title: Treatment of aqueous phase of bio-oil by granular activated carbon and evaluation of biogas production.
abstract: Hydrothermal liquefaction of wet biomass such as algae is a promising thermochemical process for the production of bio-oil. Bio-oil aqueous phase generated during liquefaction process is rich in complex organics and can be utilized for biogas production following its pre-treatment with granular activated carbon. In our study, use of 30% activated carbon resulted in higher chemical oxygen demand (COD) reduction (53±0.3%) from aqueous phase. Higher CH4production (84±12mL/gCOD) was also observed in 30% carbon-treated aqueous phase fed cultures, whereas only 32±6mLCH4/gCOD was observed in control (non-carbon treated) cultures. The results from this study indicate that almost 67±0.3% initial COD of aqueous phase can be reduced using a combination of both carbon treatment and biogas production. This study shows that aqueous phase can be utilized for CH4production.
authors: Department of Biosystems Engineering, Auburn University, Auburn, AL 36849 USA.
authors: Saravanan R
authors: SR
authors: Shanmugam
authors: Department of Biosystems Engineering, Auburn University, Auburn, AL 36849 USA. Electronic address: sushil.adhikari@auburn.edu.
authors: Sushil
authors: S
authors: Adhikari
authors: Department of Biosystems Engineering, Auburn University, Auburn, AL 36849 USA.
authors: Zhouhang
authors: Z
authors: Wang
authors: Department of Biosystems Engineering, Auburn University, Auburn, AL 36849 USA.
authors: Rajdeep
authors: R
authors: Shakya
mesh_terms: D001419:Bacteria / Q000378:metabolism; D056804:Biofuels / Q000032:analysis; D057919:Biological Oxygen Demand Analysis; D018533:Biomass; D002244:Carbon; D014867:Water; D018508:Water Purification / Q000379:methods
chemical_list: D056804:Biofuels; D014867:Water; D002244:Carbon
keywords: Activated carbon treatment; Algae; Bio-oil aqueous phase; Hydrothermal liquefaction; Methane production