NISCAIR Online Periodicals Repository Collection: JSIR Vol.68(10) [October 2009]

Biodegradation kinetics of benzoic and anthranilic acids by Micrococcus sp.

Mon, 28 Sep 2009 22:58:59 GMT

Title: Biodegradation kinetics of benzoic and anthranilic acids by Micrococcus sp.

Authors: Muthukumar, Karuppan; Bharath, Chakravarthy; Pugalenthi, Velan; Velan, Manickam

Abstract: This study presents biodegradation of benzoic acid (BA) and anthranilic acid (AA) by Micrococcus sp. under aerobic conditions. Initial concentrations of BA and AA were varied (500-2500 mg/l) and almost complete biodegradation of BA and AA was observed within 30 h. Andrews kinetic model for single substrate was fitted to obtain maximum specific growth rates, half saturation and substrate inhibition constants. Cell growth with degrading BA ( _m,BA = 0.645 h^-1) was faster than with degrading AA ( _m,AA = 0.63 h^-1). Under biodegradation of BA and AA, first order rate constant values decreased with increase in initial concentration.

Page(s): 900-903

Adsorptive removal of Reactive and Direct dyes using non-conventional adsorbent – Column studies

Mon, 28 Sep 2009 22:58:59 GMT

Title: Adsorptive removal of Reactive and Direct dyes using non-conventional adsorbent – Column studies

Authors: Sivakumar, P; Palanisamy, P N

Abstract: This study presents effect of influent concentration, flow rate and bed height on packed bed column prepared by Euphorbia antiquorum L activated carbon used for adsorptive removal of dyes, Reactive Red 4 and Direct Blue 53. Adsorption efficiency increases with increase in influent concentration and bed depth and decreases with increase in flow rate. Yoon-Nelson model described adsorption behaviour of selected adsorbent-adsorbate system more reasonably than Thomas model and Reactive Red 4 adsorption behaviour fits exceptionally well with Yoon-Nelson model.

Page(s): 894-899

Effect of photosensitizers and inorganic ions on hydrogen generation from hydrogen sulfide

Mon, 28 Sep 2009 22:58:59 GMT

Title: Effect of photosensitizers and inorganic ions on hydrogen generation from hydrogen sulfide

Authors: Priya, R; Kanmani, S

Abstract: This study presents hydrogen (H₂) generation from hydrogen sulfide (H₂S) using photocatalyst [(CdS/ZnS)/Ag₂S+(RuO₂/ TiO₂)] with photosensitizers (Rhodamine B, Eosin Y, Methylene Blue and Methyl Violet). In presence of Rhodamine B, photocatalyst yields 1.3 times more H₂ than control. In presence of anions (I^-, Cl^-, NO₃^-, CO₃^2- and SO₄^2-) and cations (Fe³⁺, Cu²⁺), photocatalyst yields less H₂.

Page(s): 891-893

Utilization of biomass as engine fuel

Mon, 28 Sep 2009 22:58:59 GMT

Title: Utilization of biomass as engine fuel

Authors: Malik, Ashish; Singh, Lakhwinder; Singh, Indraj

Abstract: In this study, performance of gasifier engine system is analyzed by running 5kW engine at different load conditions to check maximum diesel savings in dual fuel mode operation. Cotton stalks replaces diesel by 80% while sugarcane bagasse replaces it by 82%. By using appropriate agricultural residue, gasifier system integrated with CI engine is economically better than diesel system alone.

Page(s): 887-890