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不同外碳源对污泥反硝化特性的影响

Keywords: 反硝化特性,甲醇,乙醇,乙酸钠,外碳源

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Abstract:

为了选择最优的反硝化外投碳源,应用SBR和A/O反应器,系统地研究了甲醇、乙醇和乙酸钠作为外碳源时污泥的反硝化特性.甲醇、乙醇和乙酸钠作为外碳源时污泥的比反硝化速率分别为3.2mg/g·h~(-1)、9.6mg/g·h~(-1)和12mg/g·h~(-1).甲醇和乙醇作为外碳源时污泥产率大致相同(约为0.40g/g),而乙酸钠作为外碳源其污泥产率最高(0.65g/g),甲醇作为外碳源时系统启动时间和驯化期长,不能迅速地响应进水水质的变化.乙醇是反硝化处理系统的最优外加碳源,具有反硝化速率高、污泥产率低、响应迅速、来源广且对环境的影响小等优点.

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