| 泳动床/好氧颗粒污泥新技术处理生活污水的特性研究 |
| 摘要点击 1776 全文点击 1166 投稿时间：2006-10-13 修订日期：2007-02-12 |
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| 中文关键词 泳动床 好氧颗粒污泥 生物膜 污水处理 污泥产率 |
| 英文关键词 swimming bed aerobic granules biofilm wastewater treatment sludge yield |
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| 中文摘要 |
| 基于生物膜法和活性污泥法的联合工艺技术，开发了泳动床/好氧颗粒污泥污水处理新技术.试验阶段，泳动床/好氧颗粒污泥技术表现出高效处理生活污水和实现污泥减量的显著特性.在水力停留时间HRT为3.2 h， COD负荷与NH+4-Ｎ负荷分别为2.03 kg/(m３·d) 和0.52 kg/(m３·d)时，分别获得COD 90.9%和NH+4-Ｎ 98.3%的平均去除效果.系统运行16 d开始出现好氧颗粒污泥，颗粒呈球形、椭球形和棒形，试验阶段混合液悬浮固体浓度MLSS最高达5 640 mg/L， MLVSS/MLSS平均高达0.87.此外，镜检表明好氧颗粒污泥与生物膜均聚集大量的原生动物和后生动物，形成较长和较稳定的食物链，有利于污泥减量，运行过程中污泥产率（MLSS/CODremoved）为0.175 5，仅为普通好氧工艺的50%左右. |
| 英文摘要 |
| Swimming bed combined with aerobic granular sludge as a novel technology for wastewater treatment was developed, which was on the basis of the biofilm process and activated sludge process, and results demonstrated notable performance of high-efficiency treatment capability and sludge reduction. Even when hydraulic retention time (HRT) was only at 3.2 h with average COD volumetric loading of 2.03 kg/(m３·d) and NH+4-Ｎ of 0.52 kg/(m３·d), 90. 9% of average COD removal rate and 98.3% of NH+4-Ｎ removal rate were achieved. Aerobic granular sludge appeared with spherical or rod shape after 16 days operation. Mixed liquor suspended solid (MLSS) concentrations in the reactor reached 5 640 mg/L at the highest during operation period, and the average ratio of mixed liquor volatile suspended solid (MLVSS) to MLSS reached 0.87. Furthermore, microscopic observation of biofilm and aerobic granules revealed much presence of protozoa and metazoa on the biofilm and suspended sludge,and this long food chain can contribute to the sludge reduction. Only 0.175 5 of sludge yields （MLSS/CODremoved） was obtained in the experiment, which was only about 50% of the conventional aerobic processes. |
