title: Effect of powdered activated carbon technology on short-cut nitrogen removal for coal gasification wastewater.
abstract: A combined process consisting of a powdered activated carbon technology (PACT) and short-cut biological nitrogen removal reactor (SBNR) was developed to enhance the removal efficiency of the total nitrogen (TN) from the effluent of an upflow anaerobic sludge bed (UASB) reactor, which was used to treat coal gasification wastewater (CGW). The SBNR performance was improved with the increasing of COD and TP removal efficiency via PACT. The average removal efficiencies of COD and TP in PACT were respectively 85.80% and 90.30%. Meanwhile, the NH3-N to NO2-N conversion rate was achieved 86.89% in SBNR and the total nitrogen (TN) removal efficiency was 75.54%. In contrast, the AOB in SBNR was significantly inhibited without PACT or with poor performance of PACT in advance, which rendered the removal of TN. Furthermore, PAC was demonstrated to remove some refractory compounds, which therefore improved the biodegradability of the coal gasification wastewater.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Zhao
authors.forename: Hongjun
authors.initials: H
authors.lastname: Han
authors.forename: Chunyan
authors.initials: C
authors.lastname: Xu
authors.forename: Haifeng
authors.initials: H
authors.lastname: Zhuang
authors.forename: Fang
authors.initials: F
authors.lastname: Fang
authors.forename: Linghan
authors.initials: L
authors.lastname: Zhang
mesh_terms: D002244:Carbon / Q000737:chemistry*; D003031:Coal; D005740:Gases / Q000737:chemistry*; D009584:Nitrogen / Q000302:isolation & purification*; D062065:Wastewater
chemical_list: D002244:Carbon; D003031:Coal; D005740:Gases; D009584:Nitrogen; D062065:Wastewater
keywords: Biodegradability; Chromaticity; Coal gasification wastewater; Powdered activated carbon; Short-cut nitrogen removal