Capability of 19-L polycarbonate plastic water cooler containers for efficient solar water disinfection (SODIS): Field case studies in India, Bahrain and Spain

Keogh, Michael B.; Castro-Alférez, María; Polo-López, M.I.; Calderero, I Fernández; Al-Eryani, Y A; Joseph-Titus, C; Sawant, B; Dhodapkar, Rita; Mathur, Chandana; McGuigan, Kevin G.; Fernández‐Ibáñez, Pilar

doi:10.1016/j.solener.2015.03.035

Cited by 51 publications

(37 citation statements)

References 17 publications

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“…The mechanism of action of this photo-induced process has been intensively investigated since nineties till now. Most of research was focused on the influence of key parameters like water temperature45, solar energy dose6, turbidity of polluted water7, dissolved oxygen8, nature of the microorganism9, and other studies on the practical application of this technique and field trials in several locations10111213. Other contributions report research and technical developments in solar reactors to use SODIS for scaled-up solutions11415.…”

mentioning

confidence: 99%

Intracellular mechanisms of solar water disinfection

Castro-Alférez

Polo-López

Fernández‐Ibáñez³

2016

Sci Rep

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Solar water disinfection (SODIS) is a zero-cost intervention measure to disinfect drinking water in areas of poor access to improved water sources, used by more than 6 million people in the world. The bactericidal action of solar radiation in water has been widely proven, nevertheless the causes for this remain still unclear. Scientific literature points out that generation of reactive oxygen species (ROS) inside microorganisms promoted by solar light absorption is the main reason. For the first time, this work reports on the experimental measurement of accumulated intracellular ROS in E. coli during solar irradiation. For this experimental achievement, a modified protocol based on the fluorescent probe dichlorodihydrofluorescein diacetate (DCFH-DA), widely used for oxidative stress in eukaryotic cells, has been tested and validated for E. coli. Our results demonstrate that ROS and their accumulated oxidative damages at intracellular level are key in solar water disinfection.

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mentioning

confidence: 99%

Intracellular mechanisms of solar water disinfection

Castro-Alférez

Polo-López

Fernández‐Ibáñez³

2016

Sci Rep

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“…Keogh et al [34] noted that Enterococcus spp. had increased resistance to SODIS compared to E. coli.…”

Section: Discussionmentioning

confidence: 99%

A study of the bacteriological quality of roof-harvested rainwater and an evaluation of SODIS as a suitable treatment technology in rural Sub-Saharan Africa

Nalwanga

Muyanja

McGuigan

et al. 2018

Journal of Environmental Chemical Engineering

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“…Plant coagulants also have invaluable advantages for application in SODIS treatment, to increase the willingness of water consumption. An attempt was also made to enhance the classic 2‐L PET bottle for SODIS . The authors studied the microbial inactivation ( E. coli ) efficacy of 19‐L water cooler/dispenser containers (WDC) reactors of natural well‐water and turbid water.…”

Section: Discussionmentioning

confidence: 99%

“…However, the two disadvantages of SODIS remain the volume of treated water and the limitation to water turbidity of less than 30 NTU. The limitation to a small volume for treatment can be addressed by using several bottles simultaneously . However, this increases the time and labor routinely associated with obtaining, filling, and treating the bottles.…”

Section: Introductionmentioning

confidence: 99%

“…However, this increases the time and labor routinely associated with obtaining, filling, and treating the bottles. If one wants to address the volume‐related drawbacks of SODIS, then one must identify a larger container that is readily available, inexpensive, and suitable for SODIS . Regarding the limitation of SODIS for high water turbidity levels, there is a need to provide a practical method of reducing turbidity in water prior to SODIS using locally available materials that are both safe and effective.…”

Section: Introductionmentioning

confidence: 99%

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Coupling Extracts of Plant Coagulants With Solar Disinfection Showed a Complete Inactivation of Faecal Coliforms

Megersa

Beyene²,

Ambelu³

et al. 2018

CLEAN Soil Air Water

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The small treated volume of water in polyethylene terephthalate (PET) bottles used in solar water disinfection (SODIS), and incomplete inactivation of bacteria at high water turbidity of ≥30 nephelometric turbidity units (NTU) are the major drawbacks of solar water treatment techniques. To address these problems, field experiments are conducted to inactivate faecal coliforms under natural sunlight. To assess the efficacy of large volumes, 3, 5, and 10‐L transparent plastic containers are used along with standard PET bottles (2 L) as SODIS reactors. To reduce the turbidity of the water, extracts of natural coagulants from tubers of Maerua subcordata and seeds of Moringa stenopetala are used. The results revealed that the turbidity of water and volume of containers affect the efficiency of SODIS, where the highest bacterial inactivation is observed at 10 NTU and a 0.5‐L PET bottle. However, the combined water treatment experiments of coagulation with extracts of either M. subcordata or M. stenopetala followed by SODIS on turbid water (150 NTU) showed 100% reduction of faecal coliforms with 4 h of exposure. This research demonstrates that a 10‐L container filled with water can be treated combining plant extracts with SODIS. The technology can be used for provision of safe and adequate drinking water for rural communities in developing countries.

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Capability of 19-L polycarbonate plastic water cooler containers for efficient solar water disinfection (SODIS): Field case studies in India, Bahrain and Spain

Cited by 51 publications

References 17 publications

Intracellular mechanisms of solar water disinfection

Intracellular mechanisms of solar water disinfection

A study of the bacteriological quality of roof-harvested rainwater and an evaluation of SODIS as a suitable treatment technology in rural Sub-Saharan Africa

Coupling Extracts of Plant Coagulants With Solar Disinfection Showed a Complete Inactivation of Faecal Coliforms

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