摘要
采用电极-SBBR法处理沼液,在优选工况条件下,探讨了极电压,DO,填料密度等工艺参数对脱氮效果的影响。结果表明,在电极-SBBR反应器内,工况为瞬时进水→厌氧（1.0 h）→曝气（4.0 h,通电）→沉淀（2.0 h,通电）→瞬时出水,极电压为15 V,控制DO在4～5 mg·L^-1范围内,填料密度为30%时,沼液能够取得良好的脱氮效果,NH＋4-N,TN去除率分别达到94.44%,88.06%。整个系统能够为发生同步硝化反硝化创造条件,极大地提高了脱氮效率。
With the optimized working condition, the effect of electrodes voltage, dissolved oxygen（DO） and packing den- sity in digester on the removal of nitrogen from biogas slurry were investigated adopting electrode-sequencing batch biofilm reactor （electrode-SBBR）. The result showed that it could obtain a satisfied nitrogen removal under the condition of instant inflow＋anaerobic for 1h→ aeration ＆ galvanization for 4h→ sedimentation ＆ galvanization for 2h→instant outflow, and condition of electrodes voltage of 15V, DO of 4 ～5 mg ·L^-1, packing density of 30%. The NH4^＋-N, TN removal reached 94.44% and 88.06% respectively. Favorable circumstances for simultaneous nitrification ＆ denitrification were provided in the Electrode-SBBR system by above conditioning, and the nitrogen removal vastly enhanced.
出处
《中国沼气》
北大核心
2015年第2期36-41,共6页
China Biogas
基金
"十一五"国家科技支撑计划项目(2010BAD03B03)
西南大学资源环境学院大学生科技创新"光炯"培育项目(20130104)
关键词
电极-SBBR
沼液
极电压
DO
料密度
electrocle-SBBR
biogas slurry
voltage between electrodes
dissolved oxygen
packing density
