以脱水污泥为接种污泥促进好氧污泥颗粒化

发布时间：2018-01-05 18:00

本文关键词：以脱水污泥为接种污泥促进好氧污泥颗粒化　出处：《中国环境科学》2016年11期 　论文类型：期刊论文

【摘要】：以脱水造粒形成的物理颗粒污泥为接种污泥,明显提高了好氧污泥颗粒化速度.研究结果表明:在第20d,接种物理颗粒污泥的R2中90%以上的污泥粒径即大于0.2mm,而接种絮状污泥的R1中只有26.7%.颗粒化过程中,接种物理颗粒污泥的R2中SVI始终小于80m L/g沉降性能良好,第25d时污泥浓度为6300mg/L,而R1为3200mg/L.脱水过程未对污泥活性造成明显影响,培养期间两者COD去除率均大于90%,但培养后期R2中TN的去除率约为70%,明显优于R1的55%,其主要原因为R2中的污泥粒径大于R1.经过5d的曝气剪切后仍有39.8%的物理颗粒污泥大于0.2mm,为颗粒化提供了大量诱导核,同时物理颗粒污泥内部营养传输孔道的形成与EPS的Qg源消化和反硝化产气有关.
[Abstract]:Physical form granular sludge dehydration and granulation of sludge, improve the aerobic sludge granulation rate. The results show that: in section 20d, inoculation of granular sludge in R2 physics for more than 90% of the sludge particle size is greater than 0.2mm, and the seed sludge in R1 only 26.7%. particles in the process of physical inoculation the granular sludge in R2 SVI 80m L/g is less than the settlement of good performance, the 25d sludge concentration is 6300mg/L, R1 and 3200mg/L. for the dehydration process did not cause significant impact on the activity of the sludge, during the cultivation of both the removal rate of COD was greater than 90%, but after the training period R2 TN removal rate is about 70%, significantly better than R1 55%, the main reason for the R2 in the sludge particle size greater than R1. by 5D after shearing aeration sludge 39.8% physical particles greater than 0.2mm, provide a large number of induced nuclear for granulation, and physical granules nutrition transmission pore shape It is related to the digestion and denitrification of the Qg source of EPS.

【作者单位】：中国矿业大学环境与测绘学院;
【基金】：国家自然科学基金资助项目(51574238) 中国矿业大学大学生创新创业基金立项大学生创新项目(201562)
【分类号】：X703
【正文快照】： 污泥颗粒化技术具有剩余污泥排放量少,对污泥沉降系统要求低,可在高容积负荷下降解高浓度有机废水,所需占地面积小,能实现同时硝化反硝化等特点,因而在污水处理工艺中受到普遍关注[1-3]. 但好氧颗粒污泥的形成过程复杂,影响因素多.近年来,有大量关于促进好氧污泥颗粒化的研究

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