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CERAMIC WATER FILTER FOR DRINKING WATER TREATMENT
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CERAMIC WATER FILTER FOR DRINKING WATER TREATMENT
1.
International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 06 | Jun 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 1322 CERAMIC WATER FILTER FOR DRINKING WATER TREATMENT NAJLA K1, BINISHA P2 1M. Tech student, Dept. of Civil Engineering, KMCT College of Engineering for women, Kerala, India 2Asst.Professor, Dept. of Civil Engineering, KMCT College of Engineering for women, Kerala, India ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract – One of the greatest threats to human health in developing countries is the drinking water contamination. Ceramic water filters (CWFs), manufactured from naturally sourced materials and manufactured by local labor are one of the most socially acceptable for drinking water treatment technologies because of their effectiveness, low-cost and ease of use. Ceramic water filtration has been greatly improved to remove most of the microbial contamination in water. Inpast, the developed ceramic filters are not able to treat chemical contaminants in water. Therefore, aim of this project is to develop a ceramic water filter that could remove certain chemical contamination in water at the household level. This review also summarizes the critical factors that influence the performance of CWFs, including CWF manufacturing process (raw material selection, silver impregnation), and initial water quality before treatment. Key Words: Ceramic water filter; silver coated calcium hydroxyapatite; Burn out materials 1. INTRODUCTION In the early 2022, the world population has reached 7.9 billion. It is estimated that 884 million people, that is 1 in 9 do not have access to clean drinking water sources. The World Health Organization reported that 80% of gastrointestinal disease is causedbytheuseofcontaminated drinking water. Vibrio cholera, Escherichia coli, and Shigella dysenteriae are some of the pathogens that are commonly found in drinking water in developing communities and can cause diseases such as diarrhoea, that could lead to dehydration, malnutritionor evendeath.Nearly,99.8%child deaths resulting from gastrointestinal infections is happening in developing countries. The major causes of these infections and the resulting deaths arelack ofaccessto drinking water and exposure to waterborne diseases from unsafe drinking water. Finally, all water related diseasesare caused due to the lack of provision of sufficiently pure water for the basic needs of the community. 1.1 Development of Ceramic Water Filter A filter is defined as a device, which removes something from whatever passes through it. Therefore, ceramic water filtration is defined as the process in which a porousceramic (fired clay) medium is used to filter microbes or other contaminants from water. Ceramic water filters (CWFs) are simple and effective devices made from naturally available materials for providing safe drinking water. Thistechnology is currently used in more than 50 countries as a cheap and effective point-of-use water treatment option. The size of pores in the ceramic medium is small enough to trap anything bigger than a water molecule. From the ancient times to the present, water filters have developed of necessity, initially to remove materials that affect appearance, then to improve unacceptabletastesandthen to remove contaminants that can cause disease and illness. 1.2 Ceramic Filtration System Fig -1: Ceramic water filtration system Usually, ceramic pot filters are made which is kept above a plastic or clay receptacle. Water to be filtered is poured into the ceramic filter. A lid is provided at top to prevent further contamination of water. The water will flow through the minute pores of the filter into the receptacle placed below. During this path of flow contaminants gets trapped in these nano-micro pores and thus removing bacterial andchemical contaminants. And finally filtered water will reach the receptacle which can be taken out using a plastic faucet placed outside the bottom of the receptacle. 2. METHODOLOGY CWFs are fabricated from a mixture of clay and organic combustible materials (e.g., rice husks or sawdust) also known as burn-out materials. Porous structure of ceramic filter is created as a result of the burn-out during the firing
2.
International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 06 | Jun 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 1323 process. Manufacturing of conventional ceramic filter includes raw material selection and processing, mixing and pressing, drying and firing, as well as quality testing. The clay that was used in this study was obtained from potters. The combustible materials used are sawdust and activated carbon. The sawdust is collected from Sawmill. Activated carbon is prepared from wood charcoal using lime. Both sawdust and activated carbon subjectedtoa 500-μmsieving. Silver coated calcium hydroxyapatite were used as obtained from the suppliers. It consists of a white powder (average particle size of 5μm) of Ca3(PO4)2 having silver coating. 2.1 Processing of Ceramic Water Filters Four ceramic water filters were made froma mixtureofclay, combustible material as sawdust, without silver coated calcium Hydroxyapatite and one filter is made with the addition of silver coated calcium Hydroxyapatite. The sawdust was used as a pore forming agent to trap some contaminants, while hydroxyapatite was used for the substitution of chemical contaminants. Collected clay was crushed into powdered form, which is then mixed with the sawdust in four proportions. Initially, Sieved clay powder and combustible materials were mixed dry and then wetted by adding water, then wedged and rolled into a smooth homogenous mixture. The resulting paste were molded into shape of a pot in a plastic cup. They had an internal base diameter of 90 mm, internal lid diameter of 110 mm, and internal height of 110 mm, with a thickness of 15 mm forthe base and 10 mm for the sides. After pressing, the filterswere air-dried for 8 days and fired for 3-4 hours. The percentage of sawdust which give optimum filtration and mechanical performance is found. 2.2 Characterization of Structure The porosity of the filters was measured by water absorption. Compute the weight of dry filter, . Immerse the filter completely in water for 24 hours. In air after wet- wiping take the wet weight of the filter, . Finally, the mass of the samples was measured under water (i.e., hydrostatic weighing) . Porosity can be calculated as follows: Porosity = Compare the porosities of filters havingdifferentpercentage of sawdust and filter having optimum porosity was found. 2.3 Collection of Contaminated Water Three sampling points havingcontaminatedopenwell water is traced. Collection of water samples were done from each of these sites. Water samples werecollectedfromtheseopen wells using sterile plastic bottles. Containers are filled with water, transported to the laboratory and refrigerated. 2.4 Determination of Hydraulic Performance The hydraulic performance of the samples was determined by water discharge. Usually a receptacle was placed under the ceramic water filters. The massofwaterdischargedfrom the filters to the receptacle was recorded as a function of time. The water discharge was then obtained by dividing the mass of water discharged by the density (1 g/cm3). Finally, the flow rate was regarded as equal to the slope of the curve water discharge as a function of time. The filter having optimum flowrate is found and flowrate of 2 to 3 litre per hour is considered as optimum. 2.5 Determination of Filtration Performance The effectiveness of the developed filterswasdeterminedby carrying out physio-chemical and microbial analysis on raw and the filter-treated water samples. Three localities having contaminated open well drinking water were traced. Water samples were collected from each of these sites. Physiochemical and bacterial analysis before and after filtration were done. The contaminant removal efficiency of the filter was calculated. 3. RESULTS AND DISCUSSION The results show that the developed filters are effective in the treatment of physio-chemical as well as bacterial contaminants detected in the water samples. It can be seen that the removal efficiency increases with increase in percentage of clay content in the filter composition. 3.1 Estimation of porosity and flowrate Table 1 shows the estimated porosity and flowrate of various filters having different sawdustconcentration.Filter C 70 has High porosity (58.3%). This is the resultant of high clay to sawdust ratio. Porosity increases with increase in sawdust content. Filter C 85hasthelowestporosity(38.7%). The flowrate testing result shows a similar pattern as thatof porosity. Filter C 70 has the highest flowrate (2000ml/h) and C 85 has the lowest flowrate (250ml/h). Table -1: Estimated porosity and Flowrate of filters Filter code Clay Sawdust ratio Porosity (%) Flowrate (ml/h) C 70 70 : 30 58.3 2000 C 75 75 : 25 52.5 1200 C 80 80 : 20 46.8 400 C 85 85 : 15 38.7 250 CS 75 75 : 25 54.7 1300
3.
International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 06 | Jun 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 1324 3.2 Filtration Performance In the microbiological analysis, three different raw water samples based on their sources were used. The analysis involved testing for bacterial counts, total coliform andfecal coliform counts. Fig – 2: Total Coliform variation for different sawdust content Fig – 3: Fecal Coliform variation for different sawdust content The results of the open well and borehole samples indicated recontamination in the treated water samples. But based on the initial results, filter C 75 was observed to have given the best treatment with percentage reductions in bacterial counts of up to 70% in the well samples and 80% reduction in the borehole samples. Filter sample C 85 gave a 100% reduction of coliform in the well water samples. For the physio-chemical analysis, three different rawwatersamples based on their sources were used. They were the open well and borehole raw water sources. The results show that all the filtered samples improved iron and nitrate upto 90%. While the filtered samples increased TDS and electrical conductivity. This is due to the leaching of some clay minerals into the sample water. Fig – 3: Turbidity variation for different sawdust content The results show that there is no sufficient variation in the pH value of the samples. While there is 99% reduction in the turbidity content. The turbidity values are less than one for all samples filtered using C 80 and C 85 filters. Fig – 4: Iron variation for different sawdust content The samples preliminary analysis results show that iron content is beyond permissible limit (0.3mg/l). After filtration, the iron content has reduced to a lower value far less than permissible limit. Greater removal of iron hasbeen seen in filters C 80 and C 85. 4. CONCLUSIONS Ceramic water filtration is one of the recent low-cost water treatment methods made from locally available materials, is an affordable, effective, low-maintenance and sustainable technology appropriate for POU household water treatment in developing areas. According to this study the developed ceramic filters have the ability to treat both chemical and microbial contaminants in water. This study is expected to extend the use of ceramic filters in the household by reducing the existing limitations of the ceramic filters to cover the treatment of chemical impurities in water as well as the microbial and thus making it a complete solution to household water treatment needs.
4.
International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 06 | Jun 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 1325 ACKNOWLEDGEMENT I express my heartfelt and sincere gratitude to God the Almighty for allowing the successful completionofthiswork without any disruption. For the project work there were many dedicated and highly qualified persons to help me. I avail this opportunity to express our gratitude and indebtedness to all who directly or indirectly had an impact on me for the project. REFERENCES [1] Alemu Lelago Bulta, Geremew Arega W. Micheal (2019), Evaluation of the efficiency of ceramic filters for water treatment in Kambata Tabaro zone, southern Ethiopia, Environmental system research, 8:1. [2] Dikshant Sharma, Liz Taylor-Edmonds, Robert C. Andrews (2018), Comparative assessment of ceramic media for drinking water biofiltration, Water Research, 128, 1-9. [3] Doris van Halem(2006),Ceramic silverimpregnatedpot filters for household drinking water treatment in developing countries, Master of Science Thesis in Civil Engineering, 1-39. [4] Ebele Erhuanga, Isah Bolaji Kashim, Tolulope Lawrence Akinbogun (2014), Development of Ceramic Filters for Household Water Treatment in Nigeria, Scientific research, Vol.2, No.1, 6-10. [5] Enyew Amare Zereffa, Tesfaye Betela Bekalo (2017), Clay Ceramic Filter for Water Treatment, Materials Science and Applied Chemistry, vol. 34, pp. 69–74. [6] Haiyan Y, Shangping X, Derek E. C, Yin W (2020), Ceramic water filter for point-of-use water treatmentin developing countries: Principles, challenges and opportunities, Frontiers of Environmental Science & Engineering, 14(5): 79. [7] Megan Concannon, Joseph Genga, Pramod Jonwal, Avnish Kumar, Priyanshu Meena, Peter Nash, Mary Sheehan (2018), Designing a Water Filtration Device to Remove Chemical and Biological Contamination in Mandi District, Project submitted to the Faculty of Worcester Polytechnic Institute of the requirementsfor the degree of Bachelor of Science, 1-39. [8] Nigay. P. M, Salifu. A. A, Obayemi. J. D, White. C. E, Soboyejo. W. O (2020), Assessment of Ceramic Water Filters for the Removal of Bacterial, Chemical, and Viral Contaminants, Journal of Environmental Engineering, 146 (7). [9] Tran Thi Ngoc Dung, Lan-Anh Phan Thi, Vu Nang Nam, Tran Thi Nhan, Dang Viet Quang (2019), Preparation of silver nanoparticle-containing ceramic filter by in-situ reduction and application forwaterdisinfection, Journal of environmental chemical engineering, 19, 2213-3437. [10] Vinka A, Oyanedel Craver, James A Smith (2008), Sustainable Colloidal-Silver-ImpregnatedCeramicFilter for Point-of-Use Water Treatment, Environmental Science Technologies, 42, 927-933. [11] Yakub, W. O. Soboyejo (2012), Adhesion of E. coli to silver- or copper-coated porous clay ceramic surfaces, Journal of Applied Physics, 111.
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