Search Results - "Ochieng Aoyi"

Adsorption of hexavalent chromium onto magnetic natural zeolite-polymer composite by Mthombeni, Nomcebo H., Onyango, Maurice S., Aoyi, Ochieng

“…•MZ-PPy with improved density was successfully synthesized for Cr(IV) removal.•Improved adsorption capacity was achieved using MZ-PPy.•The sorption kinetic…”
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Evaluation of synergy and bacterial regrowth in photocatalytic ozonation disinfection of municipal wastewater by Mecha, Achisa C., Onyango, Maurice S., Ochieng, Aoyi, Momba, Maggy N.B.

“…The use of solar and ultraviolet titanium dioxide photocatalytic ozonation processes to inactivate waterborne pathogens (Escherichia coli, Salmonella species,…”
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Ozonolysis pre-treatment of waste activated sludge for solubilization and biodegradability enhancement by Otieno, Benton, Apollo, Seth, Kabuba, John, Naidoo, Bobby, Simate, Geoffrey, Ochieng, Aoyi

“…Handling of waste activated sludge (WAS) has been a great problem due to its low biodegradability which is contributed by the biorecalcitrant bacterial cells…”
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Removal of fluoride ions from aqueous solution at low pH using schwertmannite by Eskandarpour, Akbar, Onyango, Maurice S., Ochieng, Aoyi, Asai, Shigeo

“…Wastewater containing fluoride requires polishing after precipitation/coagulation treatment in order to meet stringent environmental legislation. Accordingly,…”
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Green economy in the wastewater treatment sector : jobs, awareness, barriers, and opportunities in selected local governments in South Africa by Otieno, Benton, Ochieng, Aoyi

“…The green economy (GE) has increasingly gained international focus, with new strategies aimed at restructuring the economy in an environmentally friendly…”
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Integrated anaerobic digestion and photodegradation of slaughterhouse wastewater: Energy analysis and degradation of aromatic compounds by Brooms, Thabo, Apollo, Seth, Otieno, Benton, Onyango, Maurice S., Kabuba, John, Ochieng, Aoyi

“…Combined anaerobic digestion (AD) and photodegradation of slaughterhouse wastewater (SWW) was carried out to remove biodegradable chemical oxygen demand (COD)…”
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Breakthrough Analysis for Water Defluoridation Using Surface-Tailored Zeolite in a Fixed Bed Column by Onyango, Maurice S, Leswifi, Taile Yvonne, Ochieng, Aoyi, Kuchar, Dalibor, Otieno, Fred O, Matsuda, Hitoki

“…Treatment of drinking water containing fluoride ion requires a robust and an effective technique. This can be achieved by the use of an appropriate sorption…”
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UV/H2O2/TiO2/Zeolite Hybrid System for Treatment of Molasses Wastewater by Seth Apollo, Maurice S. Onyongo, Aoyi Ochieng

“…Wastewater from molasses processing contains a large amount of coloured substances that give a recalcitrant dark brown colour and high organic load to the…”
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CFD simulation of solids off-bottom suspension and cloud height by Ochieng, Aoyi, Lewis, Alison E.

“…Solids suspension in stirred tanks is important, especially in the mineral processing industry, and it is one of the factors that influence the process…”
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Cobalt(II) removal from synthetic wastewater by adsorption on South African coal fly ash by Musapatika, Evans T., Onyango, Maurice S., Aoyi, Ochieng

“…Advanced wastewater-treatment techniques such as adsorption are essential in the removal of non- biodegradable toxic wastes from water. In this study, the use…”
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CFD simulation of solids suspension in stirred tanks: Review by Ochieng Aoyi, Onyango Mrice S.

“…Many chemical reactions are carried out using stirred tanks, and the efficiency of such systems depends on the quality of mixing, which has been a subject of…”
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Nickel solids concentration distribution in a stirred tank by Ochieng, Aoyi, Lewis, Alison E.

“…Nickel solids concentration distribution in a stirred tank was investigated using computational fluid dynamics (CFD) and experimental methods. The laser…”
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Sorption Characteristics of Mixed Molecules of Glutaraldehyde from Water on Mesoporous Acid-Amine Modified Low-Cost Activated Carbon: Mechanism, Isotherm, and Kinetics by Leswifi, Taile Y., Aoyi, Ochieng, Maurice, Onyango S., Lloyd, Mukosha

“…The environmental discharge of inefficiently treated waste solutions of the strong biocide glutaraldehyde (GA) from hospitals has potential toxic impact on…”
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Sorption of melanoidin onto surfactant modified zeolite by Onyango Maurice S., Kittinya Jacob, Hadebe Nomcebo, Ojijo Vincent O., Ochieng Aoyi

“…Melanoidin is responsible for the dark brown colour of distillery wastewater. Discharge of coloured wastewater has a major environmental impact on the biota of…”
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CFD SIMULATION OF THE HYDRODYNAMICS AND MIXING TIME IN A STIRRED TANK by AOYI OCHIENG, MAURICE S. ONYANGO

“…Hydrodynamics and mixing efficiency in stirred tanks influence power draw and are therefore important for the design of many industrial processes. In the…”
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Monte Carlo simulation of the light distribution in an annular slurry bubble column photocatalytic reactor by Akach, John, Ochieng, Aoyi

“…[Display omitted] •Light distribution in a bubble column reactor was simulated using Monte Carlo model.•The model was validated using total transmitted…”
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Magnetic Fixed-bed Column for Cr(VI) Removal from Aqueous Solution Using Schwertmannite by Eskandarpour, Akbar, Onyango, Maurice S., Tanahashi, Mitsuru, Ochieng, Aoyi, Bando, Yoshiyuki, Iwai, Kazuhiko, Okido, Masazumi, Asai, Shigeo

“…The fine particles of schwertmannite as an iron oxyhydroxide adsorbent has been suggested as a novel and strong Cr(VI) sorbent for treatment of Cr-contaminated…”
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Simulation of the Light Distribution in a Solar Photocatalytic Bubble Column Reactor Using the Monte Carlo Method by Akach, John, Kabuba, John, Ochieng, Aoyi

“…Solar illuminated reactors have been used by several researchers for photocatalytic wastewater treatment. In this work, the light distribution in a solar…”
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Modeling adsorption and photocatalytic treatment of recalcitrant contaminant on multi-walled carbon/TiO2 nanocomposite by Pete, Kwena Yvonne, Kabuba, John, Otieno, Benton, Ochieng, Aoyi

“…A nanocomposite photocatalyst consisting of titanium dioxide (TiO 2 ) supported on multiwalled carbon nanotubes (MWCNTs) has been successfully prepared and…”
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Combined anaerobic digestion and photocatalytic treatment of distillery effluent in fluidized bed reactors focusing on energy conservation by Apollo, Seth, Aoyi, Ochieng

“…Anaerobic digestion (AD) can remove substantial amount of organic load when applied in treating distillery effluent but it is ineffective in colour reduction…”
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