SAD工艺在厌氧氨氧化不同运行阶段的启动

摘要

In order to start up astable simultaneous anammox and heterotrophic denitrification process to treat domestic sewage, the experiment was carried out at different ammonia nitrogen removal of the load (ANR). During the operation period, the variation of ammonia nitrogen (4NH+―N)nitrite nitrogen (2NO?―N) and nitrate nitrogen (3NO?―N) and dynamics activities of functional microbes were investigated to elaboratemain factors for the SAD process. The results showed that the reactor could treat domestic wastewater containing 100~150mg/L COD when the ANR was during 0.27~0.40kg/(m3·d) and it could treat domestic wastewater containing 100~200mg/L COD stably when the ANR was 0.85kg/(m3·d) The reactor could start up stable SAD process if the ratioof ananmmox bacteria dynamics activity ( μ NH4+-N)with heterotrophicbacteria (μCOD)and denitrificationbacteria ( μNO3-- N) was within reasonable limits.The anammox bacteria activity was increased ,meanwhile the heterotrophicbacteria and denitrificationbacteriaactivity were decreased when the hydraulic retention time (HRT) was reduced. According to the cycle experiments,the simultaneous anammox and partial denitrification process%利用SBR反应器在厌氧氨氧化启动过程中脱氮性能达到不同氨氮去除负荷(ANR)时启动厌氧氨氧化耦合反硝化(SAD)工艺处理生活污水.分析对反应器内3氮变化和功能菌活性变化.结果表明,在厌氧氨氧化的ANR达到0.27~0.40kg/(m3·d)时,启动SAD工艺,反应器可处理COD为100mg/L以下的生活污水;在厌氧氨氧化的氨氮去除去除负荷(ANR)达到0.65~0.85kg/(m3·d)时,反应器可高效处理COD为100~200mg/L的生活污水,而在ANR达到0.85kg/(m3·d)时,反应器SAD工艺可稳定处理COD为100~200mg/L的生活污水,反应器内ANAMMOX菌的活性与异养菌活性及反硝化菌活性保持在合理范围内即可稳定启动SAD工艺,缩短SBR反应器的周期,可加速反应器ANAMMOX菌活性的提高,降低异养菌和反硝化菌活性的提高.周期测试分析,表明,控制C/N比和HRT可实现厌氧氨氧化耦合部分反硝化脱氮.