以处理模拟生活污水的浸没式膜-生物反应器(SMBR)为依托,在钙离子投加量为200 mg/L的条件下,考察了不同污泥龄(10d、20 d和30 d)对污泥性质以及膜污染的影响.结果表明,随着SRT的延长,TMP的增长速率逐渐降低,膜污染得到了有效缓解,其中SRT为30 d时,膜污染最轻.当SRT从10 d延长到30 d时,SMP的含量明显降低,与膜污染变化趋势是一致的.较长的SRT下钙离子更易于累积,钙离子的累积造成了MLVSS/MLSS值的降低,同时也强化了生物絮凝作用,促进了较大絮体的形成.累积的钙离子主要附着于BEPS中,且通过吸附SMP中带负电荷官能团的多糖,导致了较长SRT下SMP含量的降低和BEPS含量的增加.
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