scholarly journals Performance Study of Chromium (VI) Removal in Presence of Phenol in a Continuous Packed Bed Reactor byEscherichia coliIsolated from East Calcutta Wetlands

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Bhaswati Chakraborty ◽  
Suvendu Indra ◽  
Ditipriya Hazra ◽  
Rupal Betai ◽  
Lalitagauri Ray ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Health Hazard ◽  
Air Flow ◽  
Packed Bed ◽  
Reactor System ◽  
Packed Bed Reactor ◽  
Continuous Reactor ◽  
Performance Study ◽  
Chromium Vi ◽  
Synthetic Media

Organic pollutants, like phenol, along with heavy metals, like chromium, are present in various industrial effluents that pose serious health hazard to humans. The present study looked at removal of chromium (VI) in presence of phenol in a counter-current continuous packed bed reactor packed withE. colicells immobilized on clay chips. The cells removed 85% of 500 mg/L of chromium (VI) from MS media containing glucose. Glucose was then replaced by 500 mg/L phenol. Temperature and pH of the MS media prior to addition of phenol were 30°C and 7, respectively. Hydraulic retention times of phenol- and chromium (VI)-containing synthetic media and air flow rates were varied to study the removal efficiency of the reactor system. Then temperature conditions of the reactor system were varied from 10°C to 50°C, the optimum being 30°C. The pH of the media was varied from pH 1 to pH 12, and the optimum pH was found to be 7. The maximum removal efficiency of 77.7% was achieved for synthetic media containing phenol and chromium (VI) in the continuous reactor system at optimized conditions, namely, hydraulic retention time at 4.44 hr, air flow rate at 2.5 lpm, temperature at 30°C, and pH at 7.

scholarly journals Design and Testing of a LabView-Controlled Catalytic Packed-Bed Reactor System for Production of Hydrocarbon Fuels

2012 ◽  
Vol 55 (3) ◽  
pp. 1047-1055 ◽  
Author(s):  
J. Street ◽  
F. Yu ◽  
J. Warnock ◽  
J. Wooten ◽  
E. Columbus ◽  
...  
Keyword(s):  
Packed Bed ◽  
Hydrocarbon Fuels ◽  
Reactor System ◽  
Packed Bed Reactor ◽  
Design And Testing

Modeling of unmixed combustion based packed bed reactor system for heat transfer applications

2018 ◽  
Vol 178 ◽  
pp. 367-376 ◽  
Author(s):  
Srinivas Krishnaswamy ◽  
Amol Deshpande ◽  
K.N. Ponnani
Keyword(s):  
Heat Transfer ◽  
Packed Bed ◽  
Reactor System ◽  
Packed Bed Reactor

Hydrolysis of milk lactose in a packed bed reactor system using immobilized yeast cells

2010 ◽  
Vol 86 (1) ◽  
pp. 42-46 ◽  
Author(s):  
Reeba Panesar ◽  
Parmjit S. Panesar ◽  
Ram S. Singh ◽  
John F. Kennedy
Keyword(s):  
Packed Bed ◽  
Reactor System ◽  
Packed Bed Reactor ◽  
Yeast Cells ◽  
Immobilized Yeast ◽  
Immobilized Yeast Cells ◽  
Hydrolysis Of

High throughput photo-oxidations in a packed bed reactor system

2017 ◽  
Vol 25 (23) ◽  
pp. 6203-6208 ◽  
Author(s):  
Caleb J. Kong ◽  
Daniel Fisher ◽  
Bimbisar K. Desai ◽  
Yuan Yang ◽  
Saeed Ahmad ◽  
...  
Keyword(s):  
High Throughput ◽  
Packed Bed ◽  
Reactor System ◽  
Packed Bed Reactor

scholarly journals Recovery of UAPB from high organic load during startup for phenolic wastewater treatment

2011 ◽  
Vol 17 (4) ◽  
pp. 517-524 ◽  
Author(s):  
Zeinab Bakhshi ◽  
Ghasem Najafpour ◽  
Neya Navayi ◽  
Esmaeel Kariminezhad ◽  
Roya Pishgar ◽  
...  
Keyword(s):  
Steady State ◽  
Removal Efficiency ◽  
Biogas Production ◽  
Phase 1 ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Phenol Concentration ◽  
Synthetic Wastewater ◽  
Organic Load ◽  
Phenol Removal

Biodegradation of synthetic wastewater containing phenol by upflow anaerobic packed bed reactor (UAPB) was studied in this work. The reactor was operated at a hydraulic retention time (HRT) of 24 h and under mesophilic (30?1?C) conditions. The startup operation was conducted for 150 days; split into 4 phases. The phenol concentration was stepwise increased. The concentration of phenol in phases 1, 2, 3 and 4 were 100, 400, 700 and 1000 mg/l, respectively. In phase 1, the reactor reached steady state conditions on the 8th day with a phenol removal efficiency and biogas production rate of 96.8% and 1.42 l/d, respectively. For an increase of the initial phenol concentration in phase 2, a slight decrease in phenol removal efficiency was observed. Similar trends were observed in phases 3 and 4 of startup. Due to the high phenol concentration a sudden decrease in removal efficiency and biogas production was observed. The surviving microorganisms were gradually adapted and acclimated to high phenol concentrations. In phases 3 and 4, the phenol removal efficiency at steady state conditions were 98.4 and 98%, respectively. The maximum biogas production was observed at day 130 with a value of 3.57 l/d that corresponds to phenol concentration of 1000 mg/l.

Application of chitosan-entrapped ?-galactosidase in a packed-bed reactor system

2003 ◽  
Vol 91 (2) ◽  
pp. 1294-1299 ◽  
Author(s):  
Danielle S. Wentworth ◽  
Denise Skonberg ◽  
Darrell W. Donahue ◽  
Amyl Ghanem
Keyword(s):  
Packed Bed ◽  
Reactor System ◽  
Packed Bed Reactor

scholarly journals Treatment of Pesticide-Contaminated Water Using a Selected Fungal Consortium: Study in a Batch and Packed-Bed Bioreactor

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 743
Author(s):  
Marcela Levio-Raiman ◽  
Gabriela Briceño ◽  
Bárbara Leiva ◽  
Sebastián López ◽  
Heidi Schalchli ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Alginate Bead ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Continuous Treatment ◽  
Packed Bed Bioreactor ◽  
Inoculum Concentration ◽  
Pesticide Removal ◽  
Pesticide Metabolites ◽  
Fungal Consortium

This study provides the basis for implementing a continuous treatment system for wastewater containing a pesticide mixture formed by atrazine, iprodione, and chlorpyrifos. Two fungal strains (Verticilium sp. H5 and Metacordyceps sp. H12) isolated from a biomixture of a biopurification system were able to remove different pesticide concentrations (10 to 50 mg L−1) efficiently from the liquid medium; however, the half-life of the pesticides was reduced and characterized by a T1/2 of 5.4 to 9.2 d for atrazine, 3.7 to 5.8 d for iprodione, and 2.6 to 2.9 d for chlorpyrifos using the fungal consortium. The immobilization of the fungal consortium in alginate bead was effective, with the highest pesticide removal observed using an inoculum concentration of 30% wv−1. The packed-bed reactor with the immobilized fungal consortium, which was operated in the continuous mode at different flow rates (30, 60, and 90 mL h−1), required approximately 10 d to achieve removal efficiency (atrazine: 59%; iprodione: 96%; chlorpyrifos: ~85%). The bioreactor was sensitive to flow rate fluctuations but was able to recover performance quickly. The pesticide metabolites hydroxyatrazine, 3,5-dichloroaniline, and 3,5,6-trichloro-2-pyridinol were produced, and a slight accumulation of 3,5,6-trichloro-2-pyridinol was observed. Nevertheless, reactor removal efficiency was maintained until the study ended (60 d).

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