title: State of the art of biological processes for coal gasification wastewater treatment.
abstract: The treatment of coal gasification wastewater (CGW) poses a serious challenge on the sustainable development of the global coal industry. The CGW contains a broad spectrum of high-strength recalcitrant substances, including phenolic, monocyclic and polycyclic aromatic hydrocarbons, heterocyclic nitrogenous compounds and long chain aliphatic hydrocarbon. So far, biological treatment of CGW has been considered as an environment-friendly and cost-effective method compared to physiochemical approaches. Thus, this reviews aims to provide a comprehensive picture of state of the art of biological processes for treating CGW wastewater, while the possible biodegradation mechanisms of toxic and refractory organic substances were also elaborated together with microbial community involved. Discussion was further extended to advanced bioprocesses to tackle high-concentration ammonia and possible options towards in-plant zero liquid discharge.
authors.affiliation: School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore; Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, 637141, Singapore.
authors.forename: Qian
authors.initials: Q
authors.lastname: Zhao
authors.affiliation: School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore; Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, 637141, Singapore. Electronic address: cyliu@ntu.edu.sg.
authors.forename: Yu
authors.initials: Y
authors.lastname: Liu
mesh_terms: D000332:Aerobiosis; D000693:Anaerobiosis; D001419:Bacteria; D001673:Biodegradation, Environmental; D003031:Coal; D010636:Phenols; D062065:Wastewater; D018508:Water Purification
chemical_list: D003031:Coal; D010636:Phenols; D062065:Wastewater
keywords: Biological treatment; Coal gasification wastewater; Phenol; Refractory compounds; Zero liquid discharge