5 research outputs found
Eliminaci贸 simult脿nia de f貌sfor i nitrogen en aig眉es residuals, utilitzant microorganismes DPAO en un reactor discontinu seq眉encial (SBR)
En aquest estudi es realitz脿 eliminaci贸 biol貌gica simult脿nia de f貌sfor i nitrogen en un Reactor Discontinu Seq眉encial (SBR), el qual cont茅 una biomassa enriquida amb Organismes Desnitrificadors Acumuladors de F貌sfor (DPAO) que utilitzen com a 煤nica font de carboni l'脿cid propi貌nic i com acceptors d'electrons: nitrit en la fase an貌xica i oxigen en l'aer貌bica. L'SBR opera amb cicle de 8 h alternant fase anaer貌bica, an貌xica i aer貌bica. El seguiment del sistema es realitz脿 mitjan莽ant mesures on-line (titrimetria) i off-line (quantificaci贸 d'脿cid propi貌nic, nitrit i f貌sfor), utilitzant l'HPLC per quantificar l'脿cid propi貌nic i cromatografia i貌nica per les mesures de nitrit i f貌sfor. Amb aquest sistema es pret茅n augmentar la captaci贸 de f貌sfor en la fase an貌xica fet que s'aconsegu铆 realitzant diferents canvis al reactor per tal de maximitzar el consum de nitrit en aquesta fase, ja fos allargant el temps de fase o augmentant la concentraci贸 de biomassa. Aquest experiment ha suposat un augment de la captaci贸 de f貌sfor (33 mg P-PO4 3-/L), de l'eliminaci贸 neta de f貌sfor (17 mg P-PO4 3-/L) i de consum de nitrit (27 mg N-NO2-). Per altra banda, es pretenia veure els efectes a curt termini de l'eliminaci贸 de la fase aer貌bica a partir del seguiment de 2 cicle puntuals i d'un cicle de 32 h sense fase aer貌bica. En ambd贸s casos s'aconsegu铆 una eliminaci贸 neta de f貌sfor.En este estudio se llev贸 a cabo eliminaci贸n biol贸gica simultanea de f贸sforo y nitr贸geno en un reactor discontinuo secuencial (SBR) el cual conten铆a una biomasa enriquecida con Organismos Desnitrificantes Acumuladores de F贸sforo (DPAO) que utilizan como 煤nica fuente de carbono el acido propi贸nico y como aceptor de electrones: nitrito en la fase an贸xica y ox铆geno en la aer贸bica. El seguimiento del sistema se realiz贸 mediante medidas on-line (titrimetria) y off-line (cuantificaci贸n de acido propi贸nico, nitrito y f贸sforo), utilitzando HPLC para cuantificar el acido propi贸nico i cromatograf铆a i贸nica para las medidas de nitrito y f贸sforo. Con este sistema se pretende augmentar la captaci贸n de f贸sforo en la fase an贸xica. Para conseguirlo se realizan diferentes cambios en el sistema para maximizar el consumo de nitrito en esta fase, ya sea alargando el tiempo de fase o aumentando la biomasa. Este experimento ha supuesto un aumento de la captaci贸n de f贸sforo (33 mg P-PO4 3-/L), de la eliminaci贸n neta de f贸sforo (17 mg P-PO4 3-/L) y del consumo de nitrito (27 mg N-NO2-). Por otro lado, se pretend铆a ver los efectos a corto plazo de la eliminaci贸n de la fase aer贸bica a partir del seguimiento de 2 ciclos puntuales y de un ciclo de 32 h sin fase aer贸bica. En ambos casos se consigui贸 una eliminaci贸n neta de f贸sforo.In this study, simultaneous biological phosphorus and nitrogen removal was performed in a Sequential Batch Reactor (SBR), which contained a biomass enriched with Denitrifying Phosphorus Accumulating Organisms (DPAO). These organisms are able to use propionic acid as carbon source and nitrite or oxygen as electron acceptors. The system was monitored with on-line measurements (respirometry and titrimetry) and off-line measurementss (propionic acid, nitrite and phosphorus) using a HPLC and an ionic chromatography equipment. The objective of the system is to increase the amount of phosphorus uptaken under anoxic conditions. For this purpose, the system operation was modified by increasing the anoxic phase length and increasing the biomass. This experiment has resulted in the increase of phosphorus uptake (33 mg P-PO4 3-/L), net phosphorus removal (17 mg P-PO4 3-/L) and nitrite consumption (27 mg N-NO2-). On the other hand, the short-term effect of the suppression of the aerobic phase was studied with two cycles and a period of 32 h. In both cases, net phosphorus elimination was obtained
Characterisation and adding value to agro-forestry biomass products obtained from thermochemical processes
L鈥檃profitament de biomassa per produir biocombustibles i bioproductes a partir de fonts renovables est脿 despertant un gran inter猫s en els 煤ltims anys motivat per la oportunitat de convertir un residu en una font prim脿ria d鈥檈nergia f脿cilment accessible a escala local i regional. Catalunya 茅s una regi贸 amb una gran massa forestal i que genera molts residus agr铆coles. L鈥檃profitament d鈥檃questa biomassa permet la millora del sector agro-forestal, la preservaci贸 i conservaci贸 del paisatge tradicional, reduir el risc d鈥檌ncendis i incrementa la diversificaci贸 energ猫tica reduint la depend猫ncia dels combustibles f貌ssils i mitigant els efectes del escalfament global. En aquest context, l鈥檕bjectiu principal d鈥檃questa tesi 茅s la valoritzaci贸 de residus de biomassa agro-forestal com a biocombustibles d鈥檃lta densitat energ猫tica mitjan莽ant processos de torrefacci贸 i pir貌lisis per tal d鈥檃van莽ar cap a un model energ猫tic m茅s sostenible.
En primer lloc, s鈥檃valu脿 la valoritzaci贸 dels residus de biomassa agr脿ria com a pellets torrefactes mitjan莽ant un proc茅s de torrefacci贸 participant en una prova pilot desenvolupada en una zona rural per tal de demostrar la viabilitat t猫cnica i econ貌mica d鈥檌mplementar aquest proc茅s com a una estrat猫gia local d鈥檃profitament d鈥檃quest residu, en el que es coneix com economia circular i bioeconomia. En primer lloc, es caracteritz脿 la biomassa original i els productes de torrefacci贸. Els pellets torrefactes obtinguts tenen caracter铆stiques dins est脿ndards europeus del pellets comercialitzables. El l铆quid de torrefacci贸 茅s un producte aqu贸s amb alts continguts d鈥櫭燾id ac猫tic i furfural, sent un potencial pesticida biodegradable o un protector de fusta. A m茅s a m茅s, es demostr脿 la viabilitat econ貌mica d鈥檌mplementar una planta m貌bil de torrefacci贸 en un zona rural.
El bio-oil 茅s un producte l铆quid procedent de la pir貌lisi rapida de la biomassa amb un gran potencial com a combustible l铆quid i plataforma qu铆mica per a la obtenci贸 de bio-productes, sent aix铆 una potencial mat猫ria prima en una biorefineria. Actualment, el bio-oil 茅s un biocombustible pobre degut a la seva corrosivitat, alta viscositat, alt contingut en oxigen i la seva inestabilitat t猫rmica i qu铆mica. Per aquest motiu, es requereixen processos de millora d鈥檃quest producte, encara que aquest redueixen la seva viabilitat econ貌mica. En aquest context, dos processos de millora del bio-oil han estat estudiats utilitzant processos amb un consum energ猫tic assumible aprofitant la temperatura de sortida del bio-oil durant el proc茅s de producci贸 i el temps d鈥檈mmagatzematge. En primer lloc, es caracteritz脿 el bio-oil i s鈥檃valu脿 un m猫tode de quantificaci贸 i identificaci贸 de la composici贸 qu铆mica del bio-oil mitjan莽ant l鈥檃n脿lisi per GC-MS per tal d鈥檃conseguir una millor caracteritzaci贸 d鈥檃quest producte aix铆 com la monitoritzaci贸 dels canvis qu铆mics que puguin tenir lloc durant els processos de millora. Posteriorment, s鈥檃valu脿 un proc茅s catal铆tic de millora del bio-oil utilitzant bentonites i zeolites a 60 潞C. Aquest proc茅s mostr脿 una reducci贸 de l鈥檃cidesa del bio-oil encara que no degut a la cat脿lisi de reaccions sin贸 al car脿cter b脿sic d'aquests materials a aquesta temperatura. Finalment, nous processos d鈥檋idrogenaci贸 del bio-oil a temperatura ambient aprofitant l鈥檃lta reactivitat de l鈥檋idrogen naixent han estat avaluats per tal de reduir el contingut d鈥檕xigen d鈥檃quest i augmentar el seu poder calor铆fic. L鈥檋idrogen naixent ha estat produ茂t in situ via l鈥檕xidaci贸 d鈥檜n metall utilitzant el bio-oil com a medi 脿cid i via l鈥檈lectr貌lisi de l鈥檃igua continguda en el bio-oil, resultant el primer m猫tode m茅s simple i efectiu. Aix铆, el proc茅s d鈥檋idrogenaci贸 via oxidaci贸 del zinc s鈥檋a realitzat a diferents condicions experimentals mostrant uns resultats molt esperan莽adors ja que s'observen difer猫ncies significatives entre el bio-oil d'abans i de despr茅s del proc茅s de millora.
Per concloure, Aquest treball mostra el potencial, present i futur, de valoritzar residus agro-forestals mitjan莽ant processos termoqu铆mics com a biocombustible i bioproductes.Biomass use to produce biofuels and bio-products from a renewable source is raising a high interest in recent years motivated by the opportunity of converting biomass residues into a primary energy source easily available at local and regional scale. Catalonia is a region with large forest area and generates large amounts of agro-forestry residues. Their use might improve the agro-forestry sector by the preservation and restoration of traditional landscapes, reduce forest fire risk and increase energy diversification reducing fossil fuels dependency and mitigating the global warning effects. In this direction, the main aim of this thesis is to add-value to agro-forestry biomass residues as enhanced biofuels by means of torrefaction and pyrolysis biomass conversion processes in order to move towards a more sustainable energy model.
A study of adding value to agricultural waste biomass as torrefied pellets by means of torrefaction process is performed participating in a pilot scale test carried out in a rural region to demonstrate the technic-economic viability implementing of this process as a local strategy to make use of this residue moving towards a circular and bioeconomy. Firstly, raw and torrefied products are characterised. The obtained torrefied pellets characteristics are within the European law standards of pellets demonstrating they are marketable products. Torrefaction liquid is an aqueous product with high contents of acetic acid and furfural making it a potential biodegradable pesticide or wood preservative. Moreover, the economic viability of implementing this mobile torrefaction plant in a rural region is proved being highly dependent on the scenario considered.
Bio-oil is a liquid product produced by fast pyrolysis process of biomass with a great potential as liquid biofuel product and chemical platform to obtain bio-products, being a potential feedstock from a biorefinery scenarios. Currently, bio-oil is a low value biofuel due to its corrosiveness, high viscosity, high oxygen content and its thermal and chemical instability. Because of that, its upgrading is required to obtain an enhanced product, even though bio-oil upgrading processes reduce the economic viability of bio-oil as a marketable product. In this context, two novel bio-oil upgrading processes are explored to obtain an enhanced bio-oil using reduced energy and resources cost upgrading process in comparison to conventional. Firstly, bio-oil characterisation is performed, as well as it is assessed and reached a reliable quantitative analysis of bio-oil chemical compounds by means of GC-MS to achieve a further characterization of this product and to permit a proper monitoring of bio-oil properties changes during the upgrading processes. Then, it is tested a catalytic upgrading process using bentonite and zeolite HZSM-5 at 60 潞C to avoid the necessity of a bio-oil external heating due to bio-oil coming out of the fast pyrolysis at this temperature. Results show an acidity reduction of treated bio-oil, although a reduced catalytic reaction is observed due to the quick deactivation of these catalysts at this temperature. Finally, novel hydrogenation procedures to hydrogenate bio-oil at ambient temperature in order to reduce its oxygen content and increase its calorific value using the high reactivity of nascent hydrogen are explored. Nascent hydrogen is generated via metal oxidation using bio-oil as acidic medium and via water electrolysis contained in bio-oi resulting nascent hydrogen via zinc metal oxidation the simplest and more effective process relative to the other tested ones. An extended study of this hydrogenation process is assessed at different experimental conditions showing the potentially of this cheap and simple novel hydrogenation process.
In conclusion, this research shows the current and future potential of adding value to agro-forestry waste biomass by means of thermochemical processes as biofuels and bioproducts to move towards a bioeconomy strategy
Eliminaci贸 simult脿nia de f貌sfor i nitrogen en aig眉es residuals, utilitzant microorganismes DPAO en un reactor discontinu seq眉encial (SBR)
En aquest estudi es realitz脿 eliminaci贸 biol貌gica simult脿nia de f貌sfor i nitrogen en un Reactor Discontinu Seq眉encial (SBR), el qual cont茅 una biomassa enriquida amb Organismes Desnitrificadors Acumuladors de F貌sfor (DPAO) que utilitzen com a 煤nica font de carboni l鈥櫭燾id propi貌nic i com acceptors d鈥檈lectrons: nitrit en la fase an貌xica i oxigen en l鈥檃er貌bica. L鈥橲BR opera amb cicle de 8 h alternant fase anaer貌bica, an貌xica i aer貌bica. El seguiment del sistema es realitz脿 mitjan莽ant mesures on-line (titrimetria) i off-line (quantificaci贸 d鈥櫭燾id propi貌nic, nitrit i f貌sfor), utilitzant l鈥橦PLC per quantificar l鈥櫭燾id propi貌nic i cromatografia i貌nica per les mesures de nitrit i f貌sfor. Amb aquest sistema es pret茅n augmentar la captaci贸 de f貌sfor en la fase an貌xica fet que s鈥檃consegu铆
realitzant diferents canvis al reactor per tal de maximitzar el consum de nitrit en aquesta fase, ja fos allargant el temps de fase o augmentant la concentraci贸 de biomassa. Aquest experiment ha suposat un augment de la captaci贸 de f貌sfor (33 mg P-PO4
3-/L), de l鈥檈liminaci贸 neta de f貌sfor (17
mg P-PO4 3-/L) i de consum de nitrit (27 mg N-NO2-). Per altra banda, es pretenia veure els efectes a curt termini de l鈥檈liminaci贸 de la fase aer貌bica a partir del seguiment de 2 cicle puntuals i d鈥檜n cicle de 32 h sense fase aer貌bica. En ambd贸s casos s鈥檃consegu铆 una eliminaci贸 neta de f貌sfor.En este estudio se llev贸 a cabo eliminaci贸n biol贸gica simultanea de f贸sforo y nitr贸geno en un reactor discontinuo secuencial (SBR) el cual conten铆a una biomasa enriquecida con Organismos Desnitrificantes Acumuladores de F贸sforo (DPAO) que utilizan como 煤nica fuente de carbono el acido propi贸nico y como aceptor de electrones: nitrito en la fase an贸xica y ox铆geno en la aer贸bica. El seguimiento del sistema se realiz贸 mediante medidas on-line (titrimetria) y off-line (cuantificaci贸n de acido propi贸nico, nitrito y f贸sforo), utilitzando HPLC para cuantificar el acido
propi贸nico i cromatograf铆a i贸nica para las medidas de nitrito y f贸sforo. Con este sistema se pretende augmentar la captaci贸n de f贸sforo en la fase an贸xica. Para conseguirlo se realizan diferentes cambios en el sistema para maximizar el consumo de nitrito en esta fase, ya sea alargando el tiempo de fase o aumentando la biomasa. Este experimento ha supuesto un aumento de la captaci贸n de f贸sforo (33 mg P-PO4 3-/L), de la eliminaci贸n neta de f贸sforo (17 mg P-PO4 3-/L) y del consumo de nitrito (27 mg N-NO2-). Por otro lado, se pretend铆a ver los efectos a corto plazo de la eliminaci贸n de la fase aer贸bica a partir del seguimiento de 2 ciclos puntuales y de un ciclo de 32 h sin fase aer贸bica. En ambos casos se consigui贸 una eliminaci贸n neta de f贸sforo.In this study, simultaneous biological phosphorus and nitrogen removal was performed in a Sequential Batch Reactor (SBR), which contained a biomass enriched with Denitrifying Phosphorus Accumulating Organisms (DPAO). These organisms are able to use propionic acid as carbon source and nitrite or oxygen as electron acceptors. The system was monitored with on-line measurements (respirometry and titrimetry) and off-line measurementss (propionic acid, nitrite and phosphorus) using a HPLC and an ionic chromatography equipment. The objective of the system is to increase the amount of phosphorus uptaken under anoxic conditions. For this purpose, the system operation
was modified by increasing the anoxic phase length and increasing the biomass. This experiment has resulted in the increase of phosphorus uptake (33 mg P-PO4 3-/L), net phosphorus removal (17 mg P-PO4 3-/L) and nitrite consumption (27 mg N-NO2-). On the other hand, the short-term effect of the
suppression of the aerobic phase was studied with two cycles and a period of 32 h. In both cases, net phosphorus elimination was obtained
Eliminaci贸 simult脿nia de f貌sfor i nitrogen en aig眉es residuals, utilitzant microorganismes DPAO en un reactor discontinu seq眉encial (SBR)
En aquest estudi es realitz脿 eliminaci贸 biol貌gica simult脿nia de f貌sfor i nitrogen en un Reactor Discontinu Seq眉encial (SBR), el qual cont茅 una biomassa enriquida amb Organismes Desnitrificadors Acumuladors de F貌sfor (DPAO) que utilitzen com a 煤nica font de carboni l'脿cid propi貌nic i com acceptors d'electrons: nitrit en la fase an貌xica i oxigen en l'aer貌bica. L'SBR opera amb cicle de 8 h alternant fase anaer貌bica, an貌xica i aer貌bica. El seguiment del sistema es realitz脿 mitjan莽ant mesures on-line (titrimetria) i off-line (quantificaci贸 d'脿cid propi貌nic, nitrit i f貌sfor), utilitzant l'HPLC per quantificar l'脿cid propi貌nic i cromatografia i貌nica per les mesures de nitrit i f貌sfor. Amb aquest sistema es pret茅n augmentar la captaci贸 de f貌sfor en la fase an貌xica fet que s'aconsegu铆 realitzant diferents canvis al reactor per tal de maximitzar el consum de nitrit en aquesta fase, ja fos allargant el temps de fase o augmentant la concentraci贸 de biomassa. Aquest experiment ha suposat un augment de la captaci贸 de f貌sfor (33 mg P-PO4 3-/L), de l'eliminaci贸 neta de f貌sfor (17 mg P-PO4 3-/L) i de consum de nitrit (27 mg N-NO2-). Per altra banda, es pretenia veure els efectes a curt termini de l'eliminaci贸 de la fase aer貌bica a partir del seguiment de 2 cicle puntuals i d'un cicle de 32 h sense fase aer貌bica. En ambd贸s casos s'aconsegu铆 una eliminaci贸 neta de f貌sfor.En este estudio se llev贸 a cabo eliminaci贸n biol贸gica simultanea de f贸sforo y nitr贸geno en un reactor discontinuo secuencial (SBR) el cual conten铆a una biomasa enriquecida con Organismos Desnitrificantes Acumuladores de F贸sforo (DPAO) que utilizan como 煤nica fuente de carbono el acido propi贸nico y como aceptor de electrones: nitrito en la fase an贸xica y ox铆geno en la aer贸bica. El seguimiento del sistema se realiz贸 mediante medidas on-line (titrimetria) y off-line (cuantificaci贸n de acido propi贸nico, nitrito y f贸sforo), utilitzando HPLC para cuantificar el acido propi贸nico i cromatograf铆a i贸nica para las medidas de nitrito y f贸sforo. Con este sistema se pretende augmentar la captaci贸n de f贸sforo en la fase an贸xica. Para conseguirlo se realizan diferentes cambios en el sistema para maximizar el consumo de nitrito en esta fase, ya sea alargando el tiempo de fase o aumentando la biomasa. Este experimento ha supuesto un aumento de la captaci贸n de f贸sforo (33 mg P-PO4 3-/L), de la eliminaci贸n neta de f贸sforo (17 mg P-PO4 3-/L) y del consumo de nitrito (27 mg N-NO2-). Por otro lado, se pretend铆a ver los efectos a corto plazo de la eliminaci贸n de la fase aer贸bica a partir del seguimiento de 2 ciclos puntuales y de un ciclo de 32 h sin fase aer贸bica. En ambos casos se consigui贸 una eliminaci贸n neta de f贸sforo.In this study, simultaneous biological phosphorus and nitrogen removal was performed in a Sequential Batch Reactor (SBR), which contained a biomass enriched with Denitrifying Phosphorus Accumulating Organisms (DPAO). These organisms are able to use propionic acid as carbon source and nitrite or oxygen as electron acceptors. The system was monitored with on-line measurements (respirometry and titrimetry) and off-line measurementss (propionic acid, nitrite and phosphorus) using a HPLC and an ionic chromatography equipment. The objective of the system is to increase the amount of phosphorus uptaken under anoxic conditions. For this purpose, the system operation was modified by increasing the anoxic phase length and increasing the biomass. This experiment has resulted in the increase of phosphorus uptake (33 mg P-PO4 3-/L), net phosphorus removal (17 mg P-PO4 3-/L) and nitrite consumption (27 mg N-NO2-). On the other hand, the short-term effect of the suppression of the aerobic phase was studied with two cycles and a period of 32 h. In both cases, net phosphorus elimination was obtained
Characterisation and adding value to agro-forestry biomass products obtained from thermochemical processes
L'aprofitament de biomassa per produir biocombustibles i bioproductes a partir de fonts renovables est脿 despertant un gran inter猫s en els 煤ltims anys motivat per la oportunitat de convertir un residu en una font prim脿ria d'energia f脿cilment accessible a escala local i regional. Catalunya 茅s una regi贸 amb una gran massa forestal i que genera molts residus agr铆coles. L'aprofitament d'aquesta biomassa permet la millora del sector agro-forestal, la preservaci贸 i conservaci贸 del paisatge tradicional, reduir el risc d'incendis i incrementa la diversificaci贸 energ猫tica reduint la depend猫ncia dels combustibles f貌ssils i mitigant els efectes del escalfament global. En aquest context, l'objectiu principal d'aquesta tesi 茅s la valoritzaci贸 de residus de biomassa agro-forestal com a biocombustibles d'alta densitat energ猫tica mitjan莽ant processos de torrefacci贸 i pir貌lisis per tal d'avan莽ar cap a un model energ猫tic m茅s sostenible. En primer lloc, s'avalu脿 la valoritzaci贸 dels residus de biomassa agr脿ria com a pellets torrefactes mitjan莽ant un proc茅s de torrefacci贸 participant en una prova pilot desenvolupada en una zona rural per tal de demostrar la viabilitat t猫cnica i econ貌mica d'implementar aquest proc茅s com a una estrat猫gia local d'aprofitament d'aquest residu, en el que es coneix com economia circular i bioeconomia. En primer lloc, es caracteritz脿 la biomassa original i els productes de torrefacci贸. Els pellets torrefactes obtinguts tenen caracter铆stiques dins est脿ndards europeus del pellets comercialitzables. El l铆quid de torrefacci贸 茅s un producte aqu贸s amb alts continguts d'脿cid ac猫tic i furfural, sent un potencial pesticida biodegradable o un protector de fusta. A m茅s a m茅s, es demostr脿 la viabilitat econ貌mica d'implementar una planta m貌bil de torrefacci贸 en un zona rural. El bio-oil 茅s un producte l铆quid procedent de la pir貌lisi rapida de la biomassa amb un gran potencial com a combustible l铆quid i plataforma qu铆mica per a la obtenci贸 de bio-productes, sent aix铆 una potencial mat猫ria prima en una biorefineria. Actualment, el bio-oil 茅s un biocombustible pobre degut a la seva corrosivitat, alta viscositat, alt contingut en oxigen i la seva inestabilitat t猫rmica i qu铆mica. Per aquest motiu, es requereixen processos de millora d'aquest producte, encara que aquest redueixen la seva viabilitat econ貌mica. En aquest context, dos processos de millora del bio-oil han estat estudiats utilitzant processos amb un consum energ猫tic assumible aprofitant la temperatura de sortida del bio-oil durant el proc茅s de producci贸 i el temps d'emmagatzematge. En primer lloc, es caracteritz脿 el bio-oil i s'avalu脿 un m猫tode de quantificaci贸 i identificaci贸 de la composici贸 qu铆mica del bio-oil mitjan莽ant l'an脿lisi per GC-MS per tal d'aconseguir una millor caracteritzaci贸 d'aquest producte aix铆 com la monitoritzaci贸 dels canvis qu铆mics que puguin tenir lloc durant els processos de millora. Posteriorment, s'avalu脿 un proc茅s catal铆tic de millora del bio-oil utilitzant bentonites i zeolites a 60 潞C. Aquest proc茅s mostr脿 una reducci贸 de l'acidesa del bio-oil encara que no degut a la cat脿lisi de reaccions sin贸 al car脿cter b脿sic d'aquests materials a aquesta temperatura. Finalment, nous processos d'hidrogenaci贸 del bio-oil a temperatura ambient aprofitant l'alta reactivitat de l'hidrogen naixent han estat avaluats per tal de reduir el contingut d'oxigen d'aquest i augmentar el seu poder calor铆fic. L'hidrogen naixent ha estat produ茂t in situ via l'oxidaci贸 d'un metall utilitzant el bio-oil com a medi 脿cid i via l'electr貌lisi de l'aigua continguda en el bio-oil, resultant el primer m猫tode m茅s simple i efectiu. Aix铆, el proc茅s d'hidrogenaci贸 via oxidaci贸 del zinc s'ha realitzat a diferents condicions experimentals mostrant uns resultats molt esperan莽adors ja que s'observen difer猫ncies significatives entre el bio-oil d'abans i de despr茅s del proc茅s de millora. Per concloure, Aquest treball mostra el potencial, present i futur, de valoritzar residus agro-forestals mitjan莽ant processos termoqu铆mics com a biocombustible i bioproductes.Biomass use to produce biofuels and bio-products from a renewable source is raising a high interest in recent years motivated by the opportunity of converting biomass residues into a primary energy source easily available at local and regional scale. Catalonia is a region with large forest area and generates large amounts of agro-forestry residues. Their use might improve the agro-forestry sector by the preservation and restoration of traditional landscapes, reduce forest fire risk and increase energy diversification reducing fossil fuels dependency and mitigating the global warning effects. In this direction, the main aim of this thesis is to add-value to agro-forestry biomass residues as enhanced biofuels by means of torrefaction and pyrolysis biomass conversion processes in order to move towards a more sustainable energy model. A study of adding value to agricultural waste biomass as torrefied pellets by means of torrefaction process is performed participating in a pilot scale test carried out in a rural region to demonstrate the technic-economic viability implementing of this process as a local strategy to make use of this residue moving towards a circular and bioeconomy. Firstly, raw and torrefied products are characterised. The obtained torrefied pellets characteristics are within the European law standards of pellets demonstrating they are marketable products. Torrefaction liquid is an aqueous product with high contents of acetic acid and furfural making it a potential biodegradable pesticide or wood preservative. Moreover, the economic viability of implementing this mobile torrefaction plant in a rural region is proved being highly dependent on the scenario considered. Bio-oil is a liquid product produced by fast pyrolysis process of biomass with a great potential as liquid biofuel product and chemical platform to obtain bio-products, being a potential feedstock from a biorefinery scenarios. Currently, bio-oil is a low value biofuel due to its corrosiveness, high viscosity, high oxygen content and its thermal and chemical instability. Because of that, its upgrading is required to obtain an enhanced product, even though bio-oil upgrading processes reduce the economic viability of bio-oil as a marketable product. In this context, two novel bio-oil upgrading processes are explored to obtain an enhanced bio-oil using reduced energy and resources cost upgrading process in comparison to conventional. Firstly, bio-oil characterisation is performed, as well as it is assessed and reached a reliable quantitative analysis of bio-oil chemical compounds by means of GC-MS to achieve a further characterization of this product and to permit a proper monitoring of bio-oil properties changes during the upgrading processes. Then, it is tested a catalytic upgrading process using bentonite and zeolite HZSM-5 at 60 潞C to avoid the necessity of a bio-oil external heating due to bio-oil coming out of the fast pyrolysis at this temperature. Results show an acidity reduction of treated bio-oil, although a reduced catalytic reaction is observed due to the quick deactivation of these catalysts at this temperature. Finally, novel hydrogenation procedures to hydrogenate bio-oil at ambient temperature in order to reduce its oxygen content and increase its calorific value using the high reactivity of nascent hydrogen are explored. Nascent hydrogen is generated via metal oxidation using bio-oil as acidic medium and via water electrolysis contained in bio-oi resulting nascent hydrogen via zinc metal oxidation the simplest and more effective process relative to the other tested ones. An extended study of this hydrogenation process is assessed at different experimental conditions showing the potentially of this cheap and simple novel hydrogenation process. In conclusion, this research shows the current and future potential of adding value to agro-forestry waste biomass by means of thermochemical processes as biofuels and bioproducts to move towards a bioeconomy strategy