Dynamic changes in the physicochemical properties of fresh-cut produce wash water as impacted by commodity type and processing conditions


Autoři: Jie Li aff001;  Zi Teng aff002;  ShihChi Weng aff004;  Bin Zhou aff002;  Ellen R. Turner aff002;  Bryan T. Vinyard aff005;  Yaguang Luo aff002
Působiště autorů: College of Food Science and Technology, Huazhong Agricultural University, Wuhan, PR China aff001;  U. S. Department of Agriculture, Agricultural Research Service, Beltsville Agricultural, Research Center, Environmental Microbiology and Food Safety Laboratory, Beltsville, MD, United States of America aff002;  Department of Nutrition and Food Science, University of Maryland, College Park, MD, United States of America aff003;  JHU/MWH Alliance, 615 N. Wolfe St., Johns Hopkins University, Baltimore, MD aff004;  Statistics Group, Northeast Area Office, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD, United States of America aff005
Vyšlo v časopise: PLoS ONE 14(9)
Kategorie: Research Article
doi: 10.1371/journal.pone.0222174

Souhrn

Organic materials in fresh-cut produce wash water deplete free chlorine that is required to prevent pathogen survival and cross-contamination. This research evaluated water quality parameters frequently used to describe organic load for their fitness to predict chlorine demand (CLD) and chemical oxygen demand (COD), which are major needs identified by the industry-led produce food safety taskforce. Batches of romaine lettuce, iceberg lettuce, or carrot of different cut sizes and shapes were washed in 40 liters of water. Physicochemical properties of wash water including CLD, COD, total organic carbon (TOC), total suspended solids (TSS), total dissolved solids (TDS), turbidity, total sugar content, and pH, were monitored. Results indicate that pH is primarily commodity dependent, while organic load is additionally impacted by cutting and washing conditions. Significant linear increases in COD, TOC, CLD, TDS, and turbidity resulted from increasing product-to-water ratio, and decreasing cut size. Physicochemical parameters, excluding pH, showed significant positive correlation across different cut sizes within a commodity. High correlations were obtained between CLD and COD and between COD and TOC for pooled products. The convenient measurement of TDS, along with its strong correlation with COD and CLD, suggests the potential of TDS for predicting organic load and chlorine reactivity. Finally, the potential application and limitation of the proposed models in practical produce processing procedures are discussed extensively.

Klíčová slova:

Forecasting – Water quality – Chemical oxygen demand – Chlorine – Turbidity – Total dissolved solids – Physicochemical properties – Lettuce


Zdroje

1. Luo Y., Nou X., Millner P., Zhou B., Shen C., Yang Y., et al. (2012). A pilot plant scale evaluation of a new process aid for enhancing chlorine efficacy against pathogen survival and cross-contamination during produce wash. International Journal of Food Microbiology, 158(2), 133–139. doi: 10.1016/j.ijfoodmicro.2012.07.008 22857846

2. Gombas D., Luo Y., Brennan J., Shergill G., Petran R., Walsh R., et al. (2017). Guidelines to validate control of cross-contamination during washing of fresh-cut leafy vegetables. Journal of Food Protection, 80(2) 312–330. doi: 10.4315/0362-028X.JFP-16-258 28221982

3. World Health Organization. (2011). Guidelines for drinking-water quality. WHO chronicle, 38(4), 104–108.

4. Storey M. V., van der Gaag B., & Burns B. P. (2011). Advances in on-line drinking water quality monitoring and early warning systems. Water Research, 45(2), 741–747. doi: 10.1016/j.watres.2010.08.049 20851446

5. Center for Produce Safety Announces Call for Research Proposals (2011). Center for Produce Safety

6. Fan X., & Sokorai K. J. (2015). Formation of trichloromethane in chlorinated water and fresh-cut produce and as a result of reaction with citric acid. Postharvest Biology and Technology, 109, 65–72. https://doi.org/10.1016/j.postharvbio.2015.06.009

7. Gómez-López V. M., Gobet J., Selma M. V., Gil M. I., & Allende A. (2013). Operating conditions for the electrolytic disinfection of process wash water from the fresh-cut industry contaminated with E. coli O157:H7. Food Control, 29(1), 42–48. https://doi.org/10.1016/j.foodcont.2012.05.052

8. Fadini P., Jardim W., & Guimarães J. (2004). Evaluation of organic load measurement techniques in a sewage and waste stabilisation pond. Journal of the Brazilian Chemical Society, 15(1), 131–135. http://dx.doi.org/10.1590/S0103-50532004000100020

9. Nelson D., & Sommers L. E. (1982). Total carbon, organic carbon, and organic matter. In Page A.L., Miller R.H., & Keeney D.R. (Eds.), Methods of soil analysis. Part 2. Chemical and microbiological properties (pp. 539–579). American Society of Agronomy, Soil Science Society of America, Madison. https://doi.org/10.2134/agronmonogr9.2.2ed.c29

10. Toivonen P. M. A., & Lu C. (2013). Differential quenching of free chlorine by organic compounds potentially exuded from injured plant tissues. Postharvest Biology and Technology, 86, 192–194. https://doi.org/10.1016/j.postharvbio.2013.06.035

11. Teng Z., van Haute S., Zhou B., Hapeman C.J., Millner P.D., Wang Q., et al. (2018) Impacts and interactions of organic compounds with chlorine sanitizer in recirculated and reused produce processing water. PLOS ONE 13(12): e0208945. 10.1371/journal.pone.0208945 30540850

12. Luo Y., Zhou B., Van Haute S., Nou X., Zhang B., Teng Z., et al. (2018). Association between bacterial survival and free chlorine concentration during commercial fresh-cut produce wash operation. Food Microbiology, 70, 120–128. 10.1016/j.fm.2017.09.013 29173618

13. Zhou B., Luo Y., Turner E. R., Wang Q., & Schneider K. R. (2014). Evaluation of current industry practices for maintaining tomato dump tank water quality during packinghouse operations. Journal of Food Processing and Preservation, 38(6), 2201–2208. https://doi.org/10.1111/jfpp.12200

14. LeChevallier M., Evans T. M., & Seidler R. (1981). Effect of turbidity on chlorination efficiency and bacterial persistence in drinking water. Applied and Environmental Microbiology, 42(1), 159–167. 7259162

15. Moda E. M., Horii J., & Spoto M. (2005). Edible mushroom Pleurotus sajor-caju production on washed and supplemented sugarcane bagasse. Scientia Agricola, 62(2) 127–132. https://doi.org/10.1590/S0103-90162005000200006

16. US EPA (1971). Method 160.2: residue, non-filterable (gravimetric dried at 103–105°C). Methods for the chemical analysis of water and wastes. https://www.nemi.gov/methods/method_summary/5213/ Accessed 16 October 2018.

17. Hach (2014). Method No. 10236, Oxygen Demand, Chemical for water and wastewater. Mercury-free reactor digestion method. Water analysis handbook. https://www.hach.com/wah Accessed 16 October 2018.

18. Hach (2015). Method No. 10223, Chlorine Demand/Requirement. Water analysis handbook. https://www.hach.com/wah Accessed 16 October 2018.

19. Zhang B., Luo Y., Zhou B., Wang Q., & Millner P. D. (2015). A novel microfluidic mixer-based approach for determining inactivation kinetics of Escherichia coli O157:H7 in chlorine solutions. Food Microbiology, 49, 152–160. 10.1016/j.fm.2015.01.013 25846925

20. Kramer M. (2005). R2 Statistics for Mixed Models. Conference on Applied Statistics in Agriculture, https://doi.org/10.4148/2475-7772.1142

21. Luo Y. (2007). Fresh-cut produce wash water reuse affects water quality and packaged product quality and microbial growth in romaine lettuce. HortScience, 42(6), 1413–1419.

22. Weng S., Luo Y., Li J., Zhou B., Jacangelo J. G., & Schwab K. J. (2016). Assessment and speciation of chlorine demand in fresh-cut produce wash water. Food Control, 60, 543–551. https://doi.org/10.1016/j.foodcont.2015.08.031

23. USDA ARS, Nutrient Data Laboratory (2016). USDA National Nutrient Database for Standard Reference, release 28. https://ndb.nal.usda.gov/ndb/ Accessed 16 October 2018.

24. Gazzola D., Van Sluyter S.C., Curioni A., Waters E.J., Marangon M. Roles of proteins, polysaccharides, and phenolics in haze formation in white wine via reconstitution experiments. Journal of agricultural and food chemistry. 2012 Oct 11;60(42):10666–73. 10.1021/jf302916n 22998638

25. Llorach R., Martínez-Sánchez A., Tomás-Barberán F. A., Gil M. I., & Ferreres F. (2008). Characterisation of polyphenols and antioxidant properties of five lettuce varieties and escarole. Food Chemistry, 108(3), 1028–1038. 10.1016/j.foodchem.2007.11.032 26065768

26. Deborde M., & von Gunten U. (2008). Reactions of chlorine with inorganic and organic compounds during water treatment—Kinetics and mechanisms: A critical review. Water Research, 42(1), 13–51. https://doi.org/10.1016/j.watres.2007.07.025

27. Pattison D. I., & Davies M. J. (2001). Absolute rate Constants for the Reaction of Hypochlorous Acid with Protein Side Chains and Peptide Bonds. Chemical Research in Toxicology, 14(10), 1453–1464. https://doi.org/10.1021/tx0155451 11599938

28. Aletor O., Oshodi A. A., & Ipinmoroti K. (2002). Chemical composition of common leafy vegetables and functional properties of their leaf protein concentrates. Food Chemistry, 78(1), 63–68. https://doi.org/10.1016/S0308-8146(01)00376-4

29. Leja M., Kamińska I., Kramer M., Maksylewicz-Kaul A., Kammerer D., Carle R., et al. (2013). The content of phenolic compounds and radical scavenging activity varies with carrot origin and root color. Plant Foods for Human Nutrition, 68(2),163–170. 10.1007/s11130-013-0351-3 23613033

30. Mattila P., & Hellström J. (2007). Phenolic acids in potatoes, vegetables, and some of their products. Journal of Food Composition and Analysis, 20(3), 152–160. https://doi.org/10.1016/j.jfca.2006.05.007

31. Cardador M.J., Gallego M. Effect of the chlorinated washing of minimally processed vegetables on the generation of haloacetic acids. Journal of agricultural and food chemistry. 2012 Jul 13;60(29):7326–32. 10.1021/jf302591u 22747435

32. Van Haute S., Sampers I., Holvoet K, Uyttendaele M. Physicochemical quality and chemical safety of chlorine as a reconditioning agent and wash water disinfectant for fresh-cut lettuce washing. Appl. Environ. Microbiol. 2013 May 1;79(9):2850–61. 10.1128/AEM.03283-12 23396332

33. Bornhorst E.R., Luo Y., Park E., Vinyard B.T., Nou X., Zhou B., et al. Immersion-free, single-pass, commercial fresh-cut produce washing system: An alternative to flume processing. Postharvest biology and technology. 2018 Dec 1;146:124–33. https://doi.org/10.1016/j.postharvbio.2018.08.008

34. Van Haute S., Luo Y., Sampers I., Mei L., Teng Z., Zhou B., et al. Can UV absorbance rapidly estimate the chlorine demand in wash water during fresh-cut produce washing processes?. Postharvest Biology and Technology. 2018 Aug 1;142:19–27. https://doi.org/10.1016/j.postharvbio.2018.02.002

35. Guerrero P., Kerry J.P., de la Caba K. FTIR characterization of protein–polysaccharide interactions in extruded blends. Carbohydrate polymers. 2014 Oct 13;111:598–605. 10.1016/j.carbpol.2014.05.005 25037393


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