亚硝酸盐型同步厌氧生物脱氮除硫工艺的运行性能

摘要

采用上流式厌氧污泥床(UASB)反应器研究了亚硝酸盐型同步厌氧生物脱氮除硫工艺的性能.该工艺具有很高的硫化物和亚硝酸盐转化潜能,最大容积硫化物去除率和容积硝酸盐去除率分别为13.4 kg/(m~3·d)和2.3 kg/(m~3·d);所能耐受的最大进水硫化物和亚硝酸盐浓度分别为880mg/L和252.7mg/L;最适进水硫化物和亚硝酸盐浓度分别为460mg/L和 132.3 mg/L,最适水力停留时间为4 h.硫化物和亚硝酸盐的表观半抑制浓度分别为403.9 mg/L和120.8 mg/L,两者之间的联合毒性为拮抗作用.%We studied simultaneous removal of sulfide and nitrite by an anaerobic process in an upflow anaerobic sludge blanket (UASB) reactor.The process could removesulfide and nitrite 13.4kg/(m~3·d) and 2.3kg/(m~3·d),respectively,of the reactor tolerated high influent substrate concentration (880.0 mg S/L and 252.7 mg N/L) with the optimum substrate concentration (460.0 mg S/L and 132.3 mg N/L).It tolerated short hydraulic retention time (HRT) with the optimum HRT of 4 h.The apparent half inhibition concentrations of sulfide and nitrite were 403.9 mg S/L and 120.8 mg N/L, respectively, under different infiuent substrate concentrations.The combined effect between sulfide and nitrite was antagonistic effect.