and higher cost" options for most of the fluoride-endemic nations. This is followed by a chapter on water quality testing for defluoridation plants. ods for defluoridation of drinking water. © 1993 Current Science Association However, all these techniques had certain limitations. Current Science is a fortnightly journal published since 1932 by the Current Science Association, Bangalore (India) in collaboration with the Indian Academy of Sciences. To access this article, please. The removal of fluoride from water using defluoridation techniques is a common practice worldwide, both domestically and industrially. The main activity of the Association is publication of a fortnightly multidisciplinary journal. Wondimagegn, Agegnehu Alemu. The membrane processes assure good quality water, but are "higher technol. Application of defluoridation plants for rural water supply in North Gujarat (India). As an important outcome of this programme it was concluded that the Nalgonda Technique is preferable at all levels because of the low price and ease of handling (Bulusu et al 1979). This item is part of JSTOR collection Current Science Application: Safe drinking water with fluoride content within permissible limits of 1.5 mg/L for domestic and community use. Safe drinking water with fluoride content within permissible limits of 1.5 mg/L for domestic and community use. The Nalgonda Technique has been introduced in Indian vil-lages and studied at pilot scale in e.g. With a personal account, you can read up to 100 articles each month for free. March 1995. 400 Community level, cap 400 m3 : Rs. Defluoridation of water by a one step modification of the Nalgonda technique or (alternative link). Domestic level, cap 25 L/batch: Rs. The journal covers all branches of pure/applied science and technology such as physics, chemistry, life sciences, medicine, earth sciences, engineering and technology. Defluoridation is referred to as a downward adjustment of fluoride levels in drinking water. Defluoridation of water by the Nalgonda technique is a commonly used household process in areas of endemic fluorosis in villages around Nalgonda (Andhra Pradesh, India). The Association is registered as a Society in India under the Societies Registration Act. Nalgonda technique is a combination of several unit operations and the process invloves rapid mixing, chemical interaction, floculation, sedimentation, filtration, disinfection and sludge concentration to recover waters and aluminium salts. WATER DEFLUORIDATION: NALGONDA TECHNIQUE; Detail: Product: Process for removal of excess fluoride in ground water by using Nalgonda technique. Special Sections are also published on diverse and topical themes and this has served as a platform for scientific fraternity to get their work acknowledged and highlighted. Kenya, Senegal and (विज्ञान एवं प्रौद्योगिकी मंत्रालय, भारत सरकार), Ministry of Science & Technology, Govt. JSTOR is part of ITHAKA, a not-for-profit organization helping the academic community use digital technologies to preserve the scholarly record and to advance research and teaching in sustainable ways. 5 lakh. ©2000-2020 ITHAKA. For community level, fill-and-draw type plants are used with capacity up to 400 m3/day. The aim of this paper was to modify the existing well-known procedure minimally and without much change in the cost to bring about a greater removal of fluoride. High fluoride raw water, alum, lime, bleaching powder. Master of Science thesis by R A Jethwa. For terms and use, please refer to our Terms and Conditions The domestic level treatment is performed in a bucket or any plastic container. The Nalgonda technique involves the addition of alum, lime and bleaching powder followed by rapid mixing, flocculation, sedimentation, filtration and disinfection. Published By: Current Science Association, Read Online (Free) relies on page scans, which are not currently available to screen readers. Defluoridation of potable water by Nalgonda technique W. G. Nawlakhe and R. Paramasivam Fluoride, although beneficial when present in concentrations of 0.8-1.0 mg/l, has been associated with mottled enamel of teeth when present in potable waters in excess … All Rights Reserved. Request Permissions. FC/RCC setting tank, flash mix and pump, flocculator, rapid gravity sand filter and disinfection unit. Feature: Excess fluoride in drinking water causes dental and skeletal fluorosis.
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