SNAD-MBBR处理垃圾渗滤液厌氧出水的脱氮研究
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摘要
利用移动床生物膜反应器(MBBR)对亚硝化-厌氧氨氧化-反硝化(SNAD)工艺处理垃圾渗滤液厌氧出水的脱氮效果进行了研究。SNAD-MBBR反应器内投加K3填料,控制温度为33～35℃、DO为0. 03～0. 1 mg/L、pH值为7. 5～8. 0、HRT为12 h,试验一共进行了152 d,在进水总氮负荷逐渐增加过程中相应调节曝气量以获得最佳去除效果。结果表明,在该工艺条件下进水总氮负荷为0. 9 kg/(m~3·d)时,TN去除率仍可达88%。当进水总氮负荷继续提高至1 kg/(m~3·d)时,由于进水中的有机物浓度较高以及多种异养好氧菌的繁殖,抑制了亚硝化及厌氧氨氧化过程,致使反应器脱氮效率明显降低,仅为20%左右。
Simultaneous partial nitrification,Anammox and denitrification (SNAD) process was operated to investigate its nitrogen removal performance in a moving bed biofilm reactor (MBBR). The influent of SNAD-MBBR process was anaerobic effluent of landfill leachate. The reactor was filled K3 carrier,and the temperature,DO,pH and HRT was controlled at 33-35 ℃,0. 03-0. 1 mg/L,7. 5-8. 0and 12 h respectively. The experiment lasted for 152 days,and the best removal effect was obtained by adjusting the aeration rate accordingly during the gradual increase of the influent total nitrogen load. Under the above conditions,when the total nitrogen load rate was 0. 9 kg/ (m~3·d),the TN removal rate could still reach 88%. When the influent total nitrogen load rate was increased to 1 kg/ (m~3·d),the TN removal rate was significantly reduced to only 20% due to the high concentration of organics in the influent and the inhibition of nitrite and anaerobic ammonia oxidation processes by the reproduction of heterotrophic aerobic bacteria.
Simultaneous partial nitrification,Anammox and denitrification (SNAD) process was operated to investigate its nitrogen removal performance in a moving bed biofilm reactor (MBBR). The influent of SNAD-MBBR process was anaerobic effluent of landfill leachate. The reactor was filled K3 carrier,and the temperature,DO,pH and HRT was controlled at 33-35 ℃,0. 03-0. 1 mg/L,7. 5-8. 0and 12 h respectively. The experiment lasted for 152 days,and the best removal effect was obtained by adjusting the aeration rate accordingly during the gradual increase of the influent total nitrogen load. Under the above conditions,when the total nitrogen load rate was 0. 9 kg/ (m~3·d),the TN removal rate could still reach 88%. When the influent total nitrogen load rate was increased to 1 kg/ (m~3·d),the TN removal rate was significantly reduced to only 20% due to the high concentration of organics in the influent and the inhibition of nitrite and anaerobic ammonia oxidation processes by the reproduction of heterotrophic aerobic bacteria.
引文
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[2]Dapena M A,Campos J L,Mosquera C A,et al.Stability of the ANAMMOX process in a gas-lift reactor and a SBR[J].J Biotechnol,2004,110(3):159-170.
[3]Guo J,Peng Y,Yang Q,et al.Theoretical analysis and enhanced nitrogen removal performance of step-feed SBR[J].Water Sci Technol,2008,58(4):792-802.
[4]Wu L,Xu Y,Shi X,et al.Advanced treatment of landfill leachate by combined process of partial nitrification and anaerobic ammonium oxidation[J].Res Environ Sci,2016,29(4):587-593.
[5]Chen H H,Liu S T,Yang F L,et al.The development of simultaneous partial nitrification,ANAMMOX and denitrification(SNAD)process in a single reactor for nitrogen removal[J].Bioresour Technol,2009,100(4):1548-1554.
[6]王亚举,黄胜,杨慧敏,等.不同填充率对MBBR污水处理效果影响研究[J].广东化工,2017,44(8):149-150.Wang Yaju,Huang Sheng,Yang Huimin,et al.Study on the effect of different filling rate on MBBR wastewater treatment[J].Guangdong Chemical Industry,2017,44(8):149-150(in Chinese).
[7]Walter W G.Standard Methods for the Examination of Water and Wastewater[M].Washington:American Public Health Association,1998.
[8]唐崇俭.厌氧氨氧化工艺特性与控制技术的研究[D].杭州:浙江大学,2011.Tang Chongjian.Characteristics and Control Strategies of ANAMMOX Process[D].Hangzhou:Zhejiang University,2011(in Chinese).
[9]Ni S Q,Ni J Y,Hu D L,et al.Effect of organic matter on the performance of granular anammox process[J].Bioresour Technol,2012,110:701-705.
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