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Item In this paper, the nutrient and organics release under continuously accumulating conditions of benthalsludge, the affect of frequency of addition and organic loading rates are analysed and discussed. The rate of organics release decrease with increasing time from start of experiment. The rate of organics release has been lower when the organics loading rate is less, and frequency of addition is more. However, the nutrients release is less when the frequency of addition is lower.(Organics and nutrients contributions by benthalsludges under continuously accumulating conditions) Bhargava, D.S.; Shrihari, S.2000Item Benthal-sludge deposits utilize the oxygen available in the overriding waters, (contacting the sludge deposits) for their bacterial decomposition. The rate of benthal decomposition depends on the availability of decomoposable material and the amount of oxygen being supplied. This paper provides a simple relationship of benthal oxygen demand with time. The rate of benthal degradation decreased with increase in the influent water flow rate.(Kalpana Corporation, Kinetics of benthal sludge stabilization) Bhargava, D.S.; Shrihari, S.2002Item Dissolved iron in drinking water is difficult to remove when present in concentration more than 1.0 mg/L. Adsorption of iron in laterite was tried. The iron removal was about 50% within 15 minutes. The rate of removal decreased considerably after 15 minutes. © Enviromedia.(Adsorption of dissolved iron on laterite) Shrihari, S.; Kiran, S.R.2003Item The present study deals with the treatment of weak domestic wastewater in UASB(up flow anaerobic sludge blanket) reactor system. An experimental reactor, made of PVC tubes, 24 litre capacity was used for the experiment to evaluate the performance of the reactor. The HRT(hydraulic retention time) was maintained as 3 days. The study was carried out for a period of 40 days. The results of the experiment indicate that the anaerobic treatment of domestic wastewater in UASB reactor is a promising technique for tropical countries. © Enviromedia.(Treatment of domestic wastewater by UASB system for tropical countries) Srinikethan, G.; Shrihari, S.; Pradeepan, V.S.2004Item Unscientific methods of disposal of solid waste as landfills on low lying area cause serious environmental geotechnical problems. The leachate generated from the decomposition of solid waste causes the pollution of soil layers. In this study an attempt has been made to investigate the effect of leachate on soil chemical properties by laboratory tests. The tests included the pH, Electrical conductivity, Hardness, Chlorides, Sulphates, Nitrates, Sodium, Potassium, Ammonia, Nitrogen and Phosphate contents of lateritic soil. The results of this study are presented in this paper. Copyright © Enviromedia.(Effect of solid waste leachate on chemical properties of lateritic soil) Bala Murali Krishna, C.; Yaji, R.K.; Shrihari, S.2005Item Laboratory studies were conducted to assess the influence of media related factors such as porosity and pore size and specific surface area on performance of up flow anaerobic biofilters (ABFs). Two simple model of 8 litres capacity up flow anaerobic biofilters (ABFs), one packed with support media granite of size 50 to 40 mm and the other packed with granite of size 25 to 20 mm were installed. The experimental anaerobic biofilters were made of PVC tubes. The hydraulic retention time (HRT) was maintained as 12 hours. The study was carried out for a period of 90 days. The waste treatment performance indicates that the biofilter associated with media of the lesser pore size and porosity with higher specific surface area demonstrated the highest BOD and COD removal 91.03% and 82.50% respectively. Copyright © Enviromedia.(Treatment of domestic wastewater in up flow anaerobic biofilters (using granite as packing material)) Srinikethan, G.; Shrihari, S.; Pradeepan, V.S.2005Item Effect of pH on the geotechnical properties of laterite(2006) Sunil, B.M.; Nayak, S.; Shrihari, S.Environmental Geotechnology has emerged as an interdisciplinary science, aiming and forecasting, analyzing and solving the geotechnical problems involving the influence of environmental factors. Lateritic soil of west coast region of India was studied to investigate the effect of soaking on the engineering properties and chemical characteristics of soil, soaked in different pH solutions (pH = 5.0, pH = 7.0, pH = 8.0). 12 N hydrochloric acid and 15 M ammonia solution were used to monitor the pH of the solution for about ninety days. Results showed that the pH of the solution has strong influence on the chemical characteristics of lateritic soil. The engineering properties of soil are altered when compared with the initial characteristics of the soil. The reason for this observed behavior of the soil is addressed in this paper. © 2006 Elsevier B.V. All rights reserved.Item E-waste management(Gheorghe Asachi Technical University of Iasi, Romania ccti@tuiasi.ro, 2007) Avvannavar, S.M.; Shrihari, S.E-waste is a new term coined in the market of hazardous substances. It has taken a new bourgeoning route since the boom of Information Technology (IT). The problems regarding the transportation, handling and dispose have to be tackled at the earliest as it might cause detrimental effects on environment. Presently in India there is no distinct and lucid regulation(s) regarding e-waste management. There should one stop solution! In the present paper, some of the Technical and E-Management Strategies that can be implemented by adopting 4 R’s policy-reduce, recovery, recycle and reuse are discussed. © 2007, Gheorghe Asachi Technical University of Iasi, Romania. All rights reserved.Item Determination of water quality deterioration at pilgrimage centre along river Netravathi, Mangalore using WQI Approach(Gheorghe Asachi Technical University of Iasi, Romania ccti@tuiasi.ro, 2007) Avvannavar, S.M.; Shrihari, S.An attempt has been made to develop Water Quality Index (WQI), using six water quality parameters at riverside stations located in the vicinity of temples of Dakshina Kannada district, Karnataka, South India. Rating curves were drawn based on the tolerance limits of inland waters and health point of view. Bhargava WQI method and Harmonic Mean WQI method were used to find overall WQI along the stretch of the river basin. Five point rating scale was used to classify water quality in each of the study areas. It was found that the water quality of Netravathi varied from Excellent to Marginal range by Bhargava WQI method and Excellent to Poor range by Harmonic Mean WQI method. It was observed that the impact of human activity was severe on most of the parameters. The MPN values exceeded the tolerable limits at almost all the stations. It was observed that the main cause of deterioration in water quality was due to the lack of proper sanitation, unprotected river sites and high anthropogenic activities. © 2007, Gheorghe Asachi Technical University of Iasi, Romania. All rights reserved.