{"id":15569,"date":"2026-04-21T13:00:07","date_gmt":"2026-04-21T13:00:07","guid":{"rendered":"https:\/\/lequia-udg.com\/2026\/04\/21\/development-of-an-integrated-cfd-and-biokinetic-model-of-a-full-scale-oxidation-ditch-a-case-study-of-la-almunia-wwtp\/"},"modified":"2026-04-21T13:29:47","modified_gmt":"2026-04-21T13:29:47","slug":"development-of-an-integrated-cfd-and-biokinetic-model-of-a-full-scale-oxidation-ditch-a-case-study-of-la-almunia-wwtp","status":"publish","type":"post","link":"https:\/\/lequia-udg.com\/ca\/2026\/04\/21\/development-of-an-integrated-cfd-and-biokinetic-model-of-a-full-scale-oxidation-ditch-a-case-study-of-la-almunia-wwtp\/","title":{"rendered":"Development of an integrated CFD and biokinetic model of a full-scale oxidation ditch: a case study of La Almunia WWTP"},"content":{"rendered":"\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t

\r\n\t\t\t\r\n\t\t\t\tCarla V\u00e1zquez G\u00f3mara\r\n\t\t\t\r\n\t\t\t<\/h4>\r\n\t\t

\r\n\t\t\t\r\n\t\t\t\tDevelopment of an integrated CFD and biokinetic model of a full-scale oxidation ditch: a case study of La Almunia WWTP\r\n\t\t\t\r\n\t\t\t<\/h2>\r\n\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Les estacions depuradores d\u2019aig\u00fces residuals afronten actualment una pressi\u00f3 creixent en termes reguladors i energ\u00e8tics. Els nous l\u00edmits europeus de nitrogen, f\u00f2sfor i microcontaminants exigeixen un rendiment de depuraci\u00f3 m\u00e9s elevat, alhora que es busca reduir el consum energ\u00e8tic. Aquestes demandes posen de manifest un repte persistent: tot i d\u00e8cades de modelitzaci\u00f3, moltes eines continuen representant els reactors com si fossin tancs perfectament barrejats. A escala real, per\u00f2, els reactors presenten patrons de circulaci\u00f3 complexos, gradients d\u2019oxigen i zones amb activitat biol\u00f2gica molt diferent. Sense entendre aquestes heterogene\u00eftats internes, \u00e9s dif\u00edcil optimitzar l\u2019operaci\u00f3 o reduir el consum d\u2019aireaci\u00f3 i mescla, que continuen sent les parts m\u00e9s intensives en energia del proc\u00e9s. Aquesta tesi aborda aquesta necessitat mitjan\u00e7ant l\u2019aplicaci\u00f3 detallada de la Din\u00e0mica de Fluids Computacional (CFD) combinada amb els Models de Fangs Actius (ASM) a escala real, mostrant com aquesta integraci\u00f3 pot revelar el comportament hidrodin\u00e0mic i biol\u00f2gic dels reactors en funcionament. El treball se centra en un canal d\u2019oxidaci\u00f3 a escala real a l\u2019EDAR de La Almunia (Saragossa), i en la construcci\u00f3 del model es va posar especial atenci\u00f3 a aconseguir un equilibri entre la precisi\u00f3 (capturant els detalls geom\u00e8trics i operatius m\u00e9s rellevants) i el cost computacional, per tal de desenvolupar una eina pr\u00e0ctica aplicable a casos reals. El model hidrodin\u00e0mic validat va reproduir les principals caracter\u00edstiques del flux observats in situ, com ara les velocitats m\u00e9s elevades al canal exterior i la pres\u00e8ncia de zones de recirculaci\u00f3 i de baixa velocitat. Aquest coneixement es va utilitzar per avaluar diferents configuracions dels agitadors. Els resultats van mostrar que la pot\u00e8ncia total de mescla es podia reduir aproximadament un 30% sense superar els l\u00edmits habitualment acceptats per al volum de zones de baixa velocitat, fet que indica un potencial estalvi energ\u00e8tic sense comprometre l\u2019estabilitat del proc\u00e9s. En l\u2019\u00faltima part del treball, el model biocin\u00e8tic ASM2d es va integrar dins de l\u2019entorn CFD per simular l\u2019evoluci\u00f3 de l\u2019oxigen i dels principals contaminants al llarg del reactor. El model va revelar gradients espacials que els models convencionals no capturen, incloent-hi la coexist\u00e8ncia de zones aer\u00f2bies i an\u00f2xiques durant l\u2019aireaci\u00f3. L\u2019estudi tamb\u00e9 va avaluar la representativitat de la sonda d\u2019oxigen dissolt de la planta i va trobar que la ubicaci\u00f3 actual tendeix a sobreestimar lleugerament la concentraci\u00f3 mitjana d\u2019oxigen de la zona airejada. Es van detectar punts propers amb difer\u00e8ncies de fins a 1 mg\/L, una desviaci\u00f3 significativa que pot influir en el control del proc\u00e9s i que refor\u00e7a la import\u00e0ncia d\u2019escollir adequadament la posici\u00f3 de la sonda. En conjunt, la tesi demostra com la modelitzaci\u00f3 integrada CFD\u2013ASM2d a escala real pot millorar la comprensi\u00f3 del proc\u00e9s, identificar limitacions de mescla i transfer\u00e8ncia, i donar suport a decisions operatives m\u00e9s eficients energ\u00e8ticament.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tAdditional Info<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t
\n\n\n\n\n\n
Autora:<\/strong><\/td>\nCarla V\u00e1zquez G\u00f3mara<\/td>\n<\/tr>\n
Supervisors:<\/strong><\/td>\nJes\u00fas Colprim and Maria del Mar Mic\u00f3 (ACCIONA)<\/td>\n<\/tr>\n
Data de defensa:<\/strong><\/td>\n21-01-2026<\/td>\n<\/tr>\n
Enlla\u00e7:<\/strong><\/td>\nhttps:\/\/hdl.handle.net\/10803\/697029<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t
\n\t\t\t
<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Autora: Carla V\u00e1zquez G\u00f3mara<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"footnotes":""},"categories":[68],"tags":[],"class_list":["post-15569","post","type-post","status-publish","format-standard","hentry","category-doctoral-theses_ca"],"_links":{"self":[{"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/posts\/15569","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/comments?post=15569"}],"version-history":[{"count":5,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/posts\/15569\/revisions"}],"predecessor-version":[{"id":15596,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/posts\/15569\/revisions\/15596"}],"wp:attachment":[{"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/media?parent=15569"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/categories?post=15569"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/tags?post=15569"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}