http://nopr.niscpr.res.in/handle/123456789/35148 Thu, 08 Oct 2026 23:16:13 GMT 2026-10-08T23:16:13Z http://nopr.niscpr.res.in/handle/123456789/35157 Title: RSM Studies on Phenol Removal from Aqueous Solution and Removal of Phenolic Compounds from Industrial Effluents by Ionic Liquid [Bmim][BF4]Dissolved in Tributyl Phosphate Authors: Lakshmi, A B; Remy, R; Balasubramanian, A; Venkatesan, S Abstract: Response surface methodology (RSM) was employed to optimize the removal of phenol from aqueous solution by ionic liquid [Bmim][BF4] dissolved in TBP. Central Composite Design (CCD) with four variables (aqueous phase pH, agitation speed, feed concentration, treat ratio) was applied to optimize the extraction process. The optimized conditions for maximum removal of phenol were pH - 6, agitation speed - 350 rpm, feed phase concentration - 10 ppm and treat ratio - 5 respectively. The optimized response for removal of phenol was found to be 98.88 % and the experimental result was found to be 98%. This shows the best fit with the proposed statistical model for phenol removal (R2=0.983). Extraction studies were performed for the removal of phenol, p-chlorophenol (p-CP), 2, 4-dichlorophenol (2,4-DCP) and 2,4,6-trichlorophenol (2,4,6-TCP) from synthetic phenolic mixtures, power plant effluent and textile effluent using [Bmim][BF4] in TBP. The results showed that the percentage extraction of phenols from synthetic mixtures and industrial effluents were found to be 98%, 88% and 86% respectively. Based on the above results, it was found that this process was best suited for secondary or tertiary treatment of phenols from industrial wastewater before disposal. Page(s): 512-518 Mon, 01 Aug 2016 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/35157 2016-08-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/35156 Title: Experimental Validation of Power Quality Improvement in the Domestic and Industrial Fan Load Authors: Mahendran, S; Gnanambal, I; Maheswari, A Abstract: Power quality is not a big problem for low power motors and it becomes a problem in the places where multiple motors are in operation. In this paper, Genetic Algorithm is used to identify the best switching angles to eliminate selected harmonic in the output of the AC chopper. Load value is not mandatory to be known to calculate the switching angles are one of the main advantages of the proposed algorithm. Total Harmonic Distortion of output voltage is calculated from the obtained switching angles and embraced in the proposed fitness function. AC chopper with single phase induction motor model is developed in the MATLAB/SIMULINK environment. High quality output is derived due to the absence of low order harmonics. High efficiency is also achieved by the induction motor drive when it is operated with the proposed technique. Simulation results are validated through the designed prototype in which Genetic algorithm is implemented with the FPGA controller. Simulation and experimental results show that the proposed technique is effective. Page(s): 506-511 Mon, 01 Aug 2016 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/35156 2016-08-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/35155 Title: Characterization of Lignin Peroxidase from Paecilomyces Species for Decolorisation of Pulp and Paper Mill Effluent Authors: Singh, P; Jain, P; Verma, R; Jagadish, R S Abstract: Native fungal isolates F1 - F8 and control fungi Phanerochaete chrysosporium were capable of degrading pulp and paper industry effluent and also efficient producers of cellulolytic and lignolytic enzymes. F3 (Paecilomyces sp) strain showed higher enzyme activity as compared to other native fungal isolates. Weight loss, cellulose loss and organic carbon contents were found maximum in F3. Reducing sugar, protein content and colour removing potential was also higher in F3. Color reduction initiated very fast with microbial enzyme treatment (initiated only after 2h of incubation) and reached maximum reduction after 24h. Lignin peroxidase fraction I and II resulted in 53% and 34% removal of colour and 36% and 38% lignin removal. The culture extract of F3 strain grown on pulp and paper effluent consists of five protein fractions and out of them two fractions of 38 and 40 kDa molecular weight showed lignin peroxidase activity. The pH and temperature optimum for lignin peroxidase activity were 2 to 3, and 20 - 30 ºC, respectively. Maximum activity was observed at 6 mM to 48 mM veratryl alcohol concentration and 256 mM H2O2, however, sodium azide inhibits the enzyme activity. Different metals (CoCl2, HgSO4, CaCl2, SnCl2, FeSO4, CuSO4 and ZnSO4) also affected the lignin peroxidase activity. Page(s): 500-505 Mon, 01 Aug 2016 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/35155 2016-08-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/35154 Title: Optimisation of Pressure and Oil Film Thickness in Multilobe Bearing using Response Surface Methodology and Moga Authors: Biswas, N; Chakraborti, P; Dhar, P Abstract: The performance of a bearing depends upon its load bearing capacity without compromising the friction. As the load increases, oil film thickness decreases owing to increase in oil pressure causing an adverse effect on bearing performance. In multi-lobe bearing oil pressure is released by draining the oil through the lobes. Thus, an optimum oil film thickness can be maintained while increasing the load bearing capacity. An attempt has been made to optimize the oil film thickness after satisfying the condition of maximizing the pressure in three lobes bearing using a genetic algorithm. It gives optimum result and their respective parameter configuration. Page(s): 495-499 Mon, 01 Aug 2016 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/35154 2016-08-01T00:00:00Z