Magnetic treatment could reduce the zeta potential of sludge particle and increase the sludge sedimentation rate correspondingly.

磁作用可以使污泥颗粒zeta电位降低,促进了污泥的沉降速率的提高,活性污泥的脱氢酶活性随着磁场梯度的增加呈现出较明显的增加趋势。

For the disadvantages of slow sedimentation rate and large volume in the physical- chemistry treatment, the coagulating electrical floatation was studied in the article.

针对物化处理洗染废水中絮凝物沉降速度慢，沉降体积大的缺点，本文还研究了混凝—电解气浮法。

Backstripping technique is used in the recovery of subsidence history of wells on the basis of erosion thickness that is calculated by the interval transit-time of mudstone and the sedimentation rate.

本文用泥岩声波时差法和沉积速率法对关键井的地层剥蚀厚度进行了恢复，在此基础之上，用回剥法恢复了关键井的沉降史。