| 有机负荷对除磷颗粒污泥的培养及特性的影响 |
| 摘要点击 2305 全文点击 1816 投稿时间：2010-07-20 修订日期：2010-11-11 |
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| 中文关键词 SBR 厌氧/好氧 除磷颗粒污泥 有机负荷 除磷效率 |
| 英文关键词 SBR anaerobic/aerobic granular sludge with phosphorus removal organic loading rate efficiency of phosphorus removal |
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| 中文摘要 |
| 采用SBR反应器，以厌氧/好氧方式运行，控制SBR反应器内好氧反应时段饱食期溶解氧水平在1.0～2.0mg/L之间，研究有机负荷对除磷颗粒污泥的培养及其除磷特性的影响.结果表明，当有机负荷(以COD计)为0.482～0.986 kg/(m3·d)时，SBR内的污泥为大量絮体状污泥和少量形状规则的颗粒污泥的混合物；当将有机负荷提高为2.218～2.263 kg/(m3·d)时，污泥开始大量生长，污泥颗粒化进程加快，而后颗粒污泥形状逐渐不规则，分解成小碎片；再次降低有机负荷到1.113～1.182 kg/(m3·d)时，形状规则，界面清晰的颗粒污泥开始形成，最终达到完全颗粒化，成熟颗粒污泥的颜色呈橙黄色、粒径在1～2 mm、污泥的SVI值在20～22 mL/g之间.有机负荷的高低也影响到颗粒污泥的除磷效率，较高的有机负荷［2.218～2.263 kg/(m3·d)］条件下，除磷效率由99%不断下降至78%，即使再次降低有机负荷到1.113～1.182 kg/(m3·d)，除磷效率也没有得到恢复. |
| 英文摘要 |
| In an anaerobic/aerobic sequencing batch reactor (SBR), the effect of organic loading rate (OLR) on the formation and phosphorus removal efficiency of granular sludge was investigated under the condition of 1.0-2.0mg/L of dissolved oxygen (DO) concentration in the period of aerobic feast time in an SBR-cycle. Experiment results showed that the sludge in the SBR was the mixture of a majority of activated sludge floc and a small quantity of round-shaped granular at the OLR of 0.482-0.986 kg/(m3·d). Granulation was accelerated at the early time of the OLR of 2.218-2.263 kg/(m3·d), while the morphology of granules changed to an irregular shape on the end of the OLR of 2.218-2.263 kg/(m3·d). Then the OLR decreased to 1.113-1.182 kg/(m3·d), the mature granules were cultivated successfully. The morphology of the mature granules was nearly spherical with a very clear outline. The dimension of granules was 1-2 mm, and the granular sludge had a good settle ability ［sludge volume index (SVI) between 20-22 mL/g］. The OLR also had influence on efficiency of phosphorus removal, when the OLR was elevated to 2.218-2.263 kg/(m3·d), the efficiency of phosphorus removal declined from 99% to 78%, and could not be recovered even if the OLR was decreased to 1.113-1.182 kg/(m3·d). |
