Data/hora: 05/06/2024 07:27:25

Provedor de dados: | 111
País: | China
Título: | Disinfection of a farmstead roof harvested rainwater for potable purposes using an automated solar photocatalytic reactor.
Autores: | Nwoke, Okala Okala; Ezema, Ifeanyichukwu Fabian; Chigor, Vincent Nnamdigadi; Anoliefo, Edward Chukwud; Mbajiorgu, Constantine Crowner.
Data: | 2018-12-26
Ano: | 2018
Palavras-chave: | Agricultural Engineering; Water Engineering; Water Treatment. Solar radiation dose; E. coli; Water disinfection; TiO2; Photocatalytic reactor.
Resumo: | Access to safe and reliable water supply is a challenge in many parts of the developing world. The use of roof harvested rainwater for domestic and potable purposes is common in households and farmsteads in the rainforest and some parts of savannah ecological zones of  Nigeria in spite of  the health risk associated with ingestion of water from an unimproved source such as untreated roof harvested rainwater. Solar photocatalysis has been proven to be effective in water treatment devoid of the short comings of high fuel cost and formation of carcinogens associated with conventional households water disinfection methods such as boiling and the use of chemicals.  In this study, an automated photocatalytic batch reactor which uses solar radiation as its photon source was developed with materials sourced locally in Nigeria. The automated system  injects contaminated water into the reactor tube and evacuates the water into the treated water tank upon the reception of a preset solar radiation dose. Roof harvested rainwater from a farmstead inoculated with E.coli was used in the evaluation. Results from the experiments show that the  automated photocatalytic batch reactor was faster in bacteria inactivation than other reactors without TiO2 insert. A solar radiation dose of 160 kJ/L received on the photocatalytic reactor effectively and consistently inactivated  E. coli concentrations of 107 ± (1.3 x 106) CFU/ml to concentrations below the detection limit of 4 CFU/ml as well as prevent E. coli regrowth after 24 hrs storage in the dark. The use of this system as a point-of- use water disinfection system could enhance access to potable water in remote places such as farmsteads.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.cigrjournal.org/index.php/Ejounral/article/view/4893
Editor: | International Commission of Agricultural and Biosystems Engineering

Relação:

http://www.cigrjournal.org/index.php/Ejounral/article/view/4893/2783

http://www.cigrjournal.org/index.php/Ejounral/article/downloadSuppFile/4893/2172

http://www.cigrjournal.org/index.php/Ejounral/article/downloadSuppFile/4893/2173

http://www.cigrjournal.org/index.php/Ejounral/article/downloadSuppFile/4893/2174

Formato: | application/pdf

Fonte:

Agricultural Engineering International: CIGR Journal; Vol 20, No 3 (2018): CIGR Journal; 52-60

1682-1130

Fonte: | Copyright (c) 2018 Agricultural Engineering International: CIGR Journal