...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Biotechnology >Assessment of activated sludge stability in lab-scale experiments.
【24h】

Assessment of activated sludge stability in lab-scale experiments.

机译：在实验室规模的实验中评估活性污泥的稳定性。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The majority of activated sludge research is conducted in a laboratory environment with, most often, the start-up sludge being taken from a large-scale wastewater treatment plant. Inoculating this sludge in a lab-scale set-up induces a transient period, which, evidently, has a direct impact on the experimental results during this period of acclimatization. In the currently published literature, the acclimatization period is either neglected or fixed to two or three times the sludge age, without any guarantee that stable conditions are indeed reached. To develop a strategy that assesses the stability of activated sludge, three experiments were performed during which the activated sludge was extensively monitored through a series of physical, microscopic and biochemical analyses. It is demonstrated that it is possible to objectively quantify activated sludge stability through the monitoring of the total averaged filament length per image, the sludge volume index and the maximum specific oxygen uptake rate. Hereto, a moving window approach is adopted: within a 7 days interval the mean slope and the gap between the maximum and minimum value has to be smaller than a pre-specified threshold value. Once stability is reached, the true impact of test conditions can be studied without interference of adaptation phenomena.
机译：大多数活性污泥的研究都是在实验室环境中进行的，大多数情况下，起始污泥取自大型废水处理厂。在实验室规模的设置中接种这种污泥会诱发一个过渡时期，这显然会在此适应时期内对实验结果产生直接影响。在当前公开的文献中，适应期被忽略或固定为污泥龄的两倍或三倍，而不能保证确实达到稳定的条件。为了制定评估活性污泥稳定性的策略，进行了三个实验，在此期间，通过一系列的物理，微观和生化分析广泛监测了活性污泥。结果表明，通过监控每幅图像的平均平均丝长，污泥体积指数和最大比氧吸收率，可以客观地定量活化污泥的稳定性。迄今为止，采用了移动窗口方法：在7天的间隔内，平均斜率和最大值和最小值之间的间隙必须小于预先指定的阈值。一旦达到稳定性，就可以研究测试条件的真正影响，而不会干扰适应现象。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号