SBR脱氮系统污泥对磷的去除研究
Chinese Journal of Environmental Engineering(2010)
Abstract
为了研究缺氧(75 min)-好氧(294 min)交替运行的SBR系统中除磷的原因,采用静态实验,对比了不同碳源、水质及运行环境下对磷的去除情况。实验结果表明,该SBR脱氮系统中的好氧段磷的减少是生物去除的结果。当供给碳源为丙酸-乙酸混合物(摩尔比为2∶1)、葡萄糖、淀粉或蛋白胨时,污泥都可将磷去除,去除效率依次降低;COD/NO3--N为8.77∶1(400 mg/L∶45.6 mg/L)时除磷效果明显好于5.41∶1(400 mg/L∶73.9 mg/L)和3.57∶1(400 mg/L∶112 mg/L);进水磷浓度为8 mg/L时,COD由50 mg/L增加到400 mg/L,污泥对磷的去除效果基本一样;完全的缺氧或完全的好氧环境下,污泥对磷的去除能力逐渐丧失。
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Key words
SBR,enhanced biological phosphorus removal,biological nitrogen removal,phosphate accumulating organisms
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