高、低DO浓度下SBR亚硝化启动对比研究

Comparative Study of SBR Nitrosation Initiation at High and Low DO

本文采用序批式反应器(SBR)进行对比研究,结果发现,1#反应器(高DO,1.5~1.8 mg/L)比2#反应器(低DO,0.3~0.5 mg/L)更快实现了亚硝化的初步启动。1#、2#平均污泥指数(SVI)分别为28.5 mL/g、35.0 mL/g。启动后,1#、2#的平均氨氮容积负荷分别为0.83 kgN/(m^3·d)、0.87 kgN/(m^3·d),而平均氨氮污泥负荷分别为0.75 kgN/(kgMLSS·d)、0.37 kgN/(kgMLSS·d),1#反应器污泥有更强的污泥活性。

In this paper,a sequential batch reactor(SBR)was used for comparative research,the results showed that the 1#reactor(high DO,1.5~1.8 mg/L)achieved the initial start of nitrosation faster than the 2^# reactor(low DO,0.3~0.5 mg/L).The average SVI of 1^# and 2^# were 28.5 mL/g and 35.0 mL/g,respectively.After startup,the average ammonia nitrogen volume loads of #1 and #2 were 0.83 kgN/(m^3·d)and 0.87 kgN/(m^3·d),respectively,and the average ammonia nitrogen sludge load were 0.75 kgN/(kgMLSS·d)and 0.37 kgN/(kgMLSS·d),1^# reactor sludge had stronger sludge activity.