Identification of Robust Thermophilic Methanogenic Archaea and Packing Material for High Liquid Hold-Up at Low Volumetric Gas Flow Rates for Use in Trickle-Bed Reactors for Biological Methanation

2021 ◽  
Author(s):  
Anja Kaul ◽  
Andrea Böllmann ◽  
Martin Thema ◽  
Larissa Kalb ◽  
Richard Stöckl ◽  
...  
Keyword(s):  
Gas Flow ◽  
Methanogenic Archaea ◽  
Packing Material ◽  
Flow Rates ◽  
Trickle Bed Reactors ◽  
Trickle Bed

Combining a robust thermophilic methanogen and packing material with high liquid hold-up to optimize biological methanation in trickle-bed reactors

2021 ◽  
pp. 126524
Author(s):  
Anja Kaul ◽  
Andrea Böllmann ◽  
Martin Thema ◽  
Larissa Kalb ◽  
Richard Stöckl ◽  
...  
Keyword(s):  
Packing Material ◽  
Trickle Bed Reactors ◽  
Trickle Bed

Packing wetting in trickle bed reactors: Influence of the gas flow rate

1981 ◽  
Vol 36 (1) ◽  
pp. 226-228 ◽  
Author(s):  
S. Sicardi ◽  
G. Baldi ◽  
V. Specchia ◽  
I. Mazzarino ◽  
A. Gianetto
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Gas Flow Rate ◽  
Trickle Bed Reactors ◽  
Trickle Bed

scholarly journals Removal of Acetone Vapor from Air Using a Biotrickling Filter Packed with Polymeric Bioballs

Processes ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 57
Author(s):  
Alvydas Zagorskis ◽  
Tomas Januševičius ◽  
Vaidotas Danila
Keyword(s):  
Pseudomonas Putida ◽  
Human Health ◽  
Removal Efficiency ◽  
Gas Flow ◽  
Packing Material ◽  
Biotrickling Filter ◽  
Acetone Vapor ◽  
Filtration Time ◽  
Flow Rates ◽  
Air Biofiltration

Acetone released into the atmosphere can adversely affect human health and the environment. The aim of this work was to evaluate the performance of a laboratory-scale biotrickling filter (BTF) with bioball packing material to remove acetone vapor from contaminated air. The acetone removal efficiency was investigated in two different scenarios: with and without the inoculation of microorganisms. Three strains of bacteria, Pseudomonas putida, Rhodococcus aerolatus, and Aquaspirillum annulus, were used in the BTF. In both cases, the filter units were simultaneously operated for 100 days under three different inlet acetone concentrations (0.18 ± 0.01 g/m3, 0.25 ± 0.01 g/m3, and 0.40 ± 0.02 g/m3) and two different gas flow rates (2.54 and 5.09 m3/h). The results showed that acetone removal was greater in the filter with the inoculated bacteria. In the filter operated without inoculum, the acetone removal efficiency gradually decreased with filtration time from 90.1% to 6.1%. While employing three types of bacteria in the BTF, the efficiency of acetone removal remained relatively stable and varied between 70.2% and 97.6%. The study also revealed that bioballs can be successfully used as a packing material in air biofiltration systems designed for acetone removal from the air.

Investigation of so2oxidation rates in trickle-bed reactors operating at low liquid flow rates

1992 ◽  
Vol 70 (3) ◽  
pp. 600-603 ◽  
Author(s):  
Patricia M. Haure ◽  
R. R. Hudgins ◽  
P. L. Silvestion
Keyword(s):  
Liquid Flow ◽  
Flow Rates ◽  
Trickle Bed Reactors ◽  
Trickle Bed

scholarly journals Evaluation of a Humidified Nasal High-Flow Oxygen System, Using Oxygraphy, Capnography and Measurement of Upper Airway Pressures

2011 ◽  
Vol 39 (6) ◽  
pp. 1103-1110 ◽  
Author(s):  
J. E. Ritchie ◽  
A. B. Williams ◽  
C. Gerard ◽  
H. Hockey
Keyword(s):  
Healthy Volunteers ◽  
Airway Pressure ◽  
Gas Flow ◽  
Air Entrainment ◽  
High Flow ◽  
Positive Pressure ◽  
Mean Airway Pressure ◽  
Flow Rates ◽  
Oxygen Fraction ◽  
Airway Pressures

In this study, we evaluated the performance of a humidified nasal high-flow system (Optiflow™, Fisher and Paykel Healthcare) by measuring delivered FiO2 and airway pressures. Oxygraphy, capnography and measurement of airway pressures were performed through a hypopharyngeal catheter in healthy volunteers receiving Optiflow™ humidified nasal high flow therapy at rest and with exercise. The study was conducted in a non-clinical experimental setting. Ten healthy volunteers completed the study after giving informed written consent. Participants received a delivered oxygen fraction of 0.60 with gas flow rates of 10, 20, 30, 40 and 50 l/minute in random order. FiO2, FEO2, FECO2 and airway pressures were measured. Calculation of FiO2 from FEO2 and FECO2 was later performed. Calculated FiO2 approached 0.60 as gas flow rates increased above 30 l/minute during nose breathing at rest. High peak inspiratory flow rates with exercise were associated with increased air entrainment. Hypopharyngeal pressure increased with increasing delivered gas flow rate. At 50 l/minute the system delivered a mean airway pressure of up to 7.1 cmH2O. We believe that the high gas flow rates delivered by this system enable an accurate inspired oxygen fraction to be delivered. The positive mean airway pressure created by the high flow increases the efficacy of this system and may serve as a bridge to formal positive pressure systems.

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