Efficiency of tube settler on removal of roagulated particles

• Main Authors: Al-Dulaimi Sofyan, Racoviţeanu Gabriel
• Format: Article
• Language: English
• Published: EDP Sciences 2019-01-01
• Series: E3S Web of Conferences
• Online Access: https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/11/e3sconf_enviro2018_07012.pdf

Tube settler systems are one of the practical applications of the shallow sedimentation theory, which was originally developed to improve the performance of conventional sedimentation systems. The efficiency of these systems depends on multiple variables. In this paper, the influence of the tube settler unit at different inclination angles of 60°, 54°, and 48° and at different surface loading rates 2.4 to 0.42 m3/m2.h upon the coagulated particles has been investigated. A laboratory model has been designed and constructed for this purpose, which basically consists of coagulation-flocculation unit followed by tube settler unit. Tube settler unit consists of four separate circular tubes of 27mm inner diameter, with a length of 150cm each. Through the results, tube settler showed high efficiency in removing coagulated particles resulted from the chemical treatment of meat industry effluents. With respect to removal efficiency, it was observed that the change in the surface loading rate had a greater effect than the change in the inclination angle of the tubes. Also, the results indicated that there was a significant improvement in the flow pattern with the reduction in the Reynolds number, within the sedimentation unit, especially in the upper and lower zones of the tubes.