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Manufacture of fly ash based coagulants for use in water treatment

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dc.contributor.author Maila, Goitseone Baby
dc.contributor.author Ntuli, Freeman
dc.contributor.author Lekgoba, Tumeletso
dc.date.accessioned 2021-06-17T11:54:13Z
dc.date.available 2021-06-17T11:54:13Z
dc.date.issued 2020-01
dc.identifier.citation Maila, G. B., Ntuli, F. and Lekgoba, T. (2020) Manufacture of fly ash based coagulants for use in water treatment. Test Engineering and Management, 82, 5675 - 5681. en_US
dc.identifier.issn 01934120
dc.identifier.uri http://repository.biust.ac.bw/handle/123456789/299
dc.description.abstract Fly ash was explored as a raw material for the production of three fly ash-based coagulants being raw, calcined and calcined– sodium hydroxide complex coagulants. Calcined fly ash and calcined fly ash – sodium hydroxide complex coagulants were prepared by calcining raw fly ash at a temperature of 800ºC and all three were acid washed with hydrochloric acid before being used as coagulants. A fly ash sample from a local coal fired power plant was characterization by means of an XRD and FTIR. The characterization results revealed the presence of various compounds which included quartz, hematite, magnetite, anhydrite, and ettringite with a large characteristic peak showing quartz at approximately 26º ≈ 2θ. The behaviour of the prepared coagulants in treating waste water was investigated at different turbidity ranges of low (19 NTU), medium (49 NTU) and high (80 NTU) in jar test experiments. Coagulant doses were also varied at these different turbidity levels to determine the dosage that gives the lowest turbidity for all the three coagulants. From this study, we observed that an increase in coagulant dose from 0.05 to 0.25g/l led to a decrease in residual turbidity. Calcined fly ash was more effective at low and medium turbidity at a dosage of 0.20 g/l whereas Calcined fly ash – sodium hydroxide complex coagulant was found to be more effective with the highest % reduction of 99.8% at a higher turbidity for the same dose. en_US
dc.language.iso en en_US
dc.publisher : The Mattingley Publishing Co., Inc en_US
dc.subject Bentonite Clay en_US
dc.subject Coagulant en_US
dc.subject Fly Ash en_US
dc.subject Waste Water en_US
dc.title Manufacture of fly ash based coagulants for use in water treatment en_US
dc.description.level phd en_US
dc.description.accessibility unrestricted en_US
dc.description.department cme en_US


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