Based on the biological characteristics and principles, by analysis of the structure and number of protozoa, we can quickly get useful information on the activated sludge process, and subsequently give directions to the performance.

• 根据原生动物的生物特征及其在不同环境条件下的种属、数量、活性等表现，通过其组成和数量的分析，可以迅速为活性污泥工艺提供有益的指示信息，从而指导污水厂的生产运行。