三相生物流化床处理对氯酚废水的实验研究

THE STUDY ON TREATMENT OF 4-CP WASTEWATER USING THREE-PHASE BIOLOGICAL FLUIDIZED BED

对氯酚废水是一种毒性很强的废水。本文利用三相生物流化床对对氯酚废水进行实验室模拟降解实验研究。三相生物流化床的特点是采用相对密度>1的细小颗粒为载体,微生物附着在载体的表面,形成一层生物膜。废水至下向上流动,使载体处于流化状态。处理过程中,液相中溶解的或呈胶体状的有机物以及溶解氧从液相进入生物膜,被生物膜中的细胞分解、利用。这样,在生物膜表面与液相中形成一个有机物和溶解氧的浓度梯度,使废水中的有机物不断地被吸附到生物膜上,从而达到连续处理废水的目的[1]。

4-CP wastewater is a highly toxic substance. In this paper , simulated test using three-phase biological fluidized bed （TBFB） to resolve 4-CP wastewater is presented. The characteristic of the TBFB is that the small pellet whose relatively density is 〉 1 is used as carrier, and the microorganism accretes to the surface of the carrier which will form the bio- film. When wastewater fows from bottom to top, the carrier is fluidized. In treatment process, organism dissolved in liquid-phase or being colloidal together with dissolve oxygen permeates through bio-film, which is decomposed and utilized by the cell in the bio-film. Therefor, there is a concentration grads of organism and dissolve oxygen between the surface of bio-film and liquid-phase, which conduce that the organism in wastewater can be adsorbed to the bio- film continually. So, it is possibly to treat wastewater continually.