03978cas|a2200433 i 4500 20260819085201.0 170399s1992 th u m rtt 0| a1eng d .b10743054 AIT Thesis no.EV-92-18 Alam, Md. Ashraful Treatment alternatives for sludge handling in water treatment plant, Bangkok Bangkok : Asian Institute of Technology, 1992 110 p. Thesis ; no. EV-92-18 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering Thesis (M.Eng.) - Asian Institute of Technology, 1992 This study was aimed to investigate the use of Crossflow Microfiltration (CFMF) to treat the filter backwash wastewater and Vacmun Assisted Sludge Dewate1ing Bed (VASDB) and Filter Press to treat the clarifier sludge generated from Bangkhan Water Treatment Plant of the Metropolitan Water Works Authority (MWA), Thailand. Crossflow Microfiltration (CFMF) is a pressure driven membrane process allowing better permeate flux by shearing action of flow. It can remove most of the suspended solids present in water and wastewater. Periodic backflash was used as a de-clogging technique to minimize the declining flux resulting from membrane surface deposition and intemal pore clogging. In this study, different sets of CFMF experiments were carried out for raw, settled, flocculation with settling of backwash wastewater. Vacuum Assisted Sludge Dewatering Bed (VASD B) and Filter Press were used for dewatering the sludge generated from clarifiers. Capillary Suction Time (CST) test revealed the optimum dosages of Magnafloc LT 26, an anionic polyelectrolyte to be 0.06 %TS. VASDB works with the combined application of gravity and vacuum pressure. The optimum slt1dge2 toading rate found from VASDB expeiiments for vacuum applied conditioned sludge was 15 kg/(m .d). The cake solid content for conditioned sludge with vacuum application, conditioned sludge without vacuum application and non conditioned sludge without vacuum application were 21.9, 10.2 and 3.9 %TS, respectively at the optimum sludge loading rate. Results from pilot scale filter press study showed that a filtration time of 4 hours is necessary to produce a sludge cake containing more than 30 %TS. The filtrates were clear and light yellowish in color having average SS and turbidity of 25 mg/l and 25 NTU, respectively. A cost comparison between VASDB, Sand Drying Beds and Filter Press indicated that VASDB system is a more cost- effective systems. Water treatment plants Thailand Bangkok Sewage Purification Activated sludge process Samorn Muttamara, Chairperson Visvanathan, C., Examination Committee Mora, J. C., Examination committee Sompol Boonthanon, Examination committee Canadian International Development Authority (CIDA), Scholarship donor Asian Institute of Technology. Thesis ; no. EV-92-18 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B16652 .b10743054 mnait x 240403 2 951012 m a x 0 mnait mnait mnarc 20 40 Barcode : 30050003046728 CREATED : 1994-05-19 RECORD # : i10953152 LPATRON : 1019739 LCHKIN : 2006-01-11 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 0 Barcode : 30050003046736 CREATED : 1994-05-19 RECORD # : i10953164 LPATRON : 1009869 LCHKIN : 1998-01-05 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 0 Barcode : 30050160056098 CREATED : 2016-11-05 RECORD # : i12974791 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 122970 122970 0 0 0 0 MAIN MAIN mnait 2026-08-19 0 AIT Thesis no.EV-92-18 30050003046728 2026-08-19 08:52:01 1 2026-08-19 20 0 0 0 0 MAIN MAIN mnait 2026-08-19 0 AIT Thesis no.EV-92-18 30050003046736 2026-08-19 08:52:01 2 2026-08-19 20 0 0 0 0 MAIN MAIN mnarc 2026-08-19 0 AIT Thesis no.EV-92-18 30050160056098 2026-08-19 08:52:01 2026-08-19 40