title: Identification of recalcitrant compounds in a pilot-scale AB system: An adsorption (A) stage followed by a biological (B) stage to treat municipal wastewater.
abstract: This manuscript presents a comparison of the A-stage and B-stage sludges in terms of anaerobic biodegradability and low molecular weight compounds present in the supernatant using Gas Chromatography-Mass Spectrometry (GC-MS). The GC-MS analysis of A-stage and B-stage supernatants identified respectively 43 and 19 organic compounds consisting mainly of aromatics (27.9% and 21%), alcohols (25.6% and 15%) and acids (30.2% and 15%). The methane potential was found to be 349±1 mL CH4/g VS and 238±12 mL CH4/g VS, respectively. After anaerobic digestion of these sludges, a greater proportion of aromatics (42% and 58%) and a lower proportion of acids (10% and 10%) and alcohols (16% and 10%) was observed.
authors: Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One #06-08, Singapore 637141, Singapore.
authors: Antoine Prandota
authors: AP
authors: Trzcinski
authors: Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One #06-08, Singapore 637141, Singapore.
authors: Lily
authors: L
authors: Ganda
authors: Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One #06-08, Singapore 637141, Singapore.
authors: Annie Soh
authors: AS
authors: Yan Ni
authors: Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One #06-08, Singapore 637141, Singapore.
authors: Chinagarn
authors: C
authors: Kunacheva
authors: Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One #06-08, Singapore 637141, Singapore.
authors: Zhang Dong
authors: ZD
authors: Qing
authors: Public Utilities Board, Water Reclamation (Plants) Department, 40 Scotts Road, #15-01, Singapore 228231, Singapore.
authors: Li Leonard
authors: LL
authors: Lin
authors: Public Utilities Board, Water Reclamation (Plants) Department, 40 Scotts Road, #15-01, Singapore 228231, Singapore.
authors: Guihe
authors: G
authors: Tao
authors: Public Utilities Board, Water Reclamation (Plants) Department, 40 Scotts Road, #15-01, Singapore 228231, Singapore.
authors: Yingjie
authors: Y
authors: Lee
authors: Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One #06-08, Singapore 637141, Singapore; Division of Environmental and Water Resources, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore. Electronic address: WJNg@ntu.edu.sg.
authors: Wun Jern
authors: WJ
authors: Ng
mesh_terms: D000327:Adsorption; D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D004867:Equipment Design; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D008697:Methane / Q000378:metabolism*; D008970:Molecular Weight; D009930:Organic Chemicals / Q000032:analysis* / Q000378:metabolism; D010865:Pilot Projects; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D062065:Wastewater / Q000032:analysis / Q000737:chemistry
chemical_list: D008697:Methane; D009930:Organic Chemicals; D012722:Sewage; D062065:Wastewater
keywords: AB process; Anaerobic biodegradability; Dissolved organic compounds; Sewage sludge; Soluble microbial products (SMP)