http://nopr.niscair.res.in/handle/123456789/14283 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/14294 Title: Batch, repeated batch and continuous degradation of Reactive Black 5 and Reactive Red 120 dye by immobilized bacteria <br/> <br/>Authors: Usha, M S; Sasirekha, B; Bela, R B; Devi, S; Kamalini, C; Manasa, G A; Neha, P M <br/> <br/>Abstract: This study presents batch degradation of Reactive Black 5 (RB5) and Reactive Red 120 (RR120) dyes using free cells of <i>Aeromonas punctata </i>and <i>Pseudomonas aeruginosa</i>, resulting 100% degradation up to 100 ppm and 150 ppm of respective dye. Immobilized cells showed 100% degradation of RB5 dye (up to 150 ppm) and RR120 dye (up to 200 ppm). On repeated use of immobilized beads, both <i>A. punctata </i>and <i>P. aeruginosa </i>showed 100% degradation of respective dye (at 150 ppm conc.) up to 10 cycles. During continuous degradation, degradation efficiencies of both cultures decreased with increase in dye concentration and flow rate. Degradation efficiency of <i>P. aeruginosa </i>was better than <i>A. punctata </i>with different flow rate and dye concentration. <br/> <br/>Page(s): 504-510 http://nopr.niscair.res.in/handle/123456789/14293 Title: Reduction of COD and chromium, and decolourisation of tannery wastewater by activated carbons from agro-wastes <br/> <br/>Authors: Pandharipande, S L; Urunkar, Y D; Singh, Ankit <br/> <br/>Abstract: This study presents decolourisation of common collection tank (CCT) &amp; chromium tank (CT) wastewater samples, reduction of COD from lime water collection tank (LWCT) &amp; CCT wastewater samples and reduction of chromium from CT wastewater samples. Activated carbons (ACs) were synthesized from rice husk, saw dust and sugarcane baggasse. Saw dust activated carbon reduced COD of CCT wastewater by 94.8%, whereas sugarcane baggasse activated carbon reduced COD of LWCT by 77%. Thus sugarcane baggasse activated carbon is most effective among three ACs for removal of chromium, whereas all ACs developed are equally effective for decolourisation of CCT and CT wastewater samples. <br/> <br/>Page(s): 501-503 http://nopr.niscair.res.in/handle/123456789/14292 Title: Biological treatability processes of textile wastewaters using electrocoagulation and ozonation <br/> <br/>Authors: Avsar, Yasar; Kabuk, H Akif; Kurt, Ugur; Cakmakci, Mehmet; Ozkaya, Bestamin <br/> <br/>Abstract: This study presents biotreatment of textile wastewaters using electrocoagulation and ozone processes. Ozonation process gave better results than electrocoagulation process. For electrocoagulation, optimum working conditions were found as follows: pH, 6.5; electrode type, iron electrode; current density, 20 mA/cm2; and reaction time, 15 min. Under these circumstances, values determined for electrocoagulation and ozonation processes, respectively, were as follows: COD removal, 73, 46%; color removal, 85, 93%; BOD/COD ratio, 0.60, 0.69; and cost per unit of wastewater treatment, 1.7, 1.3 $. <br/> <br/>Page(s): 496-500 http://nopr.niscair.res.in/handle/123456789/14291 Title: Wear and thermal conductivity studies on nano copper particle suspended soya bean lubricant <br/> <br/>Authors: Kanagasabapathi, N; Balamurugan, K; Mayilsamy, K <br/> <br/>Abstract: This study presents lubrication, wear and thermal conductivity of transesterified soya bean oil (SBO). Nano copper particle was added to soya bean methyl ester (SBME) to improve wear resistance and heat transfer characteristics. Various SBO formulations (Crude SBO, SBME, SBME + 1.5% nano copper) and commercial mineral oil based 4T oil were tested for tribological and thermal conductivity. Wear results of SBME+1.5% Cu showed reduction in wear scar diameter by 12% compared to SBME, and 9.5% compared to 4T oil. Thermal conductivity of SBME+1.5% Cu was 1.66 times more than that of SBME, and 1.83 times more than that of 4T mineral oil. <br/> <br/>Page(s): 492-495