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Drinking water quality monitoring and surveillance for safe water supply in Gangtok, India(Environment Monitoring and Assessment)
(G. K. Khadse, M. Kalita, S.N. Pimpalkar, P. K. Labhsetwar,78,,401–414,Year : 2011)
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To ascertain the quality of drinking water being supplied, water quality monitoring and surveillance was conducted in Gangtok city at various treatment stages, service reservoirs, distribution network, public standposts, and households. No significant change in raw water quality was observed on day-to-day basis. Residual chlorine was found in the range of nil to 0.2 mg/l in the sump water/finished water. Throughout the year (i.e., during summer, winter, and monsoon seasons), the total coliform and fecal coliform counts were ranged from nil to 7 CFU/100 ml and nil to 3 CFU/100 ml, respectively, in sump water of Selep and VIP complex water treatment plant; however, at consumer end, those were observed as nil to 210 CFU/100 ml and nil to 90 CFU/100 ml,respectively. These variations in bacterial counts among the different service reservoirs and consumer ends may be attributed to the general management practices for maintenance of service reservoirs and the possibility of enroute contamination. Evaluation of the raw water quality indicates that the water is suitable for drinking after conventional treatment followed by disinfection. The finished water quality meets the level of standards described as per Bureau of Indian Standard specifications (BIS:10500 1991) for potability in terms of its physicochemical characteristics.
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Change in drinking water quality from source to point-of-use and storage: a case study from Guwahati, India(Environment Monitoring and Assessment)
(G.K. Khadse, M. Kalita and P. K. Labhsetwar,184(9),,5343-61,Year : 2011)
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No information is available
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Air quality of respirable particulate levels at selected traffic junctions along the section of lateral highway in Hyderabad(Indain Journal of Environmental Protection)
(Manda Karunakar Reddy, Mareddy Sumathi,662-667,,662-667,Year : 2011)
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The aerodynamic diameter of an air borne particle is the key property in determining its respiratory deposition. The study aim to assess PM2.5 level and its size distribution at 5 traffic junctions located along the lateral highway connected to NH-202. A cascade impactor has been used to measure the size function range of PM2.5 apart from PM10 of atmospheric dust particles in air being PM2.5 is concern with respect to effect on human health and is able to tend deeply into the respiratory tract reaching the lungs. It is observed that weight % of PM2.5 values are in the range of 40% - 60% of PM10 and few values of PM2.5 are exceeding the standards prescribed by CPCB. It is concluded that free flow of traffic is main concern and maintenance of road should be carried out during low traffic hours.
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Ambient Air Non-Methane Volatile Organic Compound (NMVOC) Study Initiatives in India ? A Review
(Amrita Talapatra, Anjali Srivastava,Vol.:2(1),,p.21-36,Year : 2011)
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No information is available
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Studies on chromate removal by chromium-resistance Bacillus sp. Isolated from tannery effluent( Journal of Environmental Protection )
(Chaturvedi, M.K,2,,p. 76-82.,Year : 2011)
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No information is available
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Studies of ambient air quality at municipal solid waste composting plant in Delhi, India(Waste Management)
(Mandal, P., Prakash, M., Chaturvedi, M.K., Gupta, R.K., Bassin, J.K.,31,,p. 2363-2364,Year : 2011)
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No information is available
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Statistical assessment of seafront and beach water quality of Mumbai, India(Water Science and Technology)
(Ritesh Vijay,S. Kamble, S. S. Dhage, R. A. Sohony, S. R. Wate ,64,5, 1186-1193,Year : 2011)
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The water quality of seafronts and beaches of Mumbai is under pressure and deteriorating due to discharge of partially treated sewage and wastewater through point and nonpoint sources. The objective of the study was to assess the water quality and to correlate physico-chemical and bacteriological parameters for establishing relationship, association and dependence on each other. The water quality parameters were selected as per SW II standards specified by Central Pollution Control Board, India and nutrient parameters as strong indicators of sewage pollution. Box and whisker plots were generated for evaluating spatio temporal variation of water quality which suggest influence of organic pollution mostly at Mahim and Dadar in the form of outliers and extremes. Pearson's correlations were estimated between parameters and found significant correlation with each other indicating influence of sewage on water quality. The water quality of beaches and seafronts were found unsafe for recreational purposes. Th
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Determination of processes affecting groundwater quality in the coastal aquifer beneath Puri City, India: a multivariate statistical approach(Water Science and Technology)
(P. K. Mohapatra, Ritesh Vijay, P. R. Pujari, S. K. Sundaray, B. P. Mohanty ,64,4,809 - 817,Year : 2011)
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Variability of groundwater quality parameters is linked to various processes such as weathering, organic matter degradation, aerobic respiration, iron reduction, mineral dissolution and precipitation, cation exchange and mixing of salt water with fresh water. Multivariate statistical analyses such as principal component analysis (PCA) and hierarchical cluster analysis (HCA) were applied to the standardized data set of eleven groundwater quality parameters (i.e. pH, Ca2+, Mg2+, Na+, K+, Fe3+, alkalinity, NO3-, Cl-, SO4(2-), TDS) collected during the post-monsoon and the summer seasons in order to elicit hydrologic and biogeochemical processes affecting water quality in the unconfined aquifer beneath Puri city in eastern India. The application of PCA resulted in four factors explaining 73% variance in post-monsoon and 81% variance in summer. The HCA using Ward's method and squared Euclidean distance measure classified the parameters into four clusters based on their similarities. PCA and HCA allowed interpretation of processes. During both post-monsoon and summer seasons, anthropogenic pollution and organic matter degradation/Fe(III) reduction were found dominant due to contribution from on-site sanitation in septic tanks and soak pits in the city. Cation exchange and mineral precipitation were possible causes for increase in Na+ and decrease in Ca2+ concentration in summer. Fresh water recharge during monsoon and Sea water intrusion in summer are attributed as significant hydrologic processes to variations of the groundwater quality at the study site.
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Spatio-temporal assessment of groundwater level and quality in urban coastal city Puri, India(Water Science and Technology: Water Supply)
(Ritesh Vijay, S. S. Ramya, P. R. Pujari, and P. K. Mohapatra,11,2,194-201,Year : 2011)
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Puri city is situated on the shoreline of Bay of Bengal and groundwater is the only source available to meet the city water supply mainly from two demarcated water fields. Due to the anthropogenic activities and absence of sewerage system, groundwater quality is deteriorating through open discharges of domestic waste, open defecation, septic tanks, soak pits, contaminated water pools, unorganized waste dumping etc. The objective of the paper was to assess seasonal groundwater fluctuation and water quality in terms of physcio-chemical and bacteriological parameters. For this, groundwater levels were measured and samples were collected during post-monsoon (November 2006) and pre-monsoon (June 2007) from the water fields and city area. Groundwater quality was
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Assessment of water quality using cluster analysis in coastal region of Mumbai, India(Environmental Monitoring and Assessment)
(Swapnil R Kamble Ritesh Vijay,178,1-17,321-332,Year : 2011)
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The coastal water quality of Mumbai is deteriorating due to various point and non-point wastewater sources. Hence, it is desirable to monitor coastal water quality for various water-related activities like bathing, contact water sports, recreation, and commercial fishing. The objective of this paper is to assess the seasonal water quality on the basis of seawater standards. Based on water-quality analysis of 17 seafronts and beaches, most of the parameters were exceeding the standards. The statistical cluster analysis was carried out for evaluating impact of wastewater and sewage discharges. The hierarchical cluster analysis resulted into three clustered groups, namely less polluted, moderately polluted, and highly polluted sites with similar characteristics of water quality. Mahim was found to be worst-affected beach due to incoming organi
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Assessment of groundwater quality in Puri city, India: An impact of anthropogenic activities(Environmental Monitoring and Assessment)
(Ritesh Vijay, Puja Khobragade P. K. Mohapatra,177,1-4,409-418,Year : 2011)
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Puri City is situated on the east coast of India and receives water supply only from the groundwater sources demarcated as water fields. The objective of this paper is to assess and evaluate the groundwater quality due to impact of anthropogenic activities in the city. Groundwater samples were collected from the water fields, hand pumps, open wells, and open water bodies during post-monsoon 2006 and summer 2007. Groundwater quality was evaluated with drinking water standards as prescribed by Bureau of Indian Standards and Environmental Protection Agency to assess the suitability. The study indicated seasonal variation of water-quality parameters within the water fields and city area. Groundwater in the water fiel
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Monitoring changes in land use land cover of Yamuna riverbed in Delhi: a multi-temporal analysis
(R. Joshi, M. Warthe, S. harad Dwivedi, Ritesh Vijay T. Chakrabarti,,,,Year : 2011)
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Impact of anthropogenic activities has led to significant changes in riverbeds over a period of time. The objective of the study was to monitor the land use land cover (LULC) of Yamuna riverbed in Delhi and to assess the changes due to natural and anthropogenic activities. The maximum likelihood classification was carried out by using March 1977, April 1999, April 2002 and February 2009 imageries. An overall accuracy of LULC classification of 2009 imagery was around 88.6% based on ground truth data. A significant reduction in the main river course and increase in agricultural activities as well as built up were observed in remote sensing analysis as an outcome
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Fluctuation of groundwater in an urban coastal city of India: a GIS based approach(Hydrological Processes)
(Ritesh Vijay, Abhinav Sharma, S. S. Ramya and Apurba Gupta,25,,1479-1485,Year : 2011)
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Groundwater is the most important and valuable natural resources especially in coastal urban environment where surface water is insufficient to satisfy the water requirement. Puri city is located on the east coast of India where groundwater is the only source available to meet city water supply. As the city is situated on the sandy aquifer, quality of groundwater is deteriorating because of anthropogenic activities, lack of sewerage system, etc. The objective of the study was to assess the groundwater fluctuation during post-monsoon and summer with respect to hydrogeological conditions, topography, and groundwater consumption pattern of the city. For this assessment and analysis, Geographic Information System (GIS) was used to visualize topography of the area through digital elevation model (DEM) and distribution of groundwater contours spatially and temporally. The probable areas prone to contamination were identified based on aquifer property and depths to water table below ground. Copyright © 2010 John Wiley & Sons, Ltd.
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Assessment of Assimilative Capacity of Kanhan River Stretch Using Mike-11 Modeling Tool( Journal of Environmental Engineering and Science)
(V.V. Gedam, P.S. Kelkar, R.K. Jha, G.K. Khadse, P.K. Labhasetwar,,,,Year : 2011)
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No information is available
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GIS based identification and assessment of groundwater quality potential zones in Puri city, India(Journal of Water Resource and Protection)
(Ritesh Vijay, Dipak Ranjan Samal and Prasantha Kumar Mohopatra,3,6,340-347,Year : 2011)
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Puri city is situated on the east coast of India and groundwater is the only source available to meet the potable water supply of the city. The objective of the study was to assess the impact of anthropogenic activities on groundwater quality and to identify the groundwater potential zones for drinking water production using GIS. Major sources of groundwater contamination in the city were open discharges of domestic sewage, inadequate sewerage system, open defecation, septic tanks, soak pits, contaminated water pools and unorganized solid waste dumping. Groundwater samples were collected and analyzed during post and pre monsoon to evaluate the drinking water quality as per Indian standards. The groundwater zones were prepared based on weighted index overlay analysis by assigning the weights based on the drinking water standards under different classes of individual water quality parameters. Finally, the potential zones were identified and assessed as suitable, moderately suitable and unsuitable for domestic purpose. Based on groundwater quality and geospatial analysis, measures were suggested to protect groundwater resources.
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FAHP ranking and selection of pretreatment module for membrane separation processes in textile cluster(Bioresource Technology)
(Pravin Manekar, Tapas Nandy, Abha Sargaonkar, Barkha Rathi, Manikavasagam Karthik,102,2,558- 566,Year : 2011)
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Recent development in membrane manufacturing and extensive application of membranes in effluent treatment has opened up a new water resource. The effluent pretreatment module plays a critical role in membrane performance. Appropriate selection of conventional and advanced pretreatment modules in membrane separation processes (MSP) is significant to the success of zero effluent discharge (ZED). This study addresses performance assessment of eight conventional and advanced pretreatment modules implemented for wastewater management in a textile cluster in South India. The comparative pollutant reduction, capital, operation and maintenance (OM) cost of pretreatment modules are discussed. The ranking and interdependence of the pretreatment modules were analyzed through fuzzy analytical hierarchy process (FAHP) with MATLAB software.
The pretreatment module IV ranked third with a composite weight of 15.46%. The integrated study of performance assessment and FAHP resulted in an optimum pretreatment module IV comprising the sequence of chemical precipitation, bio-oxidation processes (activated sludge processes) followed by chemical precipitation, to achieve the ZED. This study provides a techno-economically feasible solution for selection of an effective pretreatment module for MSP in the textile cluster.
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Novel two stage bio-oxidation and chlorination process for high strength hazardous coal carbonization effluent(Journal of Hazardous Materials)
(Pravin Manekar, Rima Biswas, Manikavasagam Karthik, Tapas Nandy,189,1-2,92-99,Year : 2011)
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Effluent generated from coal carbonization to coke was characterized with high organic content, phenols, ammonium nitrogen, and cyanides. A full scale effluent treatment plant (ETP) working on the principle of single stage carbon–nitrogen bio-oxidation process (SSCNBP) revealed competition between heterotrophic and autotrophic bacteria in the bio-degradation and nitrification process. The effluent was pretreated in a stripper and further combined with other streams to treat in the SSCNBP. Laboratory studies were carried on process and stripped effluents in a bench scale model of ammonia stripper and a two stage bio-oxidation process. The free ammonia removal efficiency of stripper was in the range 70–89%. Bench scale studies of the two stage bio-oxidation process achieved a carbon–nitrogen reduction at 6 days hydraulic retention time (HRT) operating in an extended aeration mode. This paper addresses the studies on selection of a treatment process for removal of organic matter, phenols, cyanide and ammonia nitrogen. The treatment scheme comprising ammonia stripping (pretreatment) followed by the two stage bio-oxidation and chlorination process met the Indian Standards for discharge into Inland Surface Waters. This treatment process package offers a techno-economically viable treatment scheme to neuter hazardous effluent generated from coal carbonization process.
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A feasibility analysis of hydrogen delivery system using liquid organic hydrides(International journal of hydrogen energy)
(AU Pradhan, A Shukla, JV Pande, S Karmarkar, RB Biniwale,36 (1), ,,680-688,Year : 2011)
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No information is available
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Development of GIS based noise simulation model: A case study of Mumbai India Development of GIS-NSM(Multimedia Technology (ICMT), 2011 International Conference on)
(A Sharma, R Vijay, R Sohony,,,3925-3927,Year : 2011)
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No information is available
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Integrated hydro chemical and geophysical studies for assessment of groundwater pollution in basaltic settings in central India(Int. Journal of Environmental Monitoring and Assessment)
( Paras R. Pujari, C.Padmakar, L.SuriNaidu, V.U.Vaijnath, Bhusan Kachawe, V.V.S.Gurunatha.Rao and P.K.Labhasetwar ,,,,Year : 2011)
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No information is available
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