Wang Ya-yi, Peng Yong-zhen, Wagn Shu-ying, Song Xue-qi, Wagn Shao-po
School of Munic. and Environ. Eng., Harbin Institute of Technology, Harbin 150090, China.
Huan Jing Ke Xue. 2004 Jul;25(4):54-8.
Effect of added carbon source and nitrate concentration on the denitrifying phosphorus removal by SBR process was systematicaly studied, at the same time the variation of oxidation reductiun potential (ORP) was investigated. The results showed the phosphate release rate and the denitrifying and dephosphorus uptake rate in anoxic phase increased with the high carbon source concentration under anaerobic condition (100-300mg/L). However when the carbon source added in anaerobic phase was high to 300mg/L, the residual COD inhibited the succeed denitrifying dephosphorus uptake. High nitrate concentration (5, 15, 40mg/L) in anoxic phase increased the initial denitrifying dephosphorus rate. Once the nitrate depletes, phosphate uptake changed to phosphate release. Moreover, the time of the turning point occurred later with the higher nitrate addition. ORP can be used as a control parameter of phosphorus release, and it can also indicate the denitrificaiton react degree during the anoxic phosphorus removal but can't be used as control parameter of phosphorus uptake.
系统研究了外加碳源和硝酸盐浓度对SBR工艺反硝化除磷的影响，同时考察了氧化还原电位（ORP）的变化。结果表明，在厌氧条件下（100 - 300mg/L），随着碳源浓度的升高，厌氧阶段的释磷速率以及缺氧阶段的反硝化吸磷速率均增加。然而，当厌氧阶段添加的碳源高达300mg/L时，残留的COD会抑制后续的反硝化吸磷。缺氧阶段较高的硝酸盐浓度（5、15、40mg/L）提高了初始反硝化吸磷速率。一旦硝酸盐耗尽，吸磷就会转变为释磷。此外，硝酸盐添加量越高，转折点出现的时间越晚。ORP可作为释磷的控制参数，也能指示缺氧除磷过程中的反硝化反应程度，但不能作为吸磷的控制参数。
