title: Hydrolytic and acidogenic fermentation potential of food waste with source segregated feces-without-urine as co-substrate.
abstract: This study explored a new approach to enhance VFA productivity from anaerobic co-digestion of food-waste (FW) with source-segregated brown-water (BW) [feces-without-urine]. Effort was made to separate urine and BW from the source (using no-mix-toilet) mainly to expedite further treatment and resource-recovery. Effect of alkaline-pH [B] and acclimatized acidogenic inoculum [C] on acidification efficiency was investigated and compared with raw FW+BW co-digestion [A]. Batch-assay results indicated that VFA productivity persists for 144-h with about 615%, 522% and 376% increase in VFA-COD, respectively for 3-conditions [A-C]; which accounted for 70%, 49% and 58% of CODs input, respectively. High butyric-acid was observed in [A] and [C], followed by acetic, propionic-acids; whereas, abundant acetic-acid (86% of TVFA) was observed in [B], which are the most favorable-forms for methane production or other value-added-products. For 144-h of acidification, this study validated the feasibility of maximizing VFA-yield by 7-12 times compared to FW or BW as a sole-substrate.
authors.affiliation: Residues and Resource Reclamation Centre, NEWRI, Nanyang Technological University, #06-08 CleanTech One, 1 Cleantech Loop, 637141, Singapore. Electronic address: rrajinime@yahoo.co.in.
authors.forename: Rajinikanth
authors.initials: R
authors.lastname: Rajagopal
authors.affiliation: Residues and Resource Reclamation Centre, NEWRI, Nanyang Technological University, #06-08 CleanTech One, 1 Cleantech Loop, 637141, Singapore.
authors.forename: Ashiq
authors.initials: A
authors.lastname: Ahamed
authors.affiliation: Residues and Resource Reclamation Centre, NEWRI, Nanyang Technological University, #06-08 CleanTech One, 1 Cleantech Loop, 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore. Electronic address: jywang@ntu.edu.sg.
authors.forename: Jing-Yuan
authors.initials: JY
authors.lastname: Wang
mesh_terms: D000143:Acids / Q000378:metabolism*; D057919:Biological Oxygen Demand Analysis; D005232:Fatty Acids, Volatile / Q000032:analysis; D005243:Feces / Q000737:chemistry*; D005285:Fermentation; D005502:Food; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D014556:Urine / Q000737:chemistry*; D014866:Waste Products
chemical_list: D000143:Acids; D005232:Fatty Acids, Volatile; D014866:Waste Products
keywords: Acidogenic potential; Brown-water; Food-waste; Hydrolysis; Volatile fatty acids