Pavai Engineering College

Nāmakkal, India

Pavai Engineering College

Nāmakkal, India

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Sekaran V.,Pavai Engineering College
Nature Environment and Pollution Technology | Year: 2015

Dairy industry contributes to the pollution of the environment, both in quality and quantity. It generates about 0.2 to 10 L of effluent per liter of milk processed. Up-flow anaerobic sludge blanket is most suitable for biodegradable wastes, hence the present study evaluated the performance of UASBR through a laboratory model (25 liters of volume) for treating the dairy effluent with maintained psychrophilic temperature (15-20°C) at phase I and mesophilic temperature (30-40°C) at phase II. This model was studied for its treatment efficiency in terms of COD reduction. In the phase I, the average varying influent COD applied over the model are 1684, 2693, 3160, 3637, and 4059 mg/L with flow rates for each average influent COD as 4.80, 9.60, 14.40, 19.20 and 24.00 L/d. It was found that, successful COD removal of 91.42% was for the operating conditions of OLR at 0.039 kg COD/kg VSS day, VLR at 0.70 kg COD/m3 day and HRT at 5.21 days. In the phase II the average varying influent COD of 2316, 2827, 3329, 3908 and 4522 mg/L were applied with same flow rates. The experimental work on UASBR model was found successful with 94.70% COD removal under the operating conditions of OLR at 0.037 kg COD/kg VSS day, VLR at 0.630 kg COD/m3day and HRT at 5.21 days. The reactor achieved BOD, TSS, TDS, N and P removal efficiency, observed in phase I and II, as 91%, 82%, 89%, 42% and 46% and 96.4%, 86%, 91%, 41% and 50% respectively. © 2015, Technoscience Publications. All rights reserved.


Ramasamy V.,Annamalai University | Rajkumar P.,Pavai Engineering College | Meenakshisundaram V.,Bhabha Atomic Research Center | Ponnusamy V.,Anna University
Carpathian Journal of Earth and Environmental Sciences | Year: 2011

Gamma radiation measurements were performed using high resolution HpGe detector for sediment (sand) samples collected from various sites of Vellar River, Tamilnadu. The concentration and distribution of 238U, 232Th and 40K were investigated with an aim of an evaluating radiation hazards to mankind, when it is used for building construction. The mean activity concentration values for 238U, 232Th and 40K were found to be 15.14±1.75 Bqkg-1, 29.76±4.49 Bqkg-1 and 135.05±16.03 Bqkg-1 respectively. These values are fall within range of typical world values. To assess the radiological hazards of river sediments, the absorbed and observed dose rate, annual effective dose (outdoor and indoor) equivalence, radium equivalence (Raeq), radiation heat production (RHP) rate, hazard indices (Hex and Hin) and gamma index are calculated. The radiological hazard indices are below the internationally recommended values. Thus, sediments of Vellar River do not pose a significant radiological threat to the population when it is used for construction of buildings.


Sekaran V.,Pavai Engineering College
Indian Journal of Environmental Protection | Year: 2015

Among all the biodegradable waste streams brewery waste is one of the high biodegradable waste stream with BOD in the range of 2500 to 3500 mg/L and COD from 4600 to 7000 mg/ L. While envisaging in conventional biological treatment process the brewery waste stream suffers substrate inhibition. Upflow anaerobic sludge blanket reactor (UASBR) is a versatile, proven, high rate anaerobic reactor. The substances of the sludge blanket which is more dependent on the biodegradability and nutrients offers an edge for treating highly biodegradable waste stream, such as brewery. The present study evaluated the performance of UASBR through a laboratory model (25 L of effective volume) for treating the brewery effluent in mesophilic temperature (30-35°C). This model was studied its treatment efficiency in terms of COD reduction. The experiment was conducted for average varying influent COD 3442.46, 4321.10, 4815.40, 5558.00 and 6157.60 mg/L. The flow rates of the experiments are 4.80, 9.60, 14.40, 19.20 and 24.00 L/d, respectively. The experimental work on UASBR model is found to be successful with % COD removal from 91.22 % for the operating conditions of OLR at 0.0450 kg COD/kg VSS. Day, VLR at'0.935 kg COD/m3 day and HRT at 5.21 days. © 2015 - Kalpana Corporation.


Sekaran V.,Pavai Engineering College
International Journal of Applied Engineering Research | Year: 2014

Sugar industry waste water was treated in a laboratory model UASB reactor seeded with domestic waste water collected from septic tank sludge. Two different studies were carried out at Phase I: maintained psicrophilic temperature (20-28℃) condition during October –November and Phase II: maintained mesophilic temperature (30-40℃) condition during April to June for COD reduction. In the phase I, the average varying influent COD applied over the model are 2114,2543,3341,4028 and 4520 mg/l with flow rates for each average influent COD are 4.80, 9.60, 14.40, 19.20 and 24.00 l/d. It was found successful with 84.06% COD removal under the operating conditions of OLR at 0.034 kg COD/kg VSS day, VLR at 0.760 kg COD/m3 day and HRT at 5.21 days. In the phase II the average varying influent COD of 2065, 2508, 3332, 4033 and 4512mg/l were applied with same flow rates. The experimental work on UASBR model is found successful with 91.86% COD removal under the operating conditions of OLR at 0.031 kg COD/kg VSS day, VLR at 0.764 kg COD/m3day and HRT at 5.21 days. © Research India Publications.


Meenakumari R.,Kongu Engineering College | Subasri R.,Kongu Engineering College | Jayamani S.,Pavai Engineering College | Kamaraj N.,Thiagarajar College of Engineering
IEEM2010 - IEEE International Conference on Industrial Engineering and Engineering Management | Year: 2010

This paper investigates the possibilities for the improvement in the operational performance of 29 state owned electric utilities in India on region wise, using Data Envelopment Analysis based (DEA). The producti vity of any firm is measured by the quantity of output produced per unit of input. Malmquist Productivity Index (MPI) for a two year period of 2003-04 and 2005-06. Two different models viz., the CCR DEA model and the BCC DEA model are applied to evaluate the performance. DEA based Malmquist Producti vity Index (MPI) is decomposed as technical efficiency change and technology change to witness the growth of the SEOU's. The result of MPI identifies the potential of various parameters for the change with regard to technical efficiency and technology. ©2010 IEEE.

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