03374nam a2200409 4500 20260817172714.0 120399s1989 th r 0000|00eng d .b10139060 AIT Thesis no. EV-89-14 Prayitno Chromium removal in anaerobic filter and rotating biological contactor processes Bangkok : Asian Institute of Technology, 1989 65 p. Thesis ; no. EV-89-14 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development Thesis (M.Sc.) - Asian Institute of Tehcnology, 1989 A combination of anaerobic filter and rotating biological contactor system at laboratory scale was operated as one unit system to treat synthetic wastewater containing chromium. The soluble COD concentration of wastewater was varied at about 2000, 1400, and 800 mg/1. The combination system was operated at constant detention time, it was 4 hours in the AF unit and 20 hours in the RBC unit, resulting in organic loading rate of 2.02, 1.41 and 0.77 kg SCOD/m3 /d for the whole system or 12.31, 7.99 and 4.67 kg SCOD/m3/d for the anaerobic filter system. No significant differences on the organic carbon removal by varying the organic loading rate with chromium concentration of 5 mg/1 in wastewater. The removal efficiency of soluble COD was 97, 98, and 96 % and chromium removal efficiency was 98, 99, and 98 % for organic loading rate of 2.02, 1.41,and 0.77 kg SCOD/m3 /d respectively. Increasing chromium concentration up to 10 mg/l at organic loading rate of 0.81 kg SCOD/m3 /d was not influenced in SCOD removal as well as chromium removal efficiency. The combination of the anaerobic filter and rotating biological contactor was found to be effective and have a good performance for treating organic wastewater containing chromium in the wide range of organic loading. Half saturation constants in this system were 14.67 and 1000 mg/l for rotating biological contactor and anaerobic filter respectively. Sewage Purification Chromium removal K. Udornsinrot, Chairperson Vigneswaran, Saravanamuthu, Examination Committee Tran, Francis T., Examination Committee USAID - Indonesian GPT II Project ., Scholarship Donor Asian Institute of Technology. Thesis ; no. EV-89-14 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B18013 .b10139060 mnait x 240411 2 951012 m a x 0 mnait mnait mnarc 20 40 Barcode : 30050003044996 CREATED : 1994-05-16 RECORD # : i10158340 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050003045001 CREATED : 1994-05-16 RECORD # : i10158352 LPATRON : 1014358 LCHKIN : 2001-03-01 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 5 TOT RENEW : 1 Barcode : 30050120223218 CREATED : 2016-10-05 RECORD # : i12973804 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 17175 17175 0 0 0 0 MAIN MAIN mnait 2026-08-17 0 AIT Thesis no. EV-89-14 30050003044996 2026-08-17 17:27:14 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 0 AIT Thesis no. EV-89-14 30050003045001 2026-08-17 17:27:14 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no. EV-89-14 30050120223218 2026-08-17 17:27:14 2026-08-17 40