03575nam a2200421 4500 20260817162428.0 310398 th eng .b10082025 AIT Thesis no. 1393 Diep Minh Tam Analysis of seaweed gels and characteristics of gel extraciton wastewater Bangkok : Asian Institute of Technology, 1978 124 p. Thesis ; no. 1393 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science of the Asian Institute of Technology, Bangkok, Thailand Thesis (M.Sc.) - Asian Institute of Technology, 1978 An investigation was made of three genera of seaweeds from Thailand, Gracilaria, Sargassum and Hypnea, sources of agar, algin and carrageenan, respectively. The potential gel yield of these seaweeds was assessed and their gel characteristics, namely gel strength, gelation temperature, melting temperature and color, were studied. Gracilaria seems to have a great promise of exploitation for local utilization, especially those from Chum Porn, Prachuab Khirikhan, Song Khla and Trad. The yield of Gracilaria from these locations varied from high, 30%,to very high, 51%, while their gel strength and color were equal or better than some commercial agars from Japan and the Philippines. Sargassum from Suras Thani also showed some similar promise due to its sodium alginate yield of 21 to 31%, which was generally higher than the yields reportedly obtained from the same genus in some other countries such as India and Taiwan. The Hypnea species did not possess good qualities in their carrageenan although the yield varied from low, 22%, to quite high, 46%. Only one sample from Narathiwas might have potential use in the future. The wastes from the extraction processes were found to be very polluting due to their high contents of total solids , from 5,000 to 10,000 mg/t; chemical oxygen demand values from 2,000 to 5,600 mg/t; relatively high organic matter contents as indicated by volatile solids values from 1400 to 2800 mg/t; a presence of brown color from 300 to 500 units, and some residues of formaldehyde in the case of the al gin extraction waste. Based on the results of waste characteristic analyses, a general treatment procedure was proposed. Sewage Analysis Marine algae Edwards, Peter, Chairperson Samorn Muttamara, Co-Chairperson Nguyen, Cong Thanh, Examination Committee The Government of Japan., Scholarship Donor Asian Institute of Technology. Thesis ; no. 1393 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B23092 .b10082025 mnait x 251118 2 951012 m a x 0 mnait mnarc mnait 20 40 Barcode : 30050003027058 CREATED : 1994-05-16 RECORD # : i10084241 LPATRON : 1012618 LCHKIN : 2001-06-24 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 1 Barcode : 30050160082284 CREATED : 2016-05-13 RECORD # : i12977743 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050121036551 CREATED : 2022-11-24 RECORD # : i13416078 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 4995 4995 0 0 0 0 MAIN MAIN mnait 2026-08-17 10.00 0 AIT Thesis no. 1393 30050003027058 2026-08-17 16:24:28 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no. 1393 30050160082284 2026-08-17 16:24:28 2026-08-17 40 0 0 0 0 MAIN MAIN mnait 2026-08-17 0 AIT Thesis no. 1393 30050121036551 2026-08-17 16:24:28 1 2026-08-17 20