Coupled photochemical-biological system to treat biorecalcitrant wastewaters

dc.contributor
Universitat de Barcelona. Departament d'Enginyeria Química i Metal·lúrgia
dc.contributor.author
Bacardit Peñarroya, Jordi
dc.date.accessioned
2011-04-12T13:34:45Z
dc.date.available
2007-07-19
dc.date.issued
2007-07-06
dc.date.submitted
2007-07-19
dc.identifier.isbn
9788469091388
dc.identifier.uri
http://www.tdx.cat/TDX-0719107-132020
dc.identifier.uri
http://hdl.handle.net/10803/1533
dc.description.abstract
Advanced Oxidation Processes (AOPs) are suitable for achieving the complete mineralization of organic pollutants in wastewaters, since they are based on the generation of a powerful non-selective chemical oxidant. A major drawback of AOPs is that they involve high operating costs if high levels of mineralization are endeavoured. Integration of an AOP with a biological treatment has demonstrated to be a suitable alternative, since it combines the capacity of the AOP, in this case Photo-Fenton, to enhance biodegradability, with a biological treatment such as a Sequencing Batch Biofilter Reactor (SBBR), which operating costs are lower.<br/><br/>Photo-Fenton (Ph-F) process is carried out by irradiating the system with ultraviolet (UV) and/or visible (Vis) light. In Fenton processes, by combination of hydrogen peroxide (H2O2) as a reagent and iron ions (Fe2+ for example) as catalyst in acid medium, highly oxidant species are generated.<br/><br/>According to the results, most of the studied parameters may be written as a function of [H2O2]0, which means that temperature and [Fe2+]0 do not affect significantly the results. Moreover, a subsequent scale-up of the process shows that degradation follow very similar tendencies and shows similar results.<br/><br/>It has been observed that the efficiency of oxidation follows a tendency directly related to the amount of H2O2 applied. An innovative description of the process is their modelling regarding the evolution of COD and BOD5 over the oxidation process or depending on the amount of H2O2 applied. The models show good fitting properties, and they appear to be a good basis for more precise modelling of the system.<br/><br/>Regarding the integration of both processes, the best operating conditions consists of first treating the solution by Ph-F with 500 mg.L-1 of [H2O2]0 and 10 mg.L-1 of [Fe2+]0 at 27 ºC. The resulting product is then treated in the SBBR for 8 hours of time. More than 90 % of mineralization is achieved. The bioreactor show high resistance when is exposed to toxic shock load. Concerning control possibilities, monitoring the Oxygen Uptake Rate (OUR) by in-situ respirometry is suggested to be a good parameter, since it is a direct measurement of bacterial activity.
cat
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Universitat de Barcelona
dc.rights.license
ADVERTIMENT. L'accés als continguts d'aquesta tesi doctoral i la seva utilització ha de respectar els drets de la persona autora. Pot ser utilitzada per a consulta o estudi personal, així com en activitats o materials d'investigació i docència en els termes establerts a l'art. 32 del Text Refós de la Llei de Propietat Intel·lectual (RDL 1/1996). Per altres utilitzacions es requereix l'autorització prèvia i expressa de la persona autora. En qualsevol cas, en la utilització dels seus continguts caldrà indicar de forma clara el nom i cognoms de la persona autora i el títol de la tesi doctoral. No s'autoritza la seva reproducció o altres formes d'explotació efectuades amb finalitats de lucre ni la seva comunicació pública des d'un lloc aliè al servei TDX. Tampoc s'autoritza la presentació del seu contingut en una finestra o marc aliè a TDX (framing). Aquesta reserva de drets afecta tant als continguts de la tesi com als seus resums i índexs.
dc.source
TDX (Tesis Doctorals en Xarxa)
dc.subject
Processos d'Oxidació Avançada (POA)
dc.subject
Compostos orgànics no-biodegradables
dc.subject
Residus industrials
dc.subject
Tractament d'aigües residuals
dc.subject.other
Ciències Experimentals i Matemàtiques
dc.title
Coupled photochemical-biological system to treat biorecalcitrant wastewaters
dc.type
info:eu-repo/semantics/doctoralThesis
dc.type
info:eu-repo/semantics/publishedVersion
dc.subject.udc
54
cat
dc.contributor.authoremail
jordi.bacardit@gmail.com
dc.contributor.director
Chamarro Aguilera, Esther
dc.contributor.director
Esplugas Vidal, Santiago
dc.rights.accessLevel
info:eu-repo/semantics/openAccess
cat
dc.identifier.dl
B.53063-2007


Documents

01.JBP_abstract_and_index.pdf

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02.JBP_Introduction_and_Methods.pdf

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03.JBP_Results_and_Conclusions.pdf

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04.JBP_References_and_lists.pdf

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05.JBP_Summary_in_Catalan.pdf

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