Department Of Environmental Science And Technology

Permanent URI for this communityhttps://kr.cup.edu.in/handle/32116/84

Browse

Author: search.filters.author.Rajesh Banu, J.Has files: Yes

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Treatment of pulp and paper mill wastewater by solar photo-Fenton process
    (Desalination Publications, 2014) Ginni, G.; Adishkumar, S.; Rajesh Banu, J.; Yogalakshmi, N.
    Solar photo-Fenton process is an attractive, alternative treatment technology among advanced oxidation processes for the treatment of wastewater containing recalcitrant compounds. The feasibility of solar photo-Fenton process for the treatment of pulp and paper mill wastewater was investigated in this study. The complete colour and chemical oxygen demand (COD) removal were obtained under optimal conditions, pH = 4, Fe2+ = 1 g/L, H2O2 = 5 g/L and irradiation time = 90 min. Also it enhances the biodegradability of wastewater and the biochemical oxygen demand (BOD3)/COD ratio was found to increase from 0.028 to 0.83. The effluent's BOD and total suspended solids concentrations were found to be 0 and 30 mg/L, respectively, which meets the requirements of the discharge standard. ? 2013 Balaban Desalination Publications. All rights reserved.
  • Thumbnail Image
    Item
    Effect of enzyme secreting bacterial pretreatment on enhancement of aerobic digestion potential of waste activated sludge interceded through EDTA
    (Elsevier Ltd, 2013) Kavitha, S.; Adish Kumar, S.; Yogalakshmi, K.N.; Kaliappan, S.; Rajesh Banu, J.
    In this study, the effect of Ethylene diamine tetra acetic acid (EDTA) on Extracellular polymeric substance (EPS) removal tailed with bacterial enzymatic pretreatment on aerobic digestion of activated sludge was studied. In order to enhance the accessibility of sludge to the enzyme secreting bacteria; the extracellular polymeric substances were removed using EDTA. EDTA efficiently removed the EPS with limited cell lysis and enhanced the sludge enzyme activity at its lower concentration of 0.2. g/g SS. The sludge was then subjected to bacterial pretreatment to enhance the aerobic digestion. In aerobic digestion the best results in terms of Suspended solids (SS) reduction (48.5%) and COD (Chemical oxygen demand) solubilization (47.3%) was obtained in experimental reactor than in control. These results imply that aerobic digestion can be enhanced efficiently through bacterial pretreatment of EPS removed sludge. ? 2013 Elsevier Ltd.