环境污染治理技术及原理
郭海娟,马放,沈耀良.C/N比对反硝化除磷效果的影响[J].环境科学学报,2005,25(3):367-371
C/N比对反硝化除磷效果的影响
- Effect of C/N ration on denitrifying dephosphatation
- 基金项目：苏州科技大学江苏省“环境科学与工程”重点实验室开放课题(ZD200103)
- 作者
- 单位
- 郭海娟
- 1. 哈尔滨工业大学市政与环境工程学院, 哈尔滨 150090; 2. 苏州科技学院, 苏州 215011
- 马放
- 哈尔滨工业大学市政与环境工程学院, 哈尔滨 150090
- 沈耀良
- 苏州科技学院, 苏州 215011
- 摘要：在厌氧缺氧(A2)SBR反应器中考察了CN比对反硝化除磷效果的影响.结果表明:CN比对反硝化除磷系统的运行效果影响很大,控制CN比实际上就是控制了系统中反硝化菌和反硝化除磷菌(DPB)这两类菌的优势生长.要想获得理想的反硝化除磷效果,应尽可能使外碳源和硝酸盐不在同一时间内共存,否则需调整二者的比例才能获得氮、磷的完全去除.本试验条件下,当MLSS约为3g·L-1、SRT约为14d,若进水中耗氧有机物(以COD计)、NO3-N和可溶性P的质量比约为250:60:8,系统的运行效果达最佳,去除N、P所需的耗氧有机物(以COD计)最少.
- Abstract：The effect of C/Nratio on denitrifying dephosphatation in an anaerobic/anoxic sequencing batch reactor (A2 SBR) was investigated. The results showed that C/Nratio had great effect on denitrifying dephosphatation. Therefore, rational C/Nratio could provide the optimum operating condition for the predominant growth of both denitrobacter and denitrifying phosphorus removal bacteria(DPB) in the system. To achieve complete denitrifying dephosphatation, the co-existence of exterior carbon source and nitrate should be avoided for the best. Otherwise, the ratio of carbon source and nitrate should be adjusted to achieve the complete nitrogen and phosphorus removal, which could result in more consumption of the required COD. Under the conditions that MLSSwas about 3g·L-1 and SRTwas around 14d in this study, the opitimum removal efficiency was obtained if the influent COD, NO-3-Nand dissolved Pwere about 250, 60 and 8mg·L-1, respectively. And at this condition, a minimum amount of CODwas required to remove both Nand Psimultaneously.
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