Investigating opportunities for use of alternative coagulants for drinking water treatment at Morton Jaffray Water Treatment works, Harare, Zimbabwe

Drinking water treatment at Harare's main water works, Morton Jaffray Water Treatment Works (MJWTW), has been a challenge due to source (Lake Chivero) pollution, and the efficacy of some of the processes and chemicals including aluminium sulphate (alum) has been questioned. This study investiga...

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Autores principales:	Zvikomborero Hoko, Lawrence Manganye, Lisben Chipfunde
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	alternative coagulant drinking water lake chivero morton jaffray water works water treatment Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/abb0a35ba21145a98b6b330d447c301a
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spelling	oai:doaj.org-article:abb0a35ba21145a98b6b330d447c301a2021-11-05T21:14:19ZInvestigating opportunities for use of alternative coagulants for drinking water treatment at Morton Jaffray Water Treatment works, Harare, Zimbabwe1751-231X10.2166/wpt.2021.030https://doaj.org/article/abb0a35ba21145a98b6b330d447c301a2021-07-01T00:00:00Zhttp://wpt.iwaponline.com/content/16/3/806https://doaj.org/toc/1751-231XDrinking water treatment at Harare's main water works, Morton Jaffray Water Treatment Works (MJWTW), has been a challenge due to source (Lake Chivero) pollution, and the efficacy of some of the processes and chemicals including aluminium sulphate (alum) has been questioned. This study investigated the use of an alternative coagulant to the traditional use of alum at MJWTW. The effectiveness of five coagulants, namely Anhydrous Poly Aluminium Chloride (APAC), Poly Aluminium Chloride (PAC), Primco 100, Zetafloc 4030 and alum (control) was investigated by flocculation tests in a laboratory using Lake Chivero water. Parameters analysed included pH, turbidity, Electrical Conductivity (EC) and chlorophyll-a for raw water and treated water. Raw water mean pH was 7 ± 0.4, turbidity (3.3 ± 0.2 NTU), EC (337 ± 5.0 μS/cm) and chlorophyll-a concentration (2.28 μg/L). Primco 100 had the best performance with the lowest optimum dosage of 25 mg/L while alum had the highest dosage of 55 mg/L. APAC, PAC, Primco 100 and Zetafloc 4030 did not change the pH of water significantly but alum did. The study concluded that Primco 100 was the most suitable coagulant and could be an alternative to alum. Highlights Provides insight on developing technology on coagulants for treatment plants.; Closes research gap on use of alternative coagulants at water treatment plants in Zimbabwe.; Provides practical guidelines on how to select a new coagulant, especially in developing countries.; Provides insights on cost saving measures in water treatment process at MJWTW.; Provides extensive methods of laboratory tests in assessing efficacy of coagulants.;Zvikomborero HokoLawrence ManganyeLisben ChipfundeIWA Publishingarticlealternative coagulantdrinking waterlake chiveromorton jaffray water workswater treatmentEnvironmental technology. Sanitary engineeringTD1-1066ENWater Practice and Technology, Vol 16, Iss 3, Pp 806-824 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	alternative coagulant drinking water lake chivero morton jaffray water works water treatment Environmental technology. Sanitary engineering TD1-1066
spellingShingle	alternative coagulant drinking water lake chivero morton jaffray water works water treatment Environmental technology. Sanitary engineering TD1-1066 Zvikomborero Hoko Lawrence Manganye Lisben Chipfunde Investigating opportunities for use of alternative coagulants for drinking water treatment at Morton Jaffray Water Treatment works, Harare, Zimbabwe
description	Drinking water treatment at Harare's main water works, Morton Jaffray Water Treatment Works (MJWTW), has been a challenge due to source (Lake Chivero) pollution, and the efficacy of some of the processes and chemicals including aluminium sulphate (alum) has been questioned. This study investigated the use of an alternative coagulant to the traditional use of alum at MJWTW. The effectiveness of five coagulants, namely Anhydrous Poly Aluminium Chloride (APAC), Poly Aluminium Chloride (PAC), Primco 100, Zetafloc 4030 and alum (control) was investigated by flocculation tests in a laboratory using Lake Chivero water. Parameters analysed included pH, turbidity, Electrical Conductivity (EC) and chlorophyll-a for raw water and treated water. Raw water mean pH was 7 ± 0.4, turbidity (3.3 ± 0.2 NTU), EC (337 ± 5.0 μS/cm) and chlorophyll-a concentration (2.28 μg/L). Primco 100 had the best performance with the lowest optimum dosage of 25 mg/L while alum had the highest dosage of 55 mg/L. APAC, PAC, Primco 100 and Zetafloc 4030 did not change the pH of water significantly but alum did. The study concluded that Primco 100 was the most suitable coagulant and could be an alternative to alum. Highlights Provides insight on developing technology on coagulants for treatment plants.; Closes research gap on use of alternative coagulants at water treatment plants in Zimbabwe.; Provides practical guidelines on how to select a new coagulant, especially in developing countries.; Provides insights on cost saving measures in water treatment process at MJWTW.; Provides extensive methods of laboratory tests in assessing efficacy of coagulants.;
format	article
author	Zvikomborero Hoko Lawrence Manganye Lisben Chipfunde
author_facet	Zvikomborero Hoko Lawrence Manganye Lisben Chipfunde
author_sort	Zvikomborero Hoko
title	Investigating opportunities for use of alternative coagulants for drinking water treatment at Morton Jaffray Water Treatment works, Harare, Zimbabwe
title_short	Investigating opportunities for use of alternative coagulants for drinking water treatment at Morton Jaffray Water Treatment works, Harare, Zimbabwe
title_full	Investigating opportunities for use of alternative coagulants for drinking water treatment at Morton Jaffray Water Treatment works, Harare, Zimbabwe
title_fullStr	Investigating opportunities for use of alternative coagulants for drinking water treatment at Morton Jaffray Water Treatment works, Harare, Zimbabwe
title_full_unstemmed	Investigating opportunities for use of alternative coagulants for drinking water treatment at Morton Jaffray Water Treatment works, Harare, Zimbabwe
title_sort	investigating opportunities for use of alternative coagulants for drinking water treatment at morton jaffray water treatment works, harare, zimbabwe
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/abb0a35ba21145a98b6b330d447c301a
work_keys_str_mv	AT zvikomborerohoko investigatingopportunitiesforuseofalternativecoagulantsfordrinkingwatertreatmentatmortonjaffraywatertreatmentworkshararezimbabwe AT lawrencemanganye investigatingopportunitiesforuseofalternativecoagulantsfordrinkingwatertreatmentatmortonjaffraywatertreatmentworkshararezimbabwe AT lisbenchipfunde investigatingopportunitiesforuseofalternativecoagulantsfordrinkingwatertreatmentatmortonjaffraywatertreatmentworkshararezimbabwe
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Investigating opportunities for use of alternative coagulants for drinking water treatment at Morton Jaffray Water Treatment works, Harare, Zimbabwe

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