游离氨对硝化菌活性的短期抑制影响试验研究
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摘要
采用SBR反应器,在不同游离氨(FA)浓度梯度结合限时曝气条件下,考察了FA对全程硝化活性污泥(CNAS)和短程硝化活性污泥(PNAS)的抑制特性。结果表明,当FA浓度介于2.5~197.2 mg/L时,CNAS和PNAS系统内均可发生较好的硝化作用,氨氧化速率(AOR)均维持在较高水平,表明氨氧化菌(AOB)活性未受到抑制。但对于CNAS系统,当FA浓度达到137.6~168.4 mg/L时,亚硝酸盐氧化菌(NOB)活性受到完全抑制。此外,CNAS和PNAS的比氨氧化速率(SAOR)与FA浓度之间总体上呈现出指数增长关系,仅在反应的初始阶段,CNAS的SAOR表现出略微降低的适应过程。相对于CNAS,PNAS具有更强的抵抗FA抑制的能力。
The inhibitory properties of free ammonia( FA) at different concentration gradients combined with the limit of aeration on complete nitrification activated sludge( CNAS) and partial nitrification activated sludge( PNAS) were investigated in SBR. The results showed that when the FA concentrations ranged from 2. 5 to 197. 2 mg / L,nitrification occurred both in CNAS and PNAS systems,and ammonia oxidation rates( AOR) were maintained at a high level,indicating that the activity of ammoniaoxidizing bacteria( AOB) was not inhibited. When the FA concentrations were 137. 6 to 168. 4 mg / L in the CNAS system,the activity of nitrite-oxidizing bacteria( NOB) was completely inhibited. In addition,there was an exponential relationship between the FA concentration and the specific ammonia oxidation rates( SAOR) of the CNAS and the PNAS. Only at the initial stage of the reaction,SAOR of the CNAS showed a slight decrease in the adaptation phase. Compared with the CNAS,the PNAS had stronger ability to resist the FA inhibition.
The inhibitory properties of free ammonia( FA) at different concentration gradients combined with the limit of aeration on complete nitrification activated sludge( CNAS) and partial nitrification activated sludge( PNAS) were investigated in SBR. The results showed that when the FA concentrations ranged from 2. 5 to 197. 2 mg / L,nitrification occurred both in CNAS and PNAS systems,and ammonia oxidation rates( AOR) were maintained at a high level,indicating that the activity of ammoniaoxidizing bacteria( AOB) was not inhibited. When the FA concentrations were 137. 6 to 168. 4 mg / L in the CNAS system,the activity of nitrite-oxidizing bacteria( NOB) was completely inhibited. In addition,there was an exponential relationship between the FA concentration and the specific ammonia oxidation rates( SAOR) of the CNAS and the PNAS. Only at the initial stage of the reaction,SAOR of the CNAS showed a slight decrease in the adaptation phase. Compared with the CNAS,the PNAS had stronger ability to resist the FA inhibition.
引文
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[13]Kim J H,Guo X J,Park H S.Comparison study of the effects of temperature and free ammonia concentration on nitrification and nitrite accumulation[J].Process Biochem,2008,43(2):154-160.
[2]王莎,戴晓虎,曹达文,等.高氨氮废水的亚硝化调控因素研究[J].中国给水排水,2014,30(11):9-14.
[3]Beline F,Boursier H,Guiziou F,et al.Modelling of biological nitrogen removal during treatment of piggery wastewater[J].Water Sci Technol,2007,55(10):11-19.
[4]王元月,魏源送.新型控制模式下短程硝化/厌氧氨氧化法处理污泥水[J].中国给水排水,2013,29(15):24-27.
[5]韩晓宇,张树军,甘一萍,等.FA与FNA为控制因子的短程硝化启动与维持[J].环境科学,2009,30(3):809-814.
[6]Kim D J,Lee D I,Keller J.Effect of temperature and free ammonia on nitrification and nitrite accumulation in landfill leachate and analysis of its nitrifying bacterial community by FISH[J].Bioresour Technol,2006,97(3):459-468.
[7]Yamamoto T,Takaki K,Koyama T,et al.Novel partial nitritation treatment for anaerobic digestion liquor of swine wastewater using swim-bed technology[J].J Biosci Bioeng,2006,102(6):497-503.
[8]吴莉娜,彭永臻,王淑莹,等.游离氨对城市生活垃圾渗滤液短程硝化的影响[J].环境科学,2008,29(12):3428-3432.
[9]Park S W.Modeling kinetics of ammonium oxidation and nitrite oxidation under simultaneous inhibition by free ammonia and free nitrous acid[J].Process Biochem,2009,44(6):631-640.
[10]张亮,张树军,彭永臻.污水处理中游离氨对硝化作用抑制影响研究[J].哈尔滨工业大学学报,2012,44(2):75-79.
[11]Yuan Z G.Effect of free ammonia on the respiration and growth process of an enriched Nitrobacter culture[J].Water Res,2007,4(1):826-834.
[12]张树军,彭永臻,王淑莹,等.城市生活垃圾晚期渗滤液中氨氮的常温短程去除[J].化工学报,2007,58(4):1042-1047.
[13]Kim J H,Guo X J,Park H S.Comparison study of the effects of temperature and free ammonia concentration on nitrification and nitrite accumulation[J].Process Biochem,2008,43(2):154-160.