Corrigendum to “Modeling microbial inactivation kinetics of combined UV-H treatments in apple juice” [IFSET 27 (2015) 111–120]

2015 ◽  
Vol 29 ◽  
pp. 319 ◽  
Author(s):  
M. Gouma ◽  
I. Álvarez ◽  
S. Condón ◽  
E. Gayán
Keyword(s):  
Apple Juice ◽  
Microbial Inactivation ◽  
Inactivation Kinetics ◽  
Kinetics Of

High pressure inactivation kinetics of amylase in apple juice

2004 ◽  
Vol 64 (2) ◽  
pp. 151-160 ◽  
Author(s):  
Esmaeil Riahi ◽  
Hosahalli S. Ramaswamy
Keyword(s):  
High Pressure ◽  
Apple Juice ◽  
Inactivation Kinetics ◽  
Kinetics Of

Ultraviolet inactivation of bacteria and model viruses in coconut water using a collimated beam system

2019 ◽  
Vol 25 (7) ◽  
pp. 562-572 ◽  
Author(s):  
Manreet S Bhullar ◽  
Ankit Patras ◽  
Agnes Kilonzo-Nthenge ◽  
Bharat Pokharel ◽  
Michael Sasges
Keyword(s):  
Pathogenic Bacteria ◽  
Microbial Inactivation ◽  
Coconut Water ◽  
Inactivation Kinetics ◽  
E Coli ◽  
Log Reduction ◽  
Ultraviolet C ◽  
Log Linear ◽  
Kinetics Of ◽  
Collimated Beam

This study investigated the effect of ultraviolet-C irradiation on the inactivation of microorganisms in coconut water, a highly opaque liquid food (1.01 ± 0.018 absorption coefficient). Ultraviolet-C inactivation kinetics of two bacteriophages (MS2, T1UV) and three surrogate bacteria ( Escherichia coli, Salmonella Typhimurium, Listeria monocytogenes) in 0.1% (w/v) peptone and coconut water were investigated. Ultraviolet-C irradiation at 254 nm was applied to stirred samples, using a collimated beam device. A series of known ultraviolet-C doses (0–40 mJ cm−2) were applied for ultraviolet-C treatment except for MS2 where higher doses were delivered (100 mJ cm−2). Inactivation levels of all organisms were proportional to ultraviolet-C dose. At the highest dose of 40 mJ cm−2, three surrogates of pathogenic bacteria were inactivated by more than 5-log10 (p < 0.05) in 0.1% (w/v) peptone and coconut water. Results showed that ultraviolet-C irradiation effectively inactivated bacteriophage and surrogate bacteria in highly opaque coconut water. The log reduction kinetics of microorganisms followed log-linear and exponential models with higher R2 (>0.95) and low root mean square error values. The D10 values of 3, 5.48, and 4.58 mJ cm−2 were obtained from the inactivation of E. coli, S. Typhimurium, and L. monocytogenes, respectively. Models for predicting log reduction as a function of ultraviolet-C irradiation dose were found to be significant (p < 0.05). Fluid optics were the key controlling parameters for efficient microbial inactivation. Therefore, the ultraviolet-C dose must be calculated not only from the incident ultraviolet-C intensity but must also consider the attenuation in the samples. The results from this study imply that adequate log reduction of vegetative cells and model viruses is achievable in coconut water and suggested significant potential for ultraviolet-C treatment of other liquid foods.

Kinetics of PAA Demand and its Implications on Disinfection of Wastewaters

2006 ◽  
Vol 41 (4) ◽  
pp. 398-409 ◽  
Author(s):  
Dario Falsanisi ◽  
Ronald Gehr ◽  
Domenico Santoro ◽  
Adele Dell'Erba ◽  
Michele Notarnicola ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Treatment Plant ◽  
Total Coliform ◽  
Microbial Inactivation ◽  
Inactivation Kinetics ◽  
Municipal Wastewater Treatment ◽  
Experimental Conditions ◽  
Batch Tests ◽  
The United Kingdom ◽  
Kinetics Of

Abstract Disinfectant demand and microbial inactivation rate are essential issues for assessing disinfection performance and proper design of disinfecting systems. In the United Kingdom and Italy, peracetic acid (PAA) has recently become an accepted disinfectant for treating wastewaters prior to reuse in agriculture, and its use is likely to spread worldwide due to its efficacy as well as the benign nature of the by-products produced. In this paper, overall PAA demand during the advanced disinfection of municipal wastewater for agricultural reuse was evaluated under different experimental conditions. Batch tests were carried out using primary and secondary settled effluents sampled at the City of Taranto municipal wastewater treatment plant. PAA dosages ranged from 1.5 to 8.5 mg/L and from 21 to 40 mg/L for the secondary and primary settled effluents, respectively. Residual PAA was measured after contact times ranging from 1 to 60 min. Results showed that after a strong and almost instantaneous initial disinfectant consumption, the PAA consumption followed first-order kinetics with both effluents. The effluent characteristics affected the values of the parameters in the consumption model. PAA disinfection efficacy was assessed in terms of total coliform and Escherichia coli indicator organism reduction; better results were achieved with the latter. The approximate solution of Hom's model established by Haas and Joffe was used to model inactivation kinetics of both microbial targets.

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