http://nopr.niscair.res.in/handle/123456789/5186 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/5500 Title: Emission factors for the quantification of dust in Indian coal mines <br/> <br/>Authors: Ghose, Mrinal K <br/> <br/>Abstract: The increasing trend of opencast coal mining tends to release huge amount of dust. But there is no well defined method of estimating dust emission due to coal mining activities This paper examines the sources of dust emission due to coal mining activities and focuses on the quantification of dust emission with the use of emission factors or prediction type equations. Because of site-specific nature, emission factors developed for one site may not give the correct results for another site. In the present investigation prediction equations are utilized for the development of emission factors and they are used for the quantification of dust generation due to opencast coal mining. For the applications of this concept one large opencast coal project of Bharat Coking Coal Ltd (BCCL) was investigated and the amount of dust emitted due to different mining activities was quantified. This paper also focuses on the significance of this study in the field of environmental protection and likely impacts of such study. The paper concludes that once the amount of dust generation is estimated, the impact on air quality can be assessed appropriately and a proper air pollution control strategy can be developed. <br/> <br/>Page(s): 763-768 http://nopr.niscair.res.in/handle/123456789/5498 Title: Studies on the spent liquor recirculation during soda-amine pulping of jute <br/> <br/>Authors: Jahan, M Sarwar; Chowdhury, D A Nasima; Islam, M Khalidul; Hossain, S N <br/> <br/>Abstract: Spent liquor of soda-monoethanolamine and soda-ethylenediamine processes were recirculated with white liquor in different proportions and its effect was studied on pulp properties and solid content in spent liquor. Pulp yield, kappa number, and solid contents in spent liquor were increased with increasing spent liquor recirculation. These increases were higher in soda-ethylenediamine process than that in soda-monoethanolamine process. There was not much significant change in strength properties up to 35 per cent of the spent liquor recirculation. The bleachability of the spent liquor recirculated pulp did not change much. <br/> <br/>Page(s): 758-762 http://nopr.niscair.res.in/handle/123456789/5496 Title: Jute caddis — A new substrate for biogas production <br/> <br/>Authors: Banik, S <br/> <br/>Abstract: Biogas containing 55-65 per cent methane can be produced from jute caddis – a lignocellulosic waste of jute mills by anaerobic fermentation, using cattle dung as sole source of inoculum. Biogas production from a lignocellulosic material like jute caddis is a slow but steady process where methane rich biogas comes mostly from hemicellulose and cellulose but not from lignin. Batch fermentation has been adopted for utilization of jute caddis in a modified KVIC model (floating dome type) biogas plant although problem of hard scum formation could not be completely eliminated. However the results indicate that jute waste is a promising substrate for biomethanation because of its slow and steady nature of decomposition. Thus jute mills can adopt this eco-friendly technology for their commercial exploitation. <br/> <br/>Page(s): 747-751 http://nopr.niscair.res.in/handle/123456789/5494 Title: Sugarcane bagasse improves the activity of ligninolytic enzymes and decolourization of dyes by the white-rot fungus <i style="">Pleurotus ostreatus</i> <br/> <br/>Authors: Sen, Soma; Singh, P P; Rathore, V S; Pereira, Ben M J <br/> <br/>Abstract: Stationary cultures of <i style="">Pleurotus ostreatus</i>, MTCC-1804 supplemented with bagasse powder or its ethanolic extract, showed a concentration-dependent enhancement in the laccase activity both in liquid and semi-solid (glass bead) cultures. Bagasse extract also imparted greater stability to the enzyme. Mn-peroxidase (MnP) activity was detected only in cultures supplemented with bagasse or its extract. Supplementation of liquid culture with bagasse extract resulted in greater decolouization of three industrial dyes. Biotechnological applications of bagasse and its extract in industrial pollution management have been discussed. <br/> <br/>Page(s): 739-746