In a flow channel, generally, microorganisms derived from bacteria contained in water first attach to a surface, form colonies and then become a pollutant known as biofilm. It is important to control the generation and growth of this pollutant, because it has the disadvantage of causing insanitary conditions inside tubes employed in medical and food processing, resulting in various infections. In the present study, we estimate the process of formation of biofilm inside a glass tube by means of binarization and fractal dimension of light scattering patterns obtained under illumination of a white light source and a laser diode. Experiments are conducted for glass tubes filled with bacteria-containing water without flow and with flow to confirm the feasibility of the present method for monitoring biofilm adhering to their inner surfaces.

通常，在流道中，源自水中所含细菌的微生物首先附着在表面上，形成菌落，然后成为称为生物膜的污染物。控制这种污染物的产生和增长非常重要，因为它的缺点是会导致医疗和食品加工中使用的管道内环境不卫生，从而导致各种感染。在本研究中，我们通过在白光源和激光二极管照射下获得的光散射图案的二值化和分形维数来估计玻璃管内生物膜的形成过程。对装有含细菌水的玻璃管进行无流动和有流动的实验，以证实本方法监测附着在其内表面的生物膜的可行性。