摘要
研究了亚硝酸盐作为电子受体对反硝化除磷系统的影响.在实验室模拟SBR反应器,在厌氧/缺氧交替运行方式下,利用模拟生活废水,分别选取不同浓度的亚硝酸盐作为电子受体进行反硝化除磷系统的培养和驯化,对不同亚硝酸盐浓度下反硝化除磷系统的反硝化率以及反硝化吸磷率等因素进行了交叉对比分析.结果表明：在经过长期驯化的条件下,在合适的NO2--N浓度范围内,DPB能以NO2--N为电子受体进行反硝化除磷,抑制浓度为15 mg/L;在低于15 mg/L的浓度范围内,NO2--N的消耗量以及反硝化速率随着起始NO2--N浓度的增大而增加,在15 mg/L之后又随着其浓度的增大而降低;5～15 mg/L NO2--N浓度下的释磷速率以及吸磷量增加得尤为明显,15 mg/L浓度下出现了类似反硝化速率的拐点曲线,在15 mg/L浓度时释磷量和吸磷量均为最高.由此可得本实验中NO2--N的抑制浓度为15 mg/L,缺氧吸磷量与厌氧释磷量有着比较好的线性关系,拟合的直线方程为y=0.580 6＋1.697 4x,两者具有线性的相关关系.
The SBR nitrosation experimental equipment was established to investigate the performance of the nitrite as electron acceptor on removal of phosphorous in nitrosation denitrifying phosphorus removal（NDPR） system.The different concentrations of nitrite were used to cultivate and domesticate the denitrifying phosphorus removal system.With different concentrations of nitrite denitrification rate and denitrifying phosphorus absorption rate in denitrifying phosphorus removal system were investigated.In the range of suitable concentration of NO-2-N and NO-2-N,both of them could become electron acceptor in DPB and result in good denitrifying phosphorus removal after a long time of domestication.When the concentration was less than 15 mg/L,the consumption of NO2_-N and denitrification rate increased with the increase of initial concentration of NO-2-N; when the concentration was more than 15 mg/L,the consumption of NO-2-N and denitrification rate decreased with the increase of initial concentration of NO-2-N; when the concentration was at 15 mg/L,the denitrification rate of NO-2-N become significantly lower,and the consumption of NO-2-N showed a certain value.This phenomenon indicated the denitrification was inhibited when the concentration of electron acceptor was more than 15 mg/L.The Phosphorus release rate and phosphorus uptake increased significantly when the concentration of NO2_-N was 5 mg/L to 15 mg/L.when the concentration of NO-2-N was more than 15 mg/L,the phosphorus release rate and phosphorus uptake decreased with the increase of the concentration of NO2_-N and got the best effect at the concentration of 15 mg/L,which showed a similar performance of study on denitrification.There was a good linear relationship between the aerobic phosphorus uptake and anaerobic phosphorus release amount.The straight line equation was imitated by y =0.580 6 ＋ 1.697 4x,which showed a linear correlation between the two processes.
出处
《重庆理工大学学报（自然科学）》
CAS
2013年第10期48-53,共6页
Journal of Chongqing University of Technology：Natural Science
关键词
亚硝酸盐
反硝化除磷
抑制浓度
反硝化
释磷量
吸磷量
nitrite
denitrifying phosphorus removal
inhibition concentration
denitrification
release of phosphorus
uptake of phosphorus
