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dc.contributor.advisorColόn-Burgos, Guillermo
dc.contributor.authorAcevedo-Morantes, María T.
dc.date.accessioned2018-05-16T16:56:04Z
dc.date.available2018-05-16T16:56:04Z
dc.date.issued2004
dc.identifier.urihttps://hdl.handle.net/20.500.11801/617
dc.description.abstractThe removal of nitrate and potassium from wheat leachate solution was studied using an electrolytic cell in batch recirculation mode for use in advance life support systems (ALSS). The ALSS or CELSS (Controlled Ecological Life Support System) are systems developed to provide all the required basic human needs for long-term space missions. High nitrate and potassium removals were obtained at 5, 6, 7, 8 and 9 volts. Anions removals over 90% were obtained after 200 minutes of operation at these constant applied voltages. A maximum nitrate and potassium removal of 100 % and 99.82%, respectively, was obtained at 9 volts. During the electrolytic cell operation, the removal of monovalent anions was found to be higher than divalent and trivalent ones. This is different to the selectivity of monovalent and divalent cations found when use cation-exchange membrane, the removal of monovalent and divalent cations was very similar. Electrical resistance measurements showed that under constant applied voltage, anion membrane fouling decreased with increasing voltage. This is due to the mobility of anion organic molecules at high voltages. It was also found that the cation membrane fouling increased with applied voltage and that, at low voltages, the fouling was absent. It is postulated that these results from a low concentration of cation organic molecules and to the high molecular weight of this organics that limits their mobility through of solution.en_US
dc.language.isoenen_US
dc.subjectInedible biomass leachateen_US
dc.subjectFouling effecten_US
dc.subjectElectrodialysisen_US
dc.subject.lcshNitrates--Separation.en_US
dc.subject.lcshElectrodialysis.en_US
dc.subject.lcshSeparation (Technology)en_US
dc.subject.lcshSurfaces (Technology)en_US
dc.subject.lcshFouling.en_US
dc.subject.lcshBiomass chemicals.en_US
dc.titleSeparational purification of nitrate from inedible biomass leachate by electrodialysis: fouling effecten_US
dc.typeThesisen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2004 María Teresa Acevedo Morantesen_US
dc.contributor.committeeSaliceti Piazza, Lorenzo
dc.contributor.committeeRomán, Félix
dc.contributor.representativePadilla, Ingrid
thesis.degree.levelM.S.en_US
thesis.degree.disciplineChemical Engineeringen_US
dc.contributor.collegeCollege of Engineeringen_US
dc.contributor.departmentDepartment of Chemical Engineeringen_US
dc.description.graduationYear2004en_US


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    Items included under this collection are theses, dissertations, and project reports submitted as a requirement for completing a graduate degree at UPR-Mayagüez.

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