The current communication reports the development of a single-stage biosystem for biohythane prod... more The current communication reports the development of a single-stage biosystem for biohythane production from wastewater treatment. A semi-pilot scale bioreactor with 34 L capacity was used for this study. Maximum biohythane production of 147.5 ± 2.4 L was observed after five cycles of operation with production rate of 4.7 ± 0.1 L/h. The biohythane composition (H2/(H2 + CH4)) varied from 0.60 to 0.23 during stabilized fifth cycle of operation. During each cycle of operation, higher H2 fraction was noticed within 12 h of cycle period followed by CH4 production for rest of operation (36 h). During biohythane production, COD removal efficiency of 60 ± 5% (SDR, 29.0 ± 1.9 kg CODr/m3-day) was also achieved. The synergistic function of volatile fatty acids (VFA) production and consumption during process in hybrid biosystem played vital role on the composition of biohythane. The single-stage biosystem facilitates production of high valued and cost efficient biofuel (biohythane) with fewer controls than individual acidogenic and methanogenic processes.
... 1). The biofilm reactor was designed to operate in the upflow mode (L/D ratio 9.7) with inert... more ... 1). The biofilm reactor was designed to operate in the upflow mode (L/D ratio 9.7) with inert stone chips (0.02 cm × 0.05 cm; void ratio 0.54) used as packing material for fixed bed to support the growth of anaerobic mixed microflora. ...
Toxicological & Environmental Chemistry, Jan.Feb. 2008; 90(1): 3141... more Toxicological & Environmental Chemistry, Jan.Feb. 2008; 90(1): 3141 ... Chemical fractionation of heavy metals in airborne particulate matter (PM10) by sequential extraction procedure ... M. PRAVEEN KUMAR1, S. VENKATA MOHAN2, & S. JAYARAMA REDDY1
This study presents an approach to enhance fermentative biohydrogen (H2) production by improving ... more This study presents an approach to enhance fermentative biohydrogen (H2) production by improving the system buffering capacity through utilization of CO2 generated from syngas. The experimental data substantiates the positive impact of CO2 sparging on H2 production process. Various CO2 sparging times viz., 30, 60 and 120s were evaluated on H2 production and substrate degradation. Based on the optimum sparging time (60s), experiments were further performed to study the influence of pH microenvironment (5, 6 ...
Bio (microbial) fuel cell (microbial fuel cell) with Saccharomyces cerevisiae as anodic biocataly... more Bio (microbial) fuel cell (microbial fuel cell) with Saccharomyces cerevisiae as anodic biocatalyst was evaluated in terms of power generation and substrate degradation at three redox conditions (5.0, 6.0 and 7.0). Fuel cell was operated in single chamber (open-air ...
Fluoride, pH, chloride, total hardness, specific conductivity and Sulfate are determined for drin... more Fluoride, pH, chloride, total hardness, specific conductivity and Sulfate are determined for drinking water collected from twelve important locations of Tirupati town, India during two different seasons in 1992. Regression models are developed to forecast fluoride ...
The current communication reports the development of a single-stage biosystem for biohythane prod... more The current communication reports the development of a single-stage biosystem for biohythane production from wastewater treatment. A semi-pilot scale bioreactor with 34 L capacity was used for this study. Maximum biohythane production of 147.5 ± 2.4 L was observed after five cycles of operation with production rate of 4.7 ± 0.1 L/h. The biohythane composition (H2/(H2 + CH4)) varied from 0.60 to 0.23 during stabilized fifth cycle of operation. During each cycle of operation, higher H2 fraction was noticed within 12 h of cycle period followed by CH4 production for rest of operation (36 h). During biohythane production, COD removal efficiency of 60 ± 5% (SDR, 29.0 ± 1.9 kg CODr/m3-day) was also achieved. The synergistic function of volatile fatty acids (VFA) production and consumption during process in hybrid biosystem played vital role on the composition of biohythane. The single-stage biosystem facilitates production of high valued and cost efficient biofuel (biohythane) with fewer controls than individual acidogenic and methanogenic processes.
... 1). The biofilm reactor was designed to operate in the upflow mode (L/D ratio 9.7) with inert... more ... 1). The biofilm reactor was designed to operate in the upflow mode (L/D ratio 9.7) with inert stone chips (0.02 cm × 0.05 cm; void ratio 0.54) used as packing material for fixed bed to support the growth of anaerobic mixed microflora. ...
Toxicological & Environmental Chemistry, Jan.Feb. 2008; 90(1): 3141... more Toxicological & Environmental Chemistry, Jan.Feb. 2008; 90(1): 3141 ... Chemical fractionation of heavy metals in airborne particulate matter (PM10) by sequential extraction procedure ... M. PRAVEEN KUMAR1, S. VENKATA MOHAN2, & S. JAYARAMA REDDY1
This study presents an approach to enhance fermentative biohydrogen (H2) production by improving ... more This study presents an approach to enhance fermentative biohydrogen (H2) production by improving the system buffering capacity through utilization of CO2 generated from syngas. The experimental data substantiates the positive impact of CO2 sparging on H2 production process. Various CO2 sparging times viz., 30, 60 and 120s were evaluated on H2 production and substrate degradation. Based on the optimum sparging time (60s), experiments were further performed to study the influence of pH microenvironment (5, 6 ...
Bio (microbial) fuel cell (microbial fuel cell) with Saccharomyces cerevisiae as anodic biocataly... more Bio (microbial) fuel cell (microbial fuel cell) with Saccharomyces cerevisiae as anodic biocatalyst was evaluated in terms of power generation and substrate degradation at three redox conditions (5.0, 6.0 and 7.0). Fuel cell was operated in single chamber (open-air ...
Fluoride, pH, chloride, total hardness, specific conductivity and Sulfate are determined for drin... more Fluoride, pH, chloride, total hardness, specific conductivity and Sulfate are determined for drinking water collected from twelve important locations of Tirupati town, India during two different seasons in 1992. Regression models are developed to forecast fluoride ...
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