摘要
以模拟废水为研究对象,对SBR双颗粒污泥系统的脱氮除磷性能进行了考察.试验结果表明,A2N双颗粒污泥系统能使硝化菌和聚磷菌分别在各自最佳的环境中生长,有利于系统脱氮除磷的稳定和高效运行,可控制性也得到了提高.在COD为300mg·L-1条件下,系统对COD的平均去除率达到78.8%,大部分COD被聚磷菌用来合成PHA;当溶解氧控制在3.55～4.90mg·L-1和5.60～6.60mg·L-1之间时,硝化SBR对氨氮的去除率分别为87.0%和94.5%.除磷SBR仅设置缺氧段时,磷去除率为72%;增设后曝气段后,磷去除率增至85%.NOx--N(NO2--N+NO3--N)的去除主要发生在缺氧段,在反硝化除磷时作为电子受体被去除,平均去除率为90.6%.
By using synthetic wastewater,the characteristics of denitrifying phosphorus removal process in a lab-scale two-sludge anaerobic/anoxic/nitrification SBR（A2NSBR） aerobic granular system was studied.The result showed that the two-sludge system ensured the denitrifying and dephosphorus bacteria to grow at their optimal states,which was favorable for the stability of nitrogen and phosphorus removal efficiency.When the influent COD was controlled at 300 mg · L^-1,the COD removal efficiency was 78.8%.Most of the COD was stored as PHA in polyphosphate accumulating organisms（PAOs）.When DO was controlled at 3.55～4.90 mg · L^-1 and 5.6～6.6 mg · L^-1 in nitrification SBR,the NH＋4-N removal efficiency reached 87.0% and 94.5%,respectively.It was also demonstrated that the removal efficiency of phosphorus was only 72% when there was only settled anoxic phase in A/A/O SBR,while it increased to 85% when post-aeration stage was added.Most of the NO-x-N（NO-2-N＋ NO-3-N） reduction occurred in the anoxic phase,during which NO-x-N was electron acceptors and PHA was electron donors.On average NO-x removal efficiency was 90.6%.
出处
《环境科学学报》
CAS
CSCD
北大核心
2012年第7期1537-1541,共5页
Acta Scientiae Circumstantiae
基金
国家自然科学基金(No.50808004)
北京市教委科技创新平台项目~~
关键词
反硝化除磷
反硝化除磷菌
双污泥工艺
好氧颗粒污泥
SBR
denitrifying phosphorus removal
denitrifying phosphorus removal bacteria
two-sludge process
aerobic granular sludge
sequencingbatch reactor
