03247nas a2200433 i 4500 20260817162919.0 150399s1990 th u m rtt 0| a1eng d .b10088301 AIT Thesis no.EV-90-6 Chen, Dar Wen Application of microfiltration with backflush technique in water treatment Bangkok : Asian Institute of Technology, 1990 122 p. Thesis ; no. EV-90-6 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 1990 Detailed experimental studies on backflush technique in crossflow microfiltration is reported. Experiments were conducted at varying backflush frequency and duration and different nature of different suspension. The 1 min. of backflush frequency and 5 sec. of backflush duration were found to be optimum a nd this improved the flux by 200% in the case of Kaolin clay suspension. The application of various of filtration laws proposed by Hermans and Bredee to describe the standard blocking model a nd cake filtration model were verified. From the study conducted in the Kaolin clay and colloids suspension, it was found that no single mechanism was sufficient to describe clogging. The pretreatment of flocculation by alum for prior particle size enlargement was found to improve microfiltration performance significantly. The suitability of crossflow microfiltration with backflush technique for the treatment of natural water and filter back wash wastewater were also studied. The periodic backflush technique applied once in 1 min. for 5 sec. duration was found to be optimum. the flux increase was 250% and 148% for natural water and filter back wash wastewater, respective l y , with backflush technique compared to those without backflush technique. Sewage Purification Filtration Vigneswaran, Saravanamuthu, Chairperson Chongrak Polprasert, Examination Committee Tran, Francis T., Examintion Committee Li, Kim Sun, Examination Committee Republic of China, Scholarship Donor Asian Institute of Technology. Thesis ; no. EV-90-6 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B18357 .b10088301 mnait x 240410 2 951012 m a x 0 mnait mnait mnarc 22 40 20 Barcode : 30050120806715 CREATED : 2014-03-28 RECORD # : i12781526 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120222996 CREATED : 2016-11-05 RECORD # : i12974043 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050121074073 CREATED : 2023-05-04 RECORD # : i13442156 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 6705 6705 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.EV-90-6 30050120806715 2026-08-17 16:29:19 3 2026-08-17 22 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.EV-90-6 30050120222996 2026-08-17 16:29:19 2026-08-17 40 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.EV-90-6 30050121074073 2026-08-17 16:29:19 1 2026-08-17 20