Sergi Astals
YOU?
Author Swipe
View article: Thermophilic anaerobic biodegradation of commercial polylactic acid products
Thermophilic anaerobic biodegradation of commercial polylactic acid products Open
This study examines the anaerobic biodegradability of six commercial polylactic acid (PLA) products under thermophilic conditions. All products showed similar methane yields of 507 ± 24 L CH4 kg-1 VS, with an estimated biodegradability of …
View article: Consistent acidogenic co-fermentation of waste activated sludge and food waste under thermophilic conditions
Consistent acidogenic co-fermentation of waste activated sludge and food waste under thermophilic conditions Open
Acidogenic co-fermentation of waste activated sludge (WAS) and food waste (FW) under thermophilic conditions enhances process consistency, while overcoming the problem of acetic acid consumption due to growing methanogens. Two long-term co…
View article: Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production
Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production Open
Two perturbations were investigated in acidogenic co-fermentation of waste activated sludge (WAS) and food waste in continuous mesophilic fermenters: increasing the organic loading rate (OLR) and changing the WAS. A control reactor maintai…
View article: Kinetic study of magnesium dissolution using a magnesium oxide industrial by-product
Kinetic study of magnesium dissolution using a magnesium oxide industrial by-product Open
Phosphorus recovery via struvite precipitation in wastewater treatment plants (WWTPs) is a key technology for nutrient recovery. This work investigates the dissolution kinetics of an industrial low-grade magnesium oxide (LG-MgO) by-product…
View article: Process performance and precipitate quality of phosphorus recovery by struvite precipitation in a fluidized bed reactor using a MgO industrial by-product
Process performance and precipitate quality of phosphorus recovery by struvite precipitation in a fluidized bed reactor using a MgO industrial by-product Open
Phosphorus recovery through struvite precipitation has gained interest due to the potential use of struvite as a fertiliser, with fluidised bed reactors being a popular technology for carrying out the process. Struvite precipitation requir…
View article: Acidogenic fermentation of biowaste coupled with nitrogen recovery using selective membranes to produce a VFA-rich liquid with a high C/N ratio
Acidogenic fermentation of biowaste coupled with nitrogen recovery using selective membranes to produce a VFA-rich liquid with a high C/N ratio Open
This research focuses on the production of a liquid stream rich in volatile fatty acids (VFAs) and low ammoniacal nitrogen content (<0.1 g N/L) from biowaste. The liquid stream was obtained by combining (i) mixed culture acidogenic ferment…
View article: Temperature-driven carboxylic acid production from waste activated sludge and food waste: Co-fermentation performance and microbial dynamics
Temperature-driven carboxylic acid production from waste activated sludge and food waste: Co-fermentation performance and microbial dynamics Open
This work aims to improve the continuous co-fermentation of waste activated sludge (WAS) and food waste (FW) by investigating the long-term impact of temperature on fermentation performance and the underpinning microbial community. Acidoge…
View article: Ammoniacal nitrogen recovery from swine slurry using a gas-permeable membrane: pH control strategies and feed-to-trapping volume ratio
Ammoniacal nitrogen recovery from swine slurry using a gas-permeable membrane: pH control strategies and feed-to-trapping volume ratio Open
Gas-permeable membrane (GPM) technology is gaining interest to recover nitrogen from residual effluents due to its effectiveness, simple operation and capacity of producing a nutrient rich product with fertilising value. In this study, a G…
View article: Stabilization of metal and metalloids from contaminated soils using magnesia-based tundish deskulling waste from continuous steel casting
Stabilization of metal and metalloids from contaminated soils using magnesia-based tundish deskulling waste from continuous steel casting Open
This study presents a groundbreaking exploration into the potential use of refractory tundish deskulling waste (TUN), a magnesium oxide-based by-product from continuous steel casting, as a stabilizing agent for remediating metal and metall…
View article: Ammoniacal nitrogen recovery from pig slurry using a novel hydrophobic/hydrophilic selective membrane
Ammoniacal nitrogen recovery from pig slurry using a novel hydrophobic/hydrophilic selective membrane Open
The implementation of the circular economy paradigm in intensive pig farming requires technologies able to recover ammoniacal nitrogen from pig slurries. This research explores the feasibility of a novel hydrophobic/hydrophilic non-porous …
View article: Impact of food waste composition on acidogenic co-fermentation with waste activated sludge
Impact of food waste composition on acidogenic co-fermentation with waste activated sludge Open
The impact of food waste (FW) composition on co-fermentation performance was studied to elucidate if adjusting FW composition can be used to drive the fermentation yield and profile, which is relevant for biorefinery applications. First, t…
View article: Ammonia recovery from acidogenic fermentation effluents using a gas-permeable membrane contactor
Ammonia recovery from acidogenic fermentation effluents using a gas-permeable membrane contactor Open
A gas-permeable membrane (GPM) contactor was used to recover ammoniacal nitrogen from a synthetic and a biowaste fermentation broth under different pH (from 6 to 11) and temperatures (35 and 55 °C). Ammonia mass transfer constant (Km) incr…
View article: Impact of permeate flux and gas sparging rate on membrane performance and process economics of granular anaerobic membrane bioreactors
Impact of permeate flux and gas sparging rate on membrane performance and process economics of granular anaerobic membrane bioreactors Open
This research investigated the impact of permeate flux and gas sparging rate on membrane permeability, dissolved and colloidal organic matter (DCOM) rejection and process economics of granular anaerobic membrane bioreactors (AnMBRs). The g…
View article: Potential of anaerobic co-fermentation in wastewater treatments plants: A review
Potential of anaerobic co-fermentation in wastewater treatments plants: A review Open
Fermentation (not anaerobic digestion) is an emerging biotechnology to transform waste into easily assimilable organic compounds such as volatile fatty acids, lactic acid and alcohols. Co-fermentation, the simultaneous fermentation of two …
View article: Considering syntrophic acetate oxidation and ionic strength improves the performance of models for food waste anaerobic digestion
Considering syntrophic acetate oxidation and ionic strength improves the performance of models for food waste anaerobic digestion Open
Current mechanistic anaerobic digestion (AD) models cannot accurately represent the underlying processes occurring during food waste (FW) AD. This work presents an update of the Anaerobic Digestion Model no. 1 (ADM1) to provide accurate es…
View article: Co-digestion of sewage sludge and food waste in a wastewater treatment plant based on mainstream anaerobic membrane bioreactor technology: A techno-economic evaluation
Co-digestion of sewage sludge and food waste in a wastewater treatment plant based on mainstream anaerobic membrane bioreactor technology: A techno-economic evaluation Open
The implementation of anaerobic membrane bioreactor as mainstream technology would reduce the load of sidestream anaerobic digesters. This research evaluated the techno-economic implications of co-digesting sewage sludge and food waste in …