en Water quality and wastewater treatment and reuse Original articles <div style="text-align: justify;"><span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&quot;Times New Roman&quot;,&quot;serif&quot;"><b><i><span style="font-size:10.0pt"><span style="line-height:115%"><span style="color:black">Introduction:</span></span></span></i></b><span style="font-size:10.0pt"><span style="line-height:115%"><span style="color:black"> Accessibility to safe drinking water is an important human health issue, so </span></span></span><span style="font-size:10.0pt"><span style="line-height:115%">water reuse and water resources management are critical in arid parts of developing&nbsp; regions</span></span><span style="font-size:10.0pt"><span style="line-height:115%"><span style="color:black">. </span></span></span><span style="font-size:10.0pt"><span style="line-height:115%"><span style="color:black">This study aimed to investigate the use of a combined simple designed solar geyser/photocell for drinking water disinfection.</span></span></span><span style="font-size:10.0pt"><span style="line-height:115%"><span style="color:black"></span></span></span></span></span></span><br> <span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&quot;Times New Roman&quot;,&quot;serif&quot;"><b><i><span style="font-size:10.0pt"><span style="line-height:115%"><span style="color:black">Materials and Methods:</span></span></span></i></b><span style="font-size:10.0pt"><span style="line-height:115%"><span style="color:black"> In this study, a solar geyser with a simple design was combined with a solar cell and its efficiency on the disinfection of contaminated water was investigated. This study was carried out with artificially polluted tap water by a solar geyser joined with a solar photovoltaic cell. The heated water (55&deg;C) was kept for 2 hours using a solenoid valve. The pilot plant was operated and monitored for one year. The volume of the collected effluent was measured every 24 h. </span></span></span><span style="font-size:10.0pt"><span style="line-height:115%"><span style="color:black">The most probably number (MPN) of total coliforms and fecal coliforms in 100 mL of 24-hour composed samples were measured.</span></span></span></span></span></span><br> <span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&quot;Times New Roman&quot;,&quot;serif&quot;"><b><i><span style="font-size:10.0pt"><span style="line-height:115%"><span style="color:black">Results:</span></span></span></i></b><span style="font-size:10.0pt"><span style="line-height:115%"><span style="color:black"> The mean volume of disinfected water production was calculated as 2095.74 &plusmn; 270.28 mL/day. The strongest correlation was found between disinfected water and the maximum daily ambient air temperature with a linear model (R² = 0.9937). The results showed that by </span></span></span><span style="font-size:10.0pt"><span style="line-height:115%"><span style="color:black">increasing the sunny time, the volume of water outlet increased. Therefore, sunny time and UV radiation have direct effect on volume of disinfected water.</span></span></span><span style="font-size:10.0pt"><span style="line-height:115%"><span style="color:black"></span></span></span></span></span></span><br> <b><i><span style="font-size:10.0pt"><span style="font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Conclusion:</span></span></i></b><span style="font-size:10.0pt"><span style="font-family:&quot;Times New Roman&quot;,&quot;serif&quot;"><span style="color:black"> The simple designed solar geyser for drinking water disinfection was efficient and recommended for tropical areas, emergency conditions, and farms for agricultural activities. </span></span></span></div> Drinking Water, Water Disinfection, Solar Energy, Photovoltaic Cell. 1536 1546 http://jehsd.ssu.ac.ir/browse.php?a_code=A-10-404-1&slc_lang=en&sid=1 Davarkhah Rabbani davarrabbani@gmail.com 0000-0002-2733-9157 No Social Determinants of Health (SDH) Research Center, Kashan University of Medical Sciences, Kashan, Iran. Amir Hossein Mahvi Ahmahvi@yahoo.com 0000-0001-8733-1483 No Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. Maryam Shaterian shaterian@znu.ac.ir 0000-0002-0854-8615 No Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, Iran. Reyhaneh Hesamifard workshopwastewater@gmail.com 0000-0001-8966-912X No Social Determinants of Health (SDH) Research Center, Kashan University of Medical Sciences, Kashan, Iran. Mohammad Rezvani Ghalhari mohammad9783@gmail.com 0000-0001-9552-3004 No Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. Morteza Kabiri mrezvani.eh@gmail.com 0000-0002-6371-5615 No Social Determinants of Health (SDH) Research Center, Kashan University of Medical Sciences, Kashan, Iran. Gholamreza Mostafaii Mostafai_gr@kaums.ac.ir 0000-0002-7088-0133 Yes Social Determinants of Health (SDH) Research Center, Kashan University of Medical Sciences, Kashan, Iran.