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Installation of Horizontal Roughing filter/slow sand filter under Community Rain water harvesting project :


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 Horizontal Roughing Filter (HRF) is a pretreatment technology. HRF copies natural purification process. In HRF water runs in horizontal direction. This usually consists of differently sized relatively coarse filter material (ranging from 20 to 4mm) which successively decrease in size to treat highly turbid (300-400 NTU or even 1000 NTU for shorter duration) surface water over prolonged period. Sedimentation is the main solid separation process. It mainly reduces the fine solids efficiently and partly Suspended solid impurities from raw water. Bacteriological water quality improvement is also observed to a great extent. The resulting water quality from HRF found suitable for charging SSF. This also improves the performance of SSF which also helps in increasing the rate of filtration without affecting the water quality, ultimately resulting in economy. In HRF, the filtration rate ranges between 0.3 to 1.5 m/ hr. Length of filter is dependent on raw water turbidity. Filter cleaning is also carried out with hydraulic filter flush or in manual process which helps in periodical removal of accumulated solids from filter media. Cleaning of filter media plays key role in long term and efficient roughing filter operation. Turbidity reduction can be achieved to the extent of 70-90 per cent and even in some cases up to 98 per cent, depending upon raw water characteristics. HRF is simple in construction, using locally available material and skills for operation. Neither mechanical parts nor chemicals are necessary for HRF, Where as SLOW SAND FILTERS (SSF) is find global application specifically in small community water supply schemes in developing countries, due to its added advantages of most qualitative, cost effective, simplest and reliable technology, which require limited professional skill and easy maintenance. SSF require few technical component and usually no chemicals. The performance of SSF is not controlled by mechanical system but by ecosystem of living organism..  Considering the scarcity of safe drinking water in the area, Association for Development of Human and Community Rebuilding (ADHAR) has initiated to introduce community rain water harvesting structure with the help of Gram Panchayat and successfully identified a few community ponds where salinity in storage water is very less and local people generally use that water for drinking, cocking and other domestic purpose. Based upon the findings ADHAR introduced Horizontal Roughing Filter / Slow sand Filter   (HRF/SSF) and involved Gram Panchayat for renovation of identified ponds where rain water can be stored. Accordingly Gram Panchayat under took the renovation work under MGNREGS programme and ensured that the ponds should not be contaminated by any manner. Association for Development of Human and Community Re-building has constructed 4 unit of HRF/SSF in 4 villages of 2 Gram Panchayat. The project was designed on participatory method where PRI authority, users group, community leaders are involved physically and financially with implementing agency to carry out people centered program for its sustainability.   

 

 ECOSAN TOILET

 An innovative initiative from ADHARSanitation is most neglected subject from all concern in Sundarban region. Association for Development of Human and Community Rebuilding (ADHAR) has initiated its water and sanitation project since 2008 in the revenue village Kalitala of Hingalganj Block and selected a part of revenue village namely Dakshin Kalitala for its pilot project on Ecological sanitation (dry pit latrine). The village is having a household of 592 consisting of 2895 population, Out of total household 201 doesn’t have any toilet and 42 households having very poor toilet facility, which is not usable. Circumstances compelled People for open defecation. Although, rest 80 household having toilet which is short depth conventional type. As entire Sundarban belongs to high water table zone, there is every possibility for water contamination. The existing water bodies where from people collect water for their domestic use is also likely to be contaminated, which people forced to consume.To prevent water contamination and maintaining hygienic environment ADHAR (Association for Development of Human and Community Rebuilding) has been introduced individual household ECO San toilet with the support from Wherever the Need, U.K and active guidance of Mr. S. Paramasivan, Country Director, Wherever the Need,Indiaservices. Though, this is a new concept introducing in this area, which needs to be oriented to the practitioner through training and orientation with the ground reality. We have already imparting hygienic orientation involving school children, Community leaders and local self-government institutions. Alternate to conventional toilets are on the realization.  The project was formulated to seek better participation and involvement of users’ community in a forward sustainable maintenance and its effective use by the community. Accordingly, project implemented keeping in view of their affordable means of their participation to execute the project 

 

Community sanitary Block 

Association for Development of Human and Community Rebuilding (ADHAR) has constructed one unit Community Sanitary Block as a pilot project towards protecting of Community pond where Horizontal Roughing Filter / Slow Sand Filter installed. Users themselves resolved that the pond strictly maintain for drinking water purpose. Hence, ADHAR has constructed above facility at Malakanghumti hatkhola village (besideRamakrishnaHigh School). The Sanitary block was designed and funded by Wherever the Need India Services,Pondicherryand constructed with the active guidance of Mr. S. Paramasivan, Country Director.  The provision having two separate block i.e. one for men and another for women. Each portion consist a provision of two ECOSAN toilets, two Bathrooms and one wash area. Both the sections have provision of hand pump fitted /connected with the pond for incessant water supply and safe outlet which can not be polluting the protected pond. 

 

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