Removal of fluoride, arsenic and coliform bacteria by modified homemade filter media from drinking water

Devi, Rani; Alemayehu, Esayas; Singh, Vinay Pratap; Kumar, Ashok; Mengistie, Embialle

doi:10.1016/j.biortech.2007.05.002

Cited by 60 publications

(41 citation statements)

References 17 publications

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“…Many studies have been carried out to investigate the removal of microorganisms from drinking water and surface water using fixed-bed filtration systems [2,3] or membrane filtration [4]. High removal efficiencies (from 99% to complete removal) can usually be achieved through various mechanisms, such as adsorption and inactivation, depending on filter media characteristics and local climatic conditions.…”

Section: Introductionmentioning

confidence: 99%

Removal of Microorganisms in Drinking Water using a Pulsed High Voltage

et al. 2013

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Abstract.A pulsed high voltage was used to remove microorganisms in drinking water. The effects of the pulsed high voltage on pH, conductivity, temperature and oxidation reduction potential (ORP) of the drinking water were investigated. The observed results show that the removal efficiency with respect to fecal coliforms and total coliforms increased with the increase of the pulsed high voltage. The removal efficiency for microorganisms such as fecal coliforms and total coliforms was in the range 25-100% and 44-100%, respectively, after the water was exposed to a pulsed high voltage of 5-10 kV for 60 minutes. An increase of the pulsed high voltage caused a decrease in the conductivity and ORP with operational time.

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Section: Introductionmentioning

confidence: 99%

Removal of Microorganisms in Drinking Water using a Pulsed High Voltage

et al. 2013

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“…No V. cholerae and S. typhimurium were detected in any of the surface water sources after filtration in both the BSF-S and BSF-Z, while S. dysenteriae was detected in 2/18 (11%) of the water samples collected from the BSF-S (Table 4). The bacterial removal efficiencies of the biosand filter (BSF) have been reported to range between 60% and 100% (Ngai et al, 2007 andDevi et al, 2008). The higher performance of the BSF-S can be attributed to the enhanced straining efficiency through the fine pores formed in the filter media of 0.15 mm grain size, in combination with the development of the biological layer over time.…”

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confidence: 99%

Removal of waterborne bacteria from surface water and groundwater by cost-effective household water treatment systems (HWTS): A sustainable solution for improving water quality in rural communities of Africa

Mwabi¹,

Mamba²,

Momba³

2013

WSA

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In this study 5 household water-treatment devices/systems (HWTS) were constructed using inexpensive local materials (sand, gravel, zeolites and clays). They included the silver-impregnated porous pot filter (SIPP), the ceramic candle filter (CCF), the conventional biosand filter (BSF-S), a modified biosand filter with zeolites (BSF-Z), and a bucket filter (BF). Their ability to remove turbidity and pathogenic bacteria (Vibrio cholerae, Salmonella typhimurium and Shigella dysenteriae) from synthetic sterile water, groundwater and surface-water sources was evaluated. The flow rates ranged from 0.05 ℓ·h ) and lowest (14% to 76% (2.91 to 7.19 NTU)) average percentage turbidity removals were noted for SIPP and BF, respectively. The SIPP was the only device that consistently removed 100% of all target pathogens throughout the study. Its performance was found to be significantly superior (p<0.05) compared to that of the other four devices. Sixty (60%) to 100% bacterial removals were observed for BSF-S; 90% to 100% for BSF-Z; 90% to 100% for CCF; and 40% to 99.9% for BF. Based on the findings of this study the SIPP can be recommended for use by rural communities as it consistently produced high-quality water that complied with the SANS 241 turbidity and microbiological limits for drinking water.

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“…Many studies were conducted to evaluate the performance of water filter system and these studies have shown high removal percentage [5][6][7][8][9]. [5] showed that reverse osmosis in water filter system removed total suspended solids and turbidity more than 99% and 98%, respectively, by using electrocoagulation as a media filter.…”

Section: Introductionmentioning

confidence: 99%

“…[8] shown the percentage removal for arsenic is 95% by using a ceramic filter as water filter system and the media is clay soil and rice bran. According to [9], the percentage removal for arsenic were 7.7-50% by using modified homemade filter and the media was crushed brick. Even though the percentage removals were high and shows the good performance of water filter system, the performance after long duration is not emphasize.…”

Section: Introductionmentioning

confidence: 99%

Measurement of Water Quality Parameters for Before and After Maintenance Service in Water Filter System

2017

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Abstract. An adequate supply of safe drinking water is one of major ways to obtain healthy life. Water filter system is one way to improve the water quality. However, to maintain the performance of the system, it need to undergo the maintenance service. This study evaluate the requirement of maintenance service in water filter system. Water quality was measured before and after maintenance service. Parameters measured were pH, turbidity, residual chlorine, nitrate and heavy metals and these parameters were compared with National Drinking Water Quality Standards. Collection of data were involved three housing areas in Johor. The quality of drinking water from water filter system were analysed using pH meter, turbidity meter, DR6000 and Inductively Coupled Plasma-Mass Spectrometer. pH value was increased from 16.4% for before maintenance services to 30.7% for after maintenance service. Increment of removal percentage for turbidity, residual chlorine and nitrate after maintenance were 21.5, 13.6 and 26.7, respectively. This result shows that maintenance service enhance the performance of the system. However, less significant of maintenance service for enhance the removal of heavy metals which the increment of removal percentage in range 0.3 to 9.8. Only aluminium shows percentage removal for after maintenance with 92.8% lower compared to before maintenance service with 95.5%.

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Removal of fluoride, arsenic and coliform bacteria by modified homemade filter media from drinking water

Cited by 60 publications

References 17 publications

Removal of Microorganisms in Drinking Water using a Pulsed High Voltage

Removal of Microorganisms in Drinking Water using a Pulsed High Voltage

Removal of waterborne bacteria from surface water and groundwater by cost-effective household water treatment systems (HWTS): A sustainable solution for improving water quality in rural communities of Africa

Measurement of Water Quality Parameters for Before and After Maintenance Service in Water Filter System

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