Comparative study of the effects of Herbal and chemical Coagulants in the clarification of raw water
| Autor: | Mamounata Diao, Jean Diarra, Anderson F. Konkobo, Paul W. Savadogo, Mamoudou H. Dicko |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Aluminum sulphate
Chemistry 02 engineering and technology 010501 environmental sciences Pulp and paper industry 01 natural sciences Moringa Human health Decantation 0202 electrical engineering electronic engineering information engineering 020201 artificial intelligence & image processing Water treatment Raw water Turbidity General Agricultural and Biological Sciences 0105 earth and related environmental sciences |
| Zdroj: | African Journal of Agricultural Research. 17:532-541 |
| ISSN: | 1991-637X |
| Popis: | The use of aluminum sulphate in clarifying raw waters raises many concerns about its impact on human health. Thus, the present study was initiated to compare the effects of Moringa oleifera and aluminum sulphate besides evaluating the association between M. oleifera or aluminum sulphate with Opuntia ficus-indica or syntofloc for water treatment. The essays were carried in Jar Test using waters of 352.80 Nephelometric Turbidity Units (NTU). The monitoring of different physico-chemical and microbiological parameters at different doses and after different decanting time was used to determine optimal conditions and evaluate the effectiveness of treatment. The results showed that it took fewer doses and less decanting time for aluminum sulphate than moringa to obtain the same residual turbidity. The use of 0.9 g/L of moringa removed 99% of turbidity after 12 h of decanting. Successive use of moringa (0.9 g/L) with O. ficus-indica extract (0.6 ml) reduced the decanting time to 15 min. However, this treatment eliminated only about 57% of total coliforms. The moringa/cactus association, although highly effective, remains less than the treatment based on aluminum sulphate and synthofloc. This "organic" association is nevertheless an ideal alternative because of its great capacities that could be further optimized. Key words: Coagulation-flocculation, turbidity, Moringa oleifera, aluminum sulphate, Cactus. |
| Databáze: | OpenAIRE |
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