摘要
以人工配制高氨氮低碳氮比(C/N)废水为进水,采用膜生物工艺,通过控制亚硝化池内温度为28~30℃,溶解氧浓度为0.5 mg/L,水力停留时间为12 h,pH为7.8~8.0,进水氨氮浓度为200 mg/L、CODCr为40 mg/L,在亚硝化池中成功实现了C/N为1∶5条件下废水的亚硝化。经过14 d的运行时间,污泥龄控制在100 d,在膜生物反应器(MBR反应器)中得到了稳定的亚硝酸盐氮积累。将氨氮浓度分别提高至400和800 mg/L的情况下,其亚硝化菌的耐受浓度负荷冲击能力均较强。
Taking synthetic wastewater of the high ammonia nitrogen and low CN ratio as the influent,the membrane bio-reactor( MBR) was used to study establishment of stable nitritation process. The main parameters of the reactor were controlled as follows: the temperature of nitritation tanks was 28-30 ℃,dissolved oxygen( DO)was 0. 5 mg/L,HRT was 12 h,pH was 7. 8-8. 0,influent ammonia concentration was 200 mg/L,CODCrwas 40mg/L. Under these conditions,the nitritation of wastewater with C/N of 1∶5 was realized in the nitritation tanks.After 14 days,sludge age was 100 days,a stable nitrite nitrogen accumulation was achieved. When the ammonia concentration was increased to 400 and 800 mg/L,respectively,the tolerance of nitrosobacteria against shock of high ammonia load was relatively high.
出处
《环境工程技术学报》
CAS
2014年第6期451-455,共5页
Journal of Environmental Engineering Technology
基金
国家水体污染控制与治理科技重大专项(2012ZX07202-005
2013ZX07202-010)
关键词
低碳氮比
高氨氮废水
亚硝化
亚硝酸盐氮积累
low C/N ratio
high ammonia wastewater
nitritation
nitrite nitrogen accumulation