title: Determination of biological removal of recalcitrant organic contaminants in coal gasification waste water.
abstract: Coal gasification waste water treatment needed a sustainable and affordable plan to eliminate the organic contaminants in order to lower the potential environmental and human health risk. In this paper, a laboratory-scale anaerobic-aerobic intermittent system carried out 66 operational cycles together for the treatment of coal gasification waste water and the removal capacity of each organic pollutant. Contaminants included phenols, carboxylic acids, long-chain hydrocarbons, and heterocyclic compounds, wherein the relative content of phenol is up to 57.86%. The long-term removal of 77 organic contaminants was evaluated at different hydraulic retention time (anaerobic24 h + aerobic48 h and anaerobic48 h +aerobic48 h). Contaminant removal ranged from no measurable removal to near-complete removal with effluent concentrations below the detection limit. Contaminant removals followed one of four trends: steady-state removal throughout, increasing removal to steady state (acclimation), decreasing removal, and no removal. Organic degradation and transformation in the reaction were analysed by gas chromatography/mass spectrometry technology.
authors.affiliation: a School of Environmental Science and Engineering , Shanghai Jiao Tong University , Shanghai 200240 , People's Republic of China.
authors.forename: Qinhong
authors.initials: Q
authors.lastname: Ji
authors.affiliation: a School of Environmental Science and Engineering , Shanghai Jiao Tong University , Shanghai 200240 , People's Republic of China.
authors.forename: Salma
authors.initials: S
authors.lastname: Tabassum
authors.affiliation: b New Energy Research Center, China National Offshore Oil Corporation Research Institute , Beijing 100028 , People's Republic of China.
authors.forename: Guangxin
authors.initials: G
authors.lastname: Yu
authors.affiliation: a School of Environmental Science and Engineering , Shanghai Jiao Tong University , Shanghai 200240 , People's Republic of China.
authors.forename: Chunfeng
authors.initials: C
authors.lastname: Chu
authors.affiliation: a School of Environmental Science and Engineering , Shanghai Jiao Tong University , Shanghai 200240 , People's Republic of China.
authors.forename: Zhenjia
authors.initials: Z
authors.lastname: Zhang
mesh_terms: D003031:Coal; D008401:Gas Chromatography-Mass Spectrometry; D057230:Limit of Detection; D010636:Phenols / Q000032:analysis* / Q000302:isolation & purification*; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D003031:Coal; D010636:Phenols; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: GC/MS; coal gasification waste water; intermittent; organic contaminants; phenolic compounds