Optimisation of using a blend of plant based natural and synthetic coagulants for water treatment: (Moringa Oleifera-Cactus Opuntia-alum blend)
| Autor: | Langa Bright Moyo, Bruce I. Gandiwa, Tirivaviri Augustine Mamvura, N. Hlabangana, Liberty L. Mguni, Sokesimbone Ncube |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
020209 energy
Alkalinity Filtration and Separation 02 engineering and technology Catalysis Education Moringa chemistry.chemical_compound 020401 chemical engineering 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering Turbidity Raw water lcsh:Chemical engineering Alum Fluid Flow and Transfer Processes Moringa oleifera Coagulation Chemistry Process Chemistry and Technology lcsh:TP155-156 Pulp and paper industry Cactus Opuntia Wastewater Cactus Water treatment Waste water Energy (miscellaneous) |
| Zdroj: | South African Journal of Chemical Engineering, Vol 34, Iss, Pp 158-164 (2020) |
| ISSN: | 1026-9185 |
| Popis: | The research presents a comparative study on the effectiveness of blending plant based natural coagulants (Cactus Opuntia and Moringa Oleifera extracts) and a synthetic coagulant (aluminium sulphate or alum) in treatment of raw water. The low production rates of natural coagulants has derailed their commercialization this has driven the idea of blending synthetic coagulants which is envisaged to be the more appropriate means of application in this study. To measure the effectiveness of the coagulant, the following parameters were measured; turbidity, pH, conductivity and total alkalinity. The simplex lattice experimental design was applied using Minitab Software to obtain the optimal coagulant blend. The models were validated by statistical analysis which showed that the model was sufficient and no further modelling was required. The optimization results showed that a combination of alum, Moringa Oleifera and Cactus Opuntia in proportions of 13%, 42.6% and 44.4%, respectively with a total coagulant dosage of 45 mg/L gave the best overall results with the resultant water having a turbidity, pH, conductivity and total alkalinity of 2.7 NTU, 6.99, 308 µS/cm and 137.7 mg/L respectively. These physiochemical parameters are within required limits for potable water as per WHO guidelines. From the results, it was concluded that aluminium sulphate (alum) can be successfully blended with natural plant-based coagulants for raw water treatment. |
| Databáze: | OpenAIRE |
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