Time filter

Source Type

Nāgpur, India

Gawande S.P.,G.H. Raisoni College of Engineering | Porate K.B.,G.H. Raisoni College of Engineering | Thakre K.L.,VNIT | Bodhe G.L.,NEERI
Proceedings - 3rd International Conference on Emerging Trends in Engineering and Technology, ICETET 2010 | Year: 2010

Power demand increases continuously and it is not economical and reliable to fulfill the demand by thermal based generation methods. To overcome the problems of thermal based generation ,use of non-conventional sources increases very rapidly. These sources are pollution free and economical but creating the problems while synchronization with synchronous generator. Compensating devices like STATCOM are suggested for the issue of stability and synchronization. This paper deals with the combine working by simulation method of oil based synchronous generator and induction generator based micro hydro plant located at remote places. The main objectives of this paper are to control voltage and frequency for variable load. The Simulink model is developed to perform the transient analysis of the proposed scheme. © 2010 IEEE. Source

Gopalakrishna K.,Indian Institute of Technology Madras | Shashikala M.,NEERI
6th International Conference on Environmental Informatics, ISEIS 2007 | Year: 2014

In India the sago producing industries are located mainly in the southern region. The waste water from Sago industries is complex and highly organic. It is noted as a significant contributor of pollution it needs organized treatment. The conventional treatment technologies require large space, power intensive and requires skilled monitoring. Hence the Industries are looking for compact, efficient and cost effective treatment options. One of the most advanced option is fluidized bed bio-reactor, where the biomass is cultured on small media kept fluidized in the rector. It has the advantages of both the attached and suspended growth systems. In order to improve the efficiency, reduce the number of media and overall space and cost, studies were done on a hybrid reactor using polypropylene media. The hybrid reactor is a combination of Activated sludge and FBBR. The efficiency for organics removal, nitrification suspended solids removal. For various initial parameters was studied. The study has indicated the hybrid reactor as highly efficient for treatment of strong sago waste water. For organic loading rate of 2.1 to 10.19 kg COD/cum/day the efficiency varied from 95% to 45%. Microbiological studies of the biofloc were also conducted and reported. Source

Mahapatra K.,Rashtrasant Tukadoji Maharaj Nagpur University | Ramteke D.S.,NEERI | Paliwal L.J.,Rashtrasant Tukadoji Maharaj Nagpur University
Journal of Analytical and Applied Pyrolysis | Year: 2012

The present work aims to conduct a process optimization for the production of activated carbon from sludge of food processing industry. The significant feature of this sludge based activated carbon that makes it unique and economic is that it can be produced from waste material. The carbonaceous nature of this sludge does not allow its direct disposal to land because of excess organic and nutrient load contents, however, can be converted to a value added product. This process not only eliminates the need for further treatment of sludge but also reduce the cost of its handling, land filling, and transportation as well as the utilization in the same industry in the purification system. In the present work, activated carbon produced from pyrolysis of sludge was chemically activated by various activating agents. Optimization of impregnation ratio, impregnation time, activation temperature, and activation time was studied. The product was characterized through its iodine value and yield percentage. It was observed that the product had maximum iodine value of 624 mg g -1 with ZnCl 2 as an activating agent. The FT-IR analysis depicts the presence of a variety of functional groups attached on the surface of activated carbon which are used in the interaction with the adsorbate during the process of adsorption. The XRD analysis reveals that the produced activated carbon has low content of inorganic constituents compared with the precursor. The product formed was applied for methylene blue adsorption. The adsorption equilibrium of methylene blue dye was examined at room temperature. Adsorption isotherm was drawn by applying Langmuir and Freundlich models fitting the data indict, with an adsorption capacity of 23.6 mg g -1 and 14.2 mg g -1, respectively. The data show that methylene blue adsorption is best suited to Langmuir equation. © 2012 Elsevier B.V. All rights reserved. Source

Mandal D.,NEERI | Labhasetwar P.,Indian National Environmental Engineering Research Institute | Dhone S.,NEERI | Dubey A.S.,NEERI | And 2 more authors.
Resources, Conservation and Recycling | Year: 2011

In India, the per capita water availability is reducing day by day due to rapid growth in population and increasing water demand. Greywater treatment and reuse is one of the feasible options in developing countries like India to overcome this problem. A greywater collection, treatment and reuse system was designed and implemented in an urban household having a water requirement of 165 liter per capita per day (lpcd) and a greywater generation rate of 80 lpcd. An upflow-downflow greywater treatment plant having a screening, sedimentation, filtration and disinfection as major treatment processes was constructed and treated greywater is used for toilet flushing and to irrigate the vegetables in the backyard of the household. Greywater characterisation indicates that COD and BOD are sufficiently reduced during the treatment and there is also substantially reduction in Escherichia coli count. The payback period of this greywater treatment and reuse system is estimated to be 1.6 year. © 2010 Elsevier B.V. Source

Shinde K.N.,Ns Science And Arts College | Nagpure I.M.,University of the Free State | Fulke A.B.,NEERI | Dhoble S.J.,Rashtrasant Tukadoji Maharaj Nagpur University
Luminescence | Year: 2011

An intense green luminescent Na 2Ca(PO 4)F:Mn 2+ phosphor has been prepared at high temperature by reduction treatment in a charcoal environment. The emission band of Mn 2+ was obtained at around 522 nm (green) under 259 nm excitation. Enhancement in emission intensity arising from the thermal treatment is reported. The intense emission of the spectrum was assigned to electronic transitions 4T 1 → 6A 1 of Mn 2+ ions. Intense PL emission suggested that temperature employed plays an important role in the present matrix. X-ray diffraction pattern, photoluminescence and morphology by SEM of the host lattice of phosphors at different temperatures have been reported in this paper. The results obtained show that the present phosphor has potential for application in green emitting phosphors for the lamp industry. © 2010 John Wiley & Sons, Ltd. Source

Discover hidden collaborations