title: Start-up of a combined anaerobic/partial nitritation/anammox process for high-salt mustard wastewater treatment.
abstract: To treat high salinity wastewater from the mustard pickling industry, a combined anaerobic, partial nitritation (PN), and anammox process was employed using three connected reactors: an anaerobic sequencing batch biofilm reactor (ASBBR) for anaerobic treatment, a sequencing batch reactor (SBR) for PN, and an upflow anaerobic sludge blanket (UASB) for anammox. The start-up of the three individual reactors was investigated. Results showed that each reactor started up successfully, notwithstanding the stepwise increase of influent salinity to about 16.1 g NaCl/L. In the ASBBR, 89.7 % of chemical oxygen demand in the influent was removed and organic nitrogen was converted to ammonium (NH4 (+)-N). The SBR performed well with NO3 (-)-N concentration of 4.9 mg/L and ratio of NO2 (-)-N to NH4 (+)-N at the range of 1.0 to 1.3 in the effluent, which favored the anammox process. After the start-up of the UASB, the anammox process also showed stability and efficiency with a high total nitrogen removal efficiency of 86.2 % under high salinity of 12.0 g NaCl/L and nitrogen loading rate of 258 mg/(L · day).
authors.affiliation: Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing, 400045, China.
authors.forename: You-Peng
authors.initials: YP
authors.lastname: Chen
authors.forename: Teng-Fei
authors.initials: TF
authors.lastname: Ma
authors.forename: Xiao
authors.initials: X
authors.lastname: Hu
authors.forename: Fang
authors.initials: F
authors.lastname: Fang
authors.forename: Yu
authors.initials: Y
authors.lastname: Shen
authors.forename: Ji-Xiang
authors.initials: JX
authors.lastname: Yang
authors.forename: Jin-Song
authors.initials: JS
authors.lastname: Guo
authors.forename: Zhen-Guo
authors.initials: ZG
authors.lastname: Bao
authors.forename: Peng
authors.initials: P
authors.lastname: Yan
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors; D006801:Humans; D006838:Hydrocarbons / Q000737:chemistry; D009149:Mustard Plant / Q000633:toxicity; D009584:Nitrogen / Q000737:chemistry; D012965:Sodium Chloride / Q000737:chemistry; D062065:Wastewater; D014874:Water Pollutants, Chemical; D018508:Water Purification
chemical_list: D006838:Hydrocarbons; D009584:Nitrogen; D012965:Sodium Chloride; D062065:Wastewater; D014874:Water Pollutants, Chemical