亚硝酸盐型同步厌氧生物脱氮除硫工艺的运行性能

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13.4kg/(m3·d)和2.3kg/(m3·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132.3mg/L,最适水力停留时间为4h。硫化物和亚硝酸盐的表观半抑制浓度分别为403.9mg/L和120.8mg/L,两者之间的联合毒性为拮抗作用。

Simultaneous removal of sulfide and nitrite by anaerobic bioprocess

We studied simultaneous removal of sulfide and nitrite by an anaerobic process in an upflow anaerobic sludge blanket (UASB) reactor. The process could remove sulfide and nitrite 13.4 kg/(m3·d) and 2.3 kg/(m3·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 influent substrate concentrations. The combined effect between sulfide and nitrite was antagonistic effect.