采用序批式生物膜反应器(SBBR)同步硝化反硝化(SND)技术处理南方地区微污染水源水,通过控制温度在28~31℃、低DO浓度和较高pH值实现了SND,重点考察了DO浓度和pH值对系统脱氮效果的影响。结果表明,当DO浓度为0.3~1.1 mg/L时,对NH_4~+-N和TN的去除效果较好,平均去除率分别为91.9%和85.3%;当pH值为8.0±0.1时,系统的脱氮效果最好,对NH_4~+-N和TN的平均去除率分别可达93.9%和92.3%。在最佳工况条件下,出水氨氮和TN浓度均可达到《地表水环境质量标准》(GB 3838—2002)的Ⅲ类水质要求。 SND was applied to treat micro-polluted source water in the south of China by sequencing-batch biofilm reactor (SBBR), and the SND was achieved by controlling the temperature at 28 ~ 31 ℃, low DO concentration and high pH value. Effect of DO concentration and pH on denitrification efficiency of the system. The results showed that the removal efficiencies of NH_4 ~ + -N and TN were good at the DO concentration of 0.3 ~ 1.1 mg / L with the average removal rates of 91.9% and 85.3%, respectively. When the pH value was 8.0 ± 0.1, the system The best removal efficiency of NH_4 ~ + -N and TN was 93.9% and 92.3% respectively. Under the optimum working conditions, the effluent ammonia nitrogen and TN concentrations all meet the Grade III water quality requirements of Surface Water Environmental Quality Standard (GB 3838-2002).