title: Recovery of carboxylic acids produced during dark fermentation of food waste by adsorption on Amberlite IRA-67 and activated carbon.
abstract: Amberlite IRA-67 and activated carbon were tested as promising candidates for carboxylic acid recovery by adsorption. Dark fermentation was performed without pH control and without addition of external inoculum at 37°C in batch mode. Lactic, acetic and butyric acids, were obtained, after 7days of fermentation. The maximum acid removal, 74%, from the Amberlite IRA-67 and 63% from activated carbon was obtained from clarified fermentation broth using 200gadsorbent/Lbroth at pH 3.3. The pH has significant effect and pH below the carboxylic acids pKa showed to be beneficial for both the adsorbents. The un-controlled pH fermentation creates acidic environment, aiding in adsorption by eliminating use of chemicals for efficient removal. This study proposes simple and easy valorization of waste to valuable chemicals.
authors.affiliation: Institute Center for Energy (iEnergy), Masdar Institute of Science and Technology, P.O. Box 54224, Abu Dhabi, United Arab Emirates.
authors.forename: Ahasa
authors.initials: A
authors.lastname: Yousuf
authors.affiliation: Institute Center for Energy (iEnergy), Masdar Institute of Science and Technology, P.O. Box 54224, Abu Dhabi, United Arab Emirates.
authors.forename: Fabian
authors.initials: F
authors.lastname: Bonk
authors.affiliation: Institute Center for Energy (iEnergy), Masdar Institute of Science and Technology, P.O. Box 54224, Abu Dhabi, United Arab Emirates.
authors.forename: Juan-Rodrigo
authors.initials: JR
authors.lastname: Bastidas-Oyanedel
authors.affiliation: Institute Center for Energy (iEnergy), Masdar Institute of Science and Technology, P.O. Box 54224, Abu Dhabi, United Arab Emirates. Electronic address: jschmidt@masdar.ac.ae.
authors.forename: Jens Ejbye
authors.initials: JE
authors.lastname: Schmidt
mesh_terms: D000327:Adsorption; D002264:Carboxylic Acids / Q000302:isolation & purification*; D002606:Charcoal / Q000737:chemistry*; D003624:Darkness; D005285:Fermentation; D005502:Food; D006863:Hydrogen-Ion Concentration; D012117:Resins, Synthetic / Q000737:chemistry*; D013696:Temperature; D014866:Waste Products
chemical_list: D002264:Carboxylic Acids; D012117:Resins, Synthetic; D014866:Waste Products; D002606:Charcoal; C046797:amberlite
keywords: Adsorption; Carboxylic acids; Dark fermentation; Food waste; Platform chemicals