应用选择器抑制污泥膨胀的20年实践

选择器是在控制丝状菌膨胀实践中孕育而生。丝状菌一般在基质浓度较低的条件下生长，基质浓度较高时菌胶团将要代替丝状菌。根据这一理论，选择器在２０年间逐渐地被开发出来。本文列举了一些成功例子的设计参数和具体结构，并指出了选择器的局限性，即它不能解决所有由丝状菌引起的问题。

Twenty Years Practice of Sludge Bulking Control by Means of a Selector

A selector originated from the practice of filamentous bulking control. The filamentous mi-croorganisms usually grow up under low substrate concentration conditions, and under high onesthey will be replaced by floc -forming microorganisms. According to this theory, the selector hasgradually been developed during the recent twenty years. The design parameters.and structuresof some succesful cases are listed. Also, the limits of using a selector are pointed out, namely,the selector cannot solve all the problems caused by filamentous microorganisms.