Decolorization of synthetic wastewater containing azo dyes in a batch -operated rotating biological contactor reactor with the immobilized fungus phanerochaete chrysosporium / Kannan Pakshirajan in Industrial & engineering chemistry research, Vol. 49 N° 16 (Août 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp. 7484–7487 Titre : Decolorization of synthetic wastewater containing azo dyes in a batch -operated rotating biological contactor reactor with the immobilized fungus phanerochaete chrysosporium Type de document : texte imprimé Auteurs : Kannan Pakshirajan, Auteur ; Sukhwinder Singh, Auteur Année de publication : 2010 Article en page(s) : pp. 7484–7487 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Wastewater Biological Contactor Résumé : Biodecolorization of synthetic wastewater containing azo dyes, Direct Red-80 (DR-80) and Mordant Blue-9 (MB-9), both individually and together, using immobilized Phanerochaete chrysosporium in a batch-operated rotating biological contactor (RBC) reactor was investigated. Following initial startup of the RBC reactor, which took almost 1 month, results on dye decolorization and enzyme activities of lignin peroxidase (LiP) and manganese peroxidase (MnP) by the fungus were obtained. From experiments involving the individual dyes, decolorization efficiencies were found to be in the range of 94−100%, and from experiments in which the dyes were added together, the decolorization efficiencies of the dye mixture were between 77% and 97% at the end of 24 h. Results of LiP and MnP activities by the fungus revealed a strong role played by the enzymes in the dye decolorization process. As compared to the previous results obtained in batch shake flasks, the results in the present study revealed excellent performance of the bioreactor in decolorizing the wastewater containing the azo dyes. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1007079 [article] Decolorization of synthetic wastewater containing azo dyes in a batch -operated rotating biological contactor reactor with the immobilized fungus phanerochaete chrysosporium [texte imprimé] / Kannan Pakshirajan, Auteur ; Sukhwinder Singh, Auteur . - 2010 . - pp. 7484–7487. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp. 7484–7487 Mots-clés : Wastewater Biological Contactor Résumé : Biodecolorization of synthetic wastewater containing azo dyes, Direct Red-80 (DR-80) and Mordant Blue-9 (MB-9), both individually and together, using immobilized Phanerochaete chrysosporium in a batch-operated rotating biological contactor (RBC) reactor was investigated. Following initial startup of the RBC reactor, which took almost 1 month, results on dye decolorization and enzyme activities of lignin peroxidase (LiP) and manganese peroxidase (MnP) by the fungus were obtained. From experiments involving the individual dyes, decolorization efficiencies were found to be in the range of 94−100%, and from experiments in which the dyes were added together, the decolorization efficiencies of the dye mixture were between 77% and 97% at the end of 24 h. Results of LiP and MnP activities by the fungus revealed a strong role played by the enzymes in the dye decolorization process. As compared to the previous results obtained in batch shake flasks, the results in the present study revealed excellent performance of the bioreactor in decolorizing the wastewater containing the azo dyes. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1007079

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Detection method and filters for blocking effect reduction of highly compressed images / Jagroop Singh in Signal processing. Image communication, Vol. 26 N° 8-9 (Octobre 2011)  

Public ISBD [article]  inSignal processing. Image communication > Vol. 26 N° 8-9 (Octobre 2011) . - pp. 493–506 Titre : Detection method and filters for blocking effect reduction of highly compressed images Type de document : texte imprimé Auteurs : Jagroop Singh, Auteur ; Sukhwinder Singh, Auteur ; Dilbag Singh, Auteur Année de publication : 2012 Article en page(s) : pp. 493–506 Note générale : Electronique Langues : Anglais (eng) Mots-clés : Blocking artifacts DCT Image compression MOS PSNR SF Résumé : Image compression plays a pivotal role in minimizing the data size and reduction in transmission costs. Many coding techniques have been developed, but the most effective is the JPEG compression. However, the reconstructed images from JPEG compression produce noticeable image degradations near block boundaries called blocking artifacts, particularly in highly compressed images. A method to detect and reduce these artifacts without smoothing images and without removing perceptual features has been presented in this paper. In this work, a low computational deblocking filter with four modes is proposed, including three frequency-related modes (smooth, non-smooth, and intermediate) and a corner mode for the corner of four blocks. Extensive experiments and comparison with other deblocking methods have been conducted on the basis of PSNR, MSSIM, SF, and MOS to justify the effectiveness of the proposed method. The proposed algorithm keeps the computation lower and achieves better detail preservation and artifact removal performance. ISSN : 0923-5965 En ligne : http://www.sciencedirect.com/science/article/pii/S0923596511000403 [article] Detection method and filters for blocking effect reduction of highly compressed images [texte imprimé] / Jagroop Singh, Auteur ; Sukhwinder Singh, Auteur ; Dilbag Singh, Auteur . - 2012 . - pp. 493–506. Electronique Langues : Anglais (eng) in Signal processing. Image communication > Vol. 26 N° 8-9 (Octobre 2011) . - pp. 493–506 Mots-clés : Blocking artifacts DCT Image compression MOS PSNR SF Résumé : Image compression plays a pivotal role in minimizing the data size and reduction in transmission costs. Many coding techniques have been developed, but the most effective is the JPEG compression. However, the reconstructed images from JPEG compression produce noticeable image degradations near block boundaries called blocking artifacts, particularly in highly compressed images. A method to detect and reduce these artifacts without smoothing images and without removing perceptual features has been presented in this paper. In this work, a low computational deblocking filter with four modes is proposed, including three frequency-related modes (smooth, non-smooth, and intermediate) and a corner mode for the corner of four blocks. Extensive experiments and comparison with other deblocking methods have been conducted on the basis of PSNR, MSSIM, SF, and MOS to justify the effectiveness of the proposed method. The proposed algorithm keeps the computation lower and achieves better detail preservation and artifact removal performance. ISSN : 0923-5965 En ligne : http://www.sciencedirect.com/science/article/pii/S0923596511000403

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