| 基于新型反应器的好氧颗粒污泥的稳定性控制 |
| 摘要点击 2428 全文点击 1476 投稿时间：2011-08-04 修订日期：2011-11-09 |
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| 中文关键词 好氧颗粒污泥 密度 粒径 排泥 旋流器 稳定性 |
| 英文关键词 aerobic granules density diameter select the sludge hydrocyclone stability |
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| 中文摘要 |
| 为避免好氧颗粒污泥随着粒径和密度的变化屡次出现其稳定性失去控制,导致好氧颗粒污泥系统运行失败的状况发生,开发了一种新型反应器能够很好地控制好氧颗粒污泥的粒径和密度.新反应器结合旋流器的使用提供了 2种排泥方式,其一是短的沉淀时间,将大粒径和高密度的颗粒污泥存留在反应器中; 其二是一种专有的污泥排除工艺,选择出反应器内潜在的可能存在进一步粒径增长和密度扩大从而破坏反应器运行稳定的大粒径和高密度的颗粒,并将其排除.以上 2种方式保证了反应器内颗粒污泥的粒径长期维持在 300~1000 μm,进而维持整个系统的稳定性.对新型反应器生成的颗粒污泥进行动力学参数的测定,该工艺所形成颗粒的能量维持系数为 0.08~0.10,就新陈代谢活动的代谢途径而言,相比传统颗粒污泥系统发生较大改变,维持新陈代谢活动所消耗 COD较传统工艺偏高.另外,出水水质COD的降解率平均达到 92%,氨氮降解率平均达到 60%. |
| 英文摘要 |
| Uncontrolled variation of diameter and density of aerobic granules frequently resulted in instability and thus brought about operation failure. An innovative reactor was therefore developed for the control of diameter and density of aerobic granules. There were two ways to select the sludge, one was the short settling time select the big and dense granules in the reactor, and the other was the hydro cyclone that washed out the big and compact granules preventing big and compact fourthly growth in the reactor. By these means, the diameter of granules could maintained in the range of 300-1000 μm for a long time, consequently, the long term stability could be obtained. According to the kinetic analysis, it was found that the energy maintenance coefficient was 0.08-0.10, which was much higher than the conventional granular system (0.06), and the ratio of the COD used for maintenance to the influent was higher than the conventional one. Additionally, the removal efficiencies of COD and ammonia were 92% and 60%, respectively. |
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