常温低基质厌氧氨氧化ASBR反应器的快速启动

采用低基质模拟废水〔NH_4~+-N、NO_2~--N分别为(25±0.4)、(33±0.6)mg/L〕,在温度为(23±0.5)℃的条件下,研究了厌氧氨氧化ASBR反应器的快速启动。第Ⅰ阶段HRT为24 h,pH不控制,菌体自溶期出水NH_4~+-N为69 mg/L,活性停滞期出水NH_4~+-N与进水几乎相等;第Ⅱ~Ⅲ阶段,菌体处于活性提高期,HRT分别为12、8 h,pH控制为8.0~8.2,出水NH_4~+-N降低到1.6 mg/L,NO_2~--N均先升高后降低;第Ⅳ阶段HRT为4 h,pH控制为8.0~8.2,出水NH_4~+-N和NO_2~--N均低于1 mg/L,TN去除负荷为352.3 mg/(L·d),△m(NH_4~+-N)∶△m(NO_2~--N)∶△m(NO_3~--N)=1∶(1.33±0.02)∶(0.26±0.02),反应器启动成功。

Quick start-up of low-substrate Anammox ASBR reactor at normal temperature

Using low substrate simulated wastewater(NH4+-N and NO2--N are(25±0.4)mg/L and(33±0.6)mg/L respectively),at temperature(23±0.5)℃,the rapid start?up of anaerobic ammonium oxidation(Anammox)process anaerobic sequencing batch reactor(ASBR)has been studied. In StageⅠ,HRT is 24 h and pH uncontrolled,in thalli autolysis phase effluent NH4+-N is 69 mg/L,in activity stagnate phase the effluent and influent NH4+-N are almost the same. In StageⅡ-Ⅲ,the thalli is in up?going period,their HRT are 12 h and 8 h,respectively,and pH is controlled at 8.0-8.2,the effluent NH4+-N decreases to 1.6 mg/L,while NO2--N increases first,then decreases. In StageⅣ,HRT is 4 h,and pH controlled at 8.0-8.2,the effluent NH4+-N and NO2--N both are lower than 1 mg/L, and the TN removing load is 352.3 mg/(L·d),△m(NH4+-N)∶△m(NO2--N)∶△m(NO3--N)=1∶(1.33 ± 0.02)∶(0.26±0.02),indicating that the Anammox ASBR reactor is successfully started up.