Silver-Impregnated Ceramic-Water Filters to Improve Water Quality and Health

2013 ◽  
Author(s):  
Lydia Abebe
Keyword(s):  
Water Quality ◽  
Ceramic Water Filters ◽  
Improve Water Quality ◽  
Water Filters

scholarly journals Performance of black ceramic water filters and their implementation in rural Ecuador

2019 ◽  
Vol 9 (4) ◽  
pp. 694-702 ◽  
Author(s):  
Laura Guerrero-Latorre ◽  
Priscila Balseca-Enriquez ◽  
Carlos Moyota-Tello ◽  
Ronald Bravo-Camino ◽  
Stephanie Davila-Chavez ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Treatment ◽  
New Technology ◽  
Classical Model ◽  
International Standards ◽  
Household Water Treatment ◽  
Household Level ◽  
Ceramic Water Filters ◽  
Field Level ◽  
Water Filters

Abstract In rural Ecuador, microbial water contamination is associated with child morbidity mainly due to gastroenteritis. Black ceramic water filters (BCWF) are a new household water treatment recently developed to improve microbial removal from the classical model implemented worldwide. This study has assessed BCWF microbial performance at laboratory level by continuous filtering of spiked water with microbial surrogates (Escherichia coli and MS2 bacteriophage) and highly contaminated surface water to evaluate physicochemical pollutants' removal. At field level, baseline studies in Nanegal and Gualea districts have been performed to evaluate water quality and hygiene practices among communities and a six-month BCWF field implementation study in the Santa Marianita community. Results revealed poor drinking water quality in communities studied. Water treatment practices at household level were reported in low percentages. Conversely, results in BCWF filter assays at laboratory level for 600 litres of usage have shown 5.36 logarithms of bacterial removal and 3.83 logarithms for viral removal and significant reductions of physicochemical pollutants considering international standards. BCWF implementation in the Santa Marianita community reveals promising results on microbial water quality in households using this new technology. However, it is important to reinforce correct BCWF maintenance for better performance at field level.

scholarly journals A post-implementation evaluation of ceramic water filters distributed to tsunami-affected communities in Sri Lanka

2012 ◽  
Vol 10 (2) ◽  
pp. 209-220 ◽  
Author(s):  
Lisa M. Casanova ◽  
Adam Walters ◽  
Ajith Naghawatte ◽  
Mark D. Sobsey
Keyword(s):  
Water Quality ◽  
Sri Lanka ◽  
Tap Water ◽  
Water Sources ◽  
Indian Ocean Tsunami ◽  
Source Water ◽  
Cross Sectional ◽  
Ceramic Water Filters ◽  
Water Filters

Sri Lanka was devastated by the 2004 Indian Ocean tsunami. During recovery, the Red Cross distributed approximately 12,000 free ceramic water filters. This cross-sectional study was an independent post-implementation assessment of 452 households that received filters, to determine the proportion still using filters, household characteristics associated with use, and quality of household drinking water. The proportion of continued users was high (76%). The most common household water sources were taps or shallow wells. The majority (82%) of users used filtered water for drinking only. Mean filter flow rate was 1.12 L/hr (0.80 L/hr for households with taps and 0.71 for those with wells). Water quality varied by source; households using tap water had source water of high microbial quality. Filters improved water quality, reducing Escherichia coli for households (largely well users) with high levels in their source water. Households were satisfied with filters and are potentially long-term users. To promote sustained use, recovery filter distribution efforts should try to identify households at greatest long-term risk, particularly those who have not moved to safer water sources during recovery. They should be joined with long-term commitment to building supply chains and local production capacity to ensure safe water access.

scholarly journals Virus removal efficiency of Cambodian ceramic pot water purifiers

2011 ◽  
Vol 9 (2) ◽  
pp. 306-311 ◽  
Author(s):  
Hamidreza Salsali ◽  
Edward McBean ◽  
Joseph Brunsting
Keyword(s):  
Water Quality ◽  
Quality Control ◽  
Removal Efficiency ◽  
Suspended Solids ◽  
Subsequent Removal ◽  
Flow Rates ◽  
Virus Removal ◽  
Ceramic Water Filters ◽  
Removal Efficiencies ◽  
Water Filters

Virus removal efficiency is described for three types of silver-impregnated, ceramic water filters (CWFs) produced in Cambodia. The tests were completed using freshly scrubbed filters and de-ionized (DI) water as an evaluation of the removal efficiency of the virus in isolation with no other interacting water quality variables. Removal efficiencies between 0.21 and 0.45 log are evidenced, which is significantly lower than results obtained in testing of similar filters by other investigators utilizing surface or rain water and a less frequent cleaning regime. Other experiments generally found virus removal efficiencies greater than 1.0 log. This difference may be because of the association of viruses with suspended solids, and subsequent removal of these solids during filtration. Variability in virus removal efficiencies between pots of the same manufacturer, and observed flow rates outside the manufacturer's specifications, suggest tighter quality control and consistency may be needed during production.

Ceramic Water Filters as a Response Technology to Geo-Hazards

2018 ◽  
Vol 5 (1) ◽  
pp. 1-8
Author(s):  
E. McBean ◽  
◽  
G. Huang ◽  
Yongping Li ◽  
Yanfeng Li ◽  
...  
Keyword(s):  
Ceramic Water Filters ◽  
Water Filters

Action research to improve water quality in Canada’s Rideau Canal: how do local groups reshape environmental governance?

2021 ◽  
pp. 1-20
Author(s):  
Isha Mistry ◽  
Christine Beaudoin ◽  
Jyoti Kotecha ◽  
Holly Evans ◽  
Manuel Stevens ◽  
...  
Keyword(s):  
Water Quality ◽  
Action Research ◽  
Environmental Governance ◽  
Improve Water Quality ◽  
Rideau Canal

scholarly journals Statistical Modeling of Fine Sediments Dredged Using a Variable Area Dredging Suction Head to Improve Water Quality

Hydrology ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 98
Author(s):  
Leigh A. Provost ◽  
Robert Weaver ◽  
Nezamoddin N. Kachouie
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
Sedimentation Rates ◽  
Agricultural Lands ◽  
Design Efficiency ◽  
Fine Sediments ◽  
Grain Sizes ◽  
Fine Grain ◽  
Sediment Sampling ◽  
Improve Water Quality

The changing climate affects the agricultural lands, and, in turn, the changes in agricultural lands alter the watershed. A major concern regarding waterbodies is the increased sedimentation rates due to climate change. To improve the water quality, it is crucial to remove fine sediments. Using current environmental dredging methods is challenging because of the sediment volumes that must be dredged, the absence of nearby disposal sites, and the shoreline infrastructure at the dredging locations. To address these issues, we used a surgical dredging method with a variable area suction head that can easily maneuver around the docks, pilings, and other infrastructures. It can also isolate the fine grain material to better manage the dredged volumes in the seabed where nutrients are typically adhered. To this end, a statistical analysis of the dredged samples is essential to improve the design efficiency. In this work, we collected several samples using a variable area suction head with different design settings. The collected samples using each design setting were then used to model the distributions of the different grain sizes in the dredged sediments. The proposed statistical model can be effectively used for the prediction of sediment sampling outcomes to improve the gradation of the fine sediments.

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