摘要
采用厌氧/缺氧序批式反应器(SBR)在不同碳源(乙酸钠、丙酸钠、ρ(乙酸钠)、ρ(丙酸钠)=2∶1和ρ(乙酸钠)∶ρ(丙酸钠)=1∶2)条件下成功培养反硝化聚磷菌(DPB),并利用静态试验研究不同碳源培养的DPB对电子受体的适应性。结果表明,不同碳源条件下DPB系统都能利用硝酸盐和亚硝酸盐脱氮除磷,但利用次序及效率不同:仅硝酸盐为电子受体时,乙酸盐含量越高,反应过程中污泥的亚硝酸盐累积量(0～6.60 mg/g)和反硝化速率越高(4.02～8.58 mg/(g.h)),而除磷率越低(81.1%～91.9%);混合电子受体时吸磷总量、吸磷速率、除磷率均下降,且乙酸盐含量越高其除磷率(53.2%～73.9%)和亚硝酸盐去除率越低(34.7%～86.4%),丙酸盐为主的DPB系统可同步利用硝酸盐和亚硝酸盐,而乙酸盐为主的DPB系统在硝酸盐消耗将尽时亚硝酸盐才被用于反硝化吸磷。
Denitrifying phosphate-accumulating bacteria （DPB） were successfully cultivated in a sequencing batch reactor （SBR） under alternative anaerobic/anoxic conditions and different carbon source conditions （p （sodium acetate） ： p（sodium propionate） = 2 ： 1 and p（sodium acetate） ： p（sodium propionate） = 1 ： 2）. The adaptabilities of DPB to different electron acceptors were investigated through static tests. The results show that both nitrate and nitrite can be used as electron acceptors by DPB under different carbon source conditions, while the utilization order and efficiency are not the same. When nitrate was presented as a single electron acceptor, with the increase of the concentration of sodium acetate, the accumulated nitrite per mixed liquor suspended solids increased （from 0 to 6.60 mg/g） and the denitrification rate per mixed liquor suspended solids increased （ from 4.02 to 8.58 mg/（g ~ h））, while the phosphorus removal efficiency decreased （from 91.9% to 81.1% ）. When nitrite and nitrate were both presented, the total amount of removed phosphorus, the accumulation rate of phosphorus, and the removal efficiency of phosphorus all declined. With an increase of the concentration of sodium acetate, the phosphorus and nitrite removal efficiencies decreased （from 73.9% to 53.2% and from 86.4% to 34./%, respectively）. Both nitrite and nitrate could be well utilized by the DPB system under the condition of sodium propionate being the main carbon source, while nitrite could only be utilized after the depletion of nitrate under the condition of sodium acetate being the main carbon source.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第3期211-217,共7页
Journal of Hohai University(Natural Sciences)
基金
国家自然科学基金(51008112)
国家水体污染控制与治理科技重大专项(2009ZX07317-005
2011ZX07301-002
2012ZX07101-003)
高等学校科技创新重大培育资金(708047)
关键词
碳源
反硝化聚磷菌
电子受体
carbon source
denitrifying phosphate-accumulating bacteria
electron acceptor
