Microbiological Water Quality in Irrigation Water, Treated Wastewater, and Untreated Wastewater and Its Impact on Vegetables in Sonora, Mexico

Persistent Link:
http://hdl.handle.net/10150/195909
Title:
Microbiological Water Quality in Irrigation Water, Treated Wastewater, and Untreated Wastewater and Its Impact on Vegetables in Sonora, Mexico
Author:
Gortares-Moroyoqui, Pablo
Issue Date:
2007
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
In Mexico, wastewater recycling is an important alternative source of water, particularly in arid regions like the state of Sonora, Mexico. In El Valle del Yaqui, Sonora, Mexico, where 500 million m3 per year of wastewater is available for recycling in agriculture activities . The main objective of the three studies presented in this dissertation was to assess the microbial water quality of surface water, untreated wastewater, and treated wastewater for produce irrigation, as well as the impact of microbial water quality on vegetable contamination. The results suggest that the three sources of water meet Mexican and international guidelines for use in production of food crops.Despite wide differences in the concentration of bacterial indicators (Escherichia coli, Clostridium perfringens) and enteric pathogens (Cryptosporidium, Giardia, and enteroviruses) in the various types of water studied there was little impact on contamination of the produce studied (carrots, lettuce, tomatoes, and peppers) at harvest. Apparently, the time between the last irrigation event and harvesting was sufficient to allow for die-off of enteric organisms that may have contaminated the produce.
Type:
text; Electronic Dissertation
Keywords:
irrigation water; wastewater; treated wastewater; vegetables; E. co.i; water quality
Degree Name:
PhD
Degree Level:
doctoral
Degree Program:
Soil, Water & Environmental Science; Graduate College
Degree Grantor:
University of Arizona
Advisor:
Gerba, Charles P
Committee Chair:
Gerba, Charles P

Full metadata record

DC FieldValue Language
dc.language.isoENen_US
dc.titleMicrobiological Water Quality in Irrigation Water, Treated Wastewater, and Untreated Wastewater and Its Impact on Vegetables in Sonora, Mexicoen_US
dc.creatorGortares-Moroyoqui, Pabloen_US
dc.contributor.authorGortares-Moroyoqui, Pabloen_US
dc.date.issued2007en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractIn Mexico, wastewater recycling is an important alternative source of water, particularly in arid regions like the state of Sonora, Mexico. In El Valle del Yaqui, Sonora, Mexico, where 500 million m3 per year of wastewater is available for recycling in agriculture activities . The main objective of the three studies presented in this dissertation was to assess the microbial water quality of surface water, untreated wastewater, and treated wastewater for produce irrigation, as well as the impact of microbial water quality on vegetable contamination. The results suggest that the three sources of water meet Mexican and international guidelines for use in production of food crops.Despite wide differences in the concentration of bacterial indicators (Escherichia coli, Clostridium perfringens) and enteric pathogens (Cryptosporidium, Giardia, and enteroviruses) in the various types of water studied there was little impact on contamination of the produce studied (carrots, lettuce, tomatoes, and peppers) at harvest. Apparently, the time between the last irrigation event and harvesting was sufficient to allow for die-off of enteric organisms that may have contaminated the produce.en_US
dc.typetexten_US
dc.typeElectronic Dissertationen_US
dc.subjectirrigation wateren_US
dc.subjectwastewateren_US
dc.subjecttreated wastewateren_US
dc.subjectvegetablesen_US
dc.subjectE. co.ien_US
dc.subjectwater qualityen_US
thesis.degree.namePhDen_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineSoil, Water & Environmental Scienceen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorGerba, Charles Pen_US
dc.contributor.chairGerba, Charles Pen_US
dc.contributor.committeememberKarpiscak, Martinen_US
dc.contributor.committeememberPepper, Ianen_US
dc.contributor.committeememberReynolds, Kelly A.en_US
dc.identifier.proquest2293en_US
dc.identifier.oclc659748147en_US
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