Phosphorus Dynamics, Mass Balance and Mineralization in Aquaponics Systems

Persistent Link:
http://hdl.handle.net/10150/620832
Title:
Phosphorus Dynamics, Mass Balance and Mineralization in Aquaponics Systems
Author:
da Silva Cerozi, Brunno
Issue Date:
2016
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:
This study involves tracing inputs, partitioning, and outputs of phosphorus (P) through an aquaponics system. A mathematical model was developed to describe the dynamics of phosphorus in an aquaponics nutrient solution, and to maximize P use efficiency and minimize P waste. We assessed the influence of pH on the availability and speciation of phosphorus in an aquaponics nutrient solution. By using Visual MINTEQ, a freeware chemical equilibrium model for the calculation of element speciation, solubility equilibria, and sorption for natural waters, it was discovered that high pH values favor the formation of calcium phosphate complexes, decreasing the concentration of free phosphorus in aquaponics nutrient solutions. In addition, the mineralization of organic phosphorus in aquaponics systems was evaluated using treatments with phytase supplementation to fish diets, and incorporation of a microbial inoculant in the aquaponics nutrient solution. Overall, dietary phytase and microorganisms promoted phosphorus mineralization and enhanced phosphorus utilization in aquaponics systems. In the end, we conclude that aquaponics systems can keep the same growth performance and quality of vegetable crops grown in conventional systems when the availability and dynamics of phosphorus are well managed.
Type:
text; Electronic Dissertation
Keywords:
Bacillus; Dynamics; Efficiency; Phosphorus; Phytase; Soil, Water & Environmental Science; Aquaponics
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Soil, Water & Environmental Science
Degree Grantor:
University of Arizona
Advisor:
Fitzsimmons, Kevin

Full metadata record

DC FieldValue Language
dc.language.isoen_USen
dc.titlePhosphorus Dynamics, Mass Balance and Mineralization in Aquaponics Systemsen_US
dc.creatorda Silva Cerozi, Brunnoen
dc.contributor.authorda Silva Cerozi, Brunnoen
dc.date.issued2016-
dc.publisherThe University of Arizona.en
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
dc.description.abstractThis study involves tracing inputs, partitioning, and outputs of phosphorus (P) through an aquaponics system. A mathematical model was developed to describe the dynamics of phosphorus in an aquaponics nutrient solution, and to maximize P use efficiency and minimize P waste. We assessed the influence of pH on the availability and speciation of phosphorus in an aquaponics nutrient solution. By using Visual MINTEQ, a freeware chemical equilibrium model for the calculation of element speciation, solubility equilibria, and sorption for natural waters, it was discovered that high pH values favor the formation of calcium phosphate complexes, decreasing the concentration of free phosphorus in aquaponics nutrient solutions. In addition, the mineralization of organic phosphorus in aquaponics systems was evaluated using treatments with phytase supplementation to fish diets, and incorporation of a microbial inoculant in the aquaponics nutrient solution. Overall, dietary phytase and microorganisms promoted phosphorus mineralization and enhanced phosphorus utilization in aquaponics systems. In the end, we conclude that aquaponics systems can keep the same growth performance and quality of vegetable crops grown in conventional systems when the availability and dynamics of phosphorus are well managed.en
dc.typetexten
dc.typeElectronic Dissertationen
dc.subjectBacillusen
dc.subjectDynamicsen
dc.subjectEfficiencyen
dc.subjectPhosphorusen
dc.subjectPhytaseen
dc.subjectSoil, Water & Environmental Scienceen
dc.subjectAquaponicsen
thesis.degree.namePh.D.en
thesis.degree.leveldoctoralen
thesis.degree.disciplineGraduate Collegeen
thesis.degree.disciplineSoil, Water & Environmental Scienceen
thesis.degree.grantorUniversity of Arizonaen
dc.contributor.advisorFitzsimmons, Kevinen
dc.contributor.committeememberFitzsimmons, Kevinen
dc.contributor.committeememberDontsova, Katerinaen
dc.contributor.committeememberRich, Virginiaen
dc.contributor.committeememberKubota, Chierien
dc.contributor.committeememberWaller, Peteren
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