03415nam a2200433 4500 20260817162104.0 021098s1980 th r 0000|0 eng d .b10065891 AIT Thesis no. EV-80-5 Palenewen, Junus Laurens Algal recovery by auto-flocculation Bangkok : Asian Institute of Technology, 1980 v, 74 p. Thesis ; no. EV-80-5 A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 1980 High-rate oxidation pond has high efficiency of BOD removal and algal production of high protein content. Auto-flocculation is used successfully and is the most economical process for algal harvesting. The objective of this study is to recover maximum algal yield by auto flocculation at various growth conditions and to study the effects of these conditions on algal auto-flocculation. AIT sewage was used for feeding the pond, and mixing were carried out by manual brooming twice a day, once a day and without mixing. Sampling of algae-laden water was done through upper and lower tap located at 5 cm and 30 cm under water surface. The algae-laden water is siphoned into the settling pond through these taps, after it is mixed twice a day, once a day and without mixing. The settling pond water is adjusted to pH 8, pH 9, pH 10 and pH 11. Auto-flocculation is used for algal harvesting. Economic considerations of drying techniques costs are presented. Algal production and protein content are calculated. It was found that highest algal concentration was at 30 cm depth at 1 pm to 2 pm and by mixing the pond water once a day at 9 am. Detention time for algal auto-flocculation was 7 hours and pH more than 10 was not suitable for algal auto-flocculation. Sewage Purification Flocculation Nguyen, Cong Thanh, Chairperson Chongrak Polprasert, Co-Chairperson Samorn Muttamara, Examination Committee German Academic Exchange Service (Deutscher Akademischer Austauschdienst), Scholarship Donor Asian Institute of Technology. Thesis ; no. EV-80-5 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B21947 .b10065891 mnait x 250327 2 951012 m a x 0 mnait mnait mnarc mnarc 20 40 Barcode : 30050003040077 CREATED : 1994-05-16 RECORD # : i10062816 LPATRON : 1018322 LCHKIN : 2005-11-23 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 0 Barcode : 30050003040085 CREATED : 1994-05-16 RECORD # : i10062828 LPATRON : 1016334 LCHKIN : 2002-08-11 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 0 Barcode : 30050120226526 CREATED : 2016-04-27 RECORD # : i12958426 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120903702 CREATED : 2020-07-30 RECORD # : i1328535x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 3820 3820 0 0 0 0 MAIN MAIN mnait 2026-08-17 10.00 0 AIT Thesis no. EV-80-5 30050003040077 2026-08-17 16:21:04 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 10.00 0 AIT Thesis no. EV-80-5 30050003040085 2026-08-17 16:21:04 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no. EV-80-5 30050120226526 2026-08-17 16:21:04 2026-08-17 40 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no. EV-80-5 30050120903702 2026-08-17 16:21:04 3 2026-08-17 20