by sludge flooding. However, E. pyramidalis grew sturdier with increasing FS concentration, whereas C. papyrus tended to develop its below-ground plant parts. At least 150 and 20 dry tons/(ha year) of above-ground biomass, and 30 and 80 dry tons/(ha year) of