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Article
Influence of UV Treatment on the Food Safety Status of a Model Aquaponic System
Water
  • Sai Deepikaa Elumalai, Iowa State University
  • Angela M. Shaw, Iowa State University
  • D. Allen Pattillo, Iowa State University
  • Christopher J. Currey, Iowa State University
  • Kurt A. Rosentrater, Iowa State University
  • Kun Xie, Iowa State University
Document Type
Article
Publication Version
Published Version
Publication Date
1-6-2017
DOI
10.3390/w9010027
Abstract
Few microbial studies in aquaponics, a growing trend in food production, have been conducted to determine food safety status. The aim of this study was to determine the food safety status and the effectiveness of ultraviolet treatment (15 W, luminous flux of 900 lm) as a food safety intervention in reducing the microbial loads of the water system in a model aquaponic unit growing lettuce, basil, and barramundi (Australian Sea Bass). Sweet basil, bibb lettuce, water samples, and fish swabs were collected throughout the 118-day production period, and microbial analysis was conducted in triplicate for the presence of E. coli O157:H7, Salmonella spp., and the prevalence of aerobic plate counts (APC), coliforms, and fecal coliforms in these systems. Absence of foodborne pathogens was confirmed using ELISA technology and enumeration through petrifilms (coliform/E. coli). A significant increase was observed in aerobic plate counts over the trial period (1 to 3 log10 CFU·mL−1) in the presence and absence of UV (p > 0.05). Ultraviolet treatment did not significantly reduce the APC or coliform counts when compared to the control system samples. Future work should focus on improving the unit design, the evaluation of bio-solid filtration, and other food safety interventions.
Comments

This article is from Water 2017, 9(1), 27; doi:10.3390/w9010027. Posted with permission.

Access
Open
Creative Commons License
Creative Commons Attribution 4.0
Copyright Owner
The authors
Language
en
File Format
application/pdf
Citation Information
Sai Deepikaa Elumalai, Angela M. Shaw, D. Allen Pattillo, Christopher J. Currey, et al.. "Influence of UV Treatment on the Food Safety Status of a Model Aquaponic System" Water Vol. 9 Iss. 1 (2017) p. 27
Available at: http://works.bepress.com/allen-pattillo/2/