Treatment of Pigsty Wastewater by Filters Reed Plants: Influence of Organic Load on the Efficiency of Echinochloa Pyramidalis
Bidossessi Francelle Louisette Ekpelikpeze,
Hontonho Esperance Justine Deguenon,
Akuemaho Virgile Onesime Akowanou,
Martin Pepin Aina
Issue:
Volume 10, Issue 6, December 2022
Pages:
170-175
Received:
21 October 2022
Accepted:
7 November 2022
Published:
30 November 2022
DOI:
10.11648/j.ajac.20221006.11
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Abstract: Context: Filters planted with reeds is an extensive treatment technology. Because of its relatively easy implementation and low operating cost, they arouse the enthusiasm of both decision-makers and scientists. The goal of this study is to assess the effect of organic load of a pigsty wastewater on the development of Echinochloa pyramidalis. Methodology: In order to achieve this objective, an experimental device has been installed. The device consisting of three tanks B1, B2 and B3 was supplied with wastewater from the pigsty after their characterization. After an experimental period set at 08 days, the treated effluents were then characterized. Results: The reduction obtained on the first filter pan (B1) is as follows: 60% of COD, 97.87% of MES, 90.81% of Pt and 65% of NTK. Regarding the second filter pan (B2), the reduction in COD is 20%, 96.60% for SS, 83.65% of Pt and -3.33% of NTK. As for the last experimental tank (B3) with a planted filter, the reduction is also 20% for COD, 98.30% MES, 67.68% Pt and 20% NTK. Conclusion and prospect: At the end of the experiment carried out, it is concluded that the organic load has an influence on the performance of the filters.
Abstract: Context: Filters planted with reeds is an extensive treatment technology. Because of its relatively easy implementation and low operating cost, they arouse the enthusiasm of both decision-makers and scientists. The goal of this study is to assess the effect of organic load of a pigsty wastewater on the development of Echinochloa pyramidalis. Method...
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Optimization of Extraction Parameters, Total Polyphenols and Flavonoids Contents, and Antioxidant Activity of the Aqueous Extract of Vernonia amygdalina Leaves
Bedie Mbow,
Aïssatou Alioune Gaye,
Birane Diop,
Abba Diarra Kone,
Ibrahima Diallo,
Mohamed Gaye
Issue:
Volume 10, Issue 6, December 2022
Pages:
176-182
Received:
10 November 2022
Accepted:
23 November 2022
Published:
30 November 2022
DOI:
10.11648/j.ajac.20221006.12
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Abstract: Vernonia Amygdalina is a well-known and widely used plant in traditional African medicine. The decoctions of its leaves are used in the treatment of many pathologies including hepatitis, diabetes, cancer etc. It is a plant very rich in phenolic compounds, generally responsible for the biological activity of plants. In this study, we determined the optimal extraction conditions, including temperature, duration, and solvent mass/volume ratio. Subsequently, the total polyphenol contents are determined under these optimal conditions, then the antiradical activity evaluated. The Folin-Ciocalteu reagent was used to evaluate the content of phenolic compounds, with gallic acid as a reference. The radical DPPH· made it possible to measure the antioxidant power of the extract, with reference to Trolox. This study showed that the optimal conditions for extracting the bioactive molecules responsible for the antioxidant activity are obtained for a temperature of 80°C, for a period of 30 min in a ratio of 1%. Under these conditions, the total polyphenol and flavonoid contents are respectively equal to 10.536 ± 0.145 mg/g gallic acid equivalent and 1.930 ± 0.043 mg/g quercetin equivalent. Furthermore, the results show a maximum inhibition of 41.95% for a concentration of 0.044 mg/mL, for 30 minutes. The antioxidant properties were measured and demonstrated by the kinetics of reduction with DPPH·, thus showing an inhibitory power of 75% and a fairly slow reduction reaction. This high content of phenolic compounds and the fairly significant inhibitory power of Vernonia amygdalina justify the use of this plant in traditional medicine for the treatment of numerous pathologies.
Abstract: Vernonia Amygdalina is a well-known and widely used plant in traditional African medicine. The decoctions of its leaves are used in the treatment of many pathologies including hepatitis, diabetes, cancer etc. It is a plant very rich in phenolic compounds, generally responsible for the biological activity of plants. In this study, we determined the ...
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