好氧颗粒污泥培养方法及其厌氧化研究

以葡萄糖为底物,普通絮状活性污泥为接种污泥,30目以上4 0目以下木炭颗粒为载体,在类似SBR反应器中提高反应器COD负荷、减少沉淀时间,不断洗出细小分散污泥和絮状污泥,使微生物在木炭颗粒表面附着生长,当COD负荷为3 2kg/ (m3 ·d) ,沉降时间为2 0min时,反应器污泥床中活性污泥实现颗粒化。此阶段下,污泥体积指数SVI为1 8mL/g ,MLSS 90 0 0mg/L。好氧颗粒污泥直径大多2 . 0～2 . 5mm。在好氧颗粒污泥厌氧化研究中,控制温度在30℃,pH值在7 . 5～8. 0之间,停留时间为2 4h ,COD负荷从2kg/ (m3 ·d)增加至4kg/ (m3 ·d) ,COD去除率从4 5 %增加到6 6% ,好氧颗粒污泥在厌氧条件下具有了有机物分解和去除的效果,可以认为转变成了厌氧颗粒污泥。

Studies on Formadon of Aerobic Granular Sludge and its canivaHon to Anaerobic

With the inoculums sludge from a conventional activated sludge wastewater treatment plant and the carrier of charcoal granular,aerobic granular sludge was cultured in SBR fed with glucose as carbon substrate.After increasing COD loading rate to 3.2kg/(m3.d),and decreasing sedimentation time to 20min,sludge were the dominant granular with the diameter 2.0mm to 2.5mm,the SVI 18 mL/g,and MLSS 9000 mg/L.By the anaerobic cultivation with aerobic granular sludge,it was found that the COD removal rate increased from 45% at the beginning to 66% at the 22d.That means the aerobic granular sludge had converted to the anaerobic granular sludge.