THE INFLUENCE OF SUPERFICIAL VELOCITY AND BUBBLE HOLD-UP IN A VERTICAL AERATOR COLUMN TO THE OXYGEN TRANSFER COEFFICIENT
| dc.contributor.author | Pamudji R, Adam | |
| dc.contributor.author | Rochmadi | |
| dc.contributor.author | Kamulyan, Budi | |
| dc.date.accessioned | 2012-06-21T04:27:30Z | |
| dc.date.available | 2012-06-21T04:27:30Z | |
| dc.date.issued | 2010-01 | |
| dc.identifier.citation | Akita, K. dan Yoshida, F., 1974, Bubble Size, Interfacial Area, and Liquid-Phase Massa Transfer Coefficient in Bubble Co-lumns, Ind. Eng. Chem., Process Des. Develop., 13(1), 84-90. Chairul, 2001, Perpindahan Massa Gas – Cair dan Flooding da-lam Kolom Berpenghalang Universitas Gadjah Mada. Clesceri, L.S., Greenberg, A.E., dan Eaton, A.D. (ed.), 1998, Standard Methods for the Examination of Water and Waste Water, Edisi 20, APHA, AWWA, WEF, Washington. Davies, R.M., dan Taylor, G.I., 1950, The Mechanics of Large Bubbles Rising Through Extended Liquids and Through Li-quids in Tubes, Proc. Royal Society, London, A200, pp 375-390 Elfida, S., 2003, Pengaruh Konsentrasi Gelembung Udara Ter-hadap Laju (Transfer) Perpindahan Oksigen Dalam Media Cair Air dan Lumpur Tiruan, Skripsi, Jurusan Teknik Sipil, Universitas Gadjah Mada. Himawan, A. N., 1999, Studi Gerak Spiral Gelembung Udara Individual dan Sebaran Horisontal Kelompok Gelembung Udara dalam Kolom Aerator, Skripsi, Jurusan Teknik Sipil, Universitas Gadjah Mada. Hammer, M.J. dan Hammer Jr., M.J, 2001, Water and Waste Water Technology, Upper Saddle River, New Jersey, Colum-bus, Ohio. Howard, R., 1977, Chemical Reactor Design for Process Plants, Vol. 1: Principles and Techniques. Mashelkar. A. R, 1970, Bubble Columns, British Chemical Engi-neering, 15(10), 1297-1304 . Pracoyo, A., 2000, Pengukuran Koefisien Transfer Massa Oksi-gen dengan Kolom Konis pada Aliran Berlawanan, Tesis, Minat Studi Teknik Sipil, Jurusan Ilmu – Ilmu Teknik, Pro-gram Pasca Sarjana, Universitas Gadjah Mada, Yogyakarta. Purbosani, I., 2001, Pengaruh Konsentrasi Gelembung Udara pada Dispersi Gelembung Udara oleh Dinamika Gerak Spiralnya, Skripsi, Jurusan Teknik Sipil, Universitas Gadjah Mada. Rahardjo, A.P, Kamulyan, B., Rochmadi, 1999, Bentuk dan Ke-cepatan Terminal Gelembung Udara Dalam Air, Forum Teknik Jilid 23, No.2, Juli. Sumiadi, 2001, Interaksi Gerak Gelembung Udara dengan Air pada Kolom Aerator, Tesis, Minat Studi Teknik Sipil, Juru-san Ilmu – Ilmu Teknik, Program Pasca Sarjana, Universi-as Gadjah Mada. Thoenes, D., 1994, Course on Two-phase Reactors, Jurusan Tek-nik Kimia, UGM, 21-26 Juli 1994. Wijayanti, Y., 1998, Dinamika Gelembung Udara dalam Kolom Aerator, Skripsi, Jurusan Teknik Sipil, Fakultas Teknik, Uni-versitas Gadjah Mada. | en_US |
| dc.identifier.issn | 1411-8904 | |
| dc.identifier.uri | http://hdl.handle.net/11617/1655 | |
| dc.description.abstract | To optimize aeration process in a waste water treatment aeration tank, numerical model analyses can be utilized. However, it is necessary to understand the dynamics of air bubble flow within the aeration tank and the oxygen mass transfer from within bubbles to the body of water or waste water. A research for obtaining the relationship between the oxygen mass transfer and the bubble concentration and size has been conducted. Before conducting some experiments involving bubble flow dynamics and oxygen mass transfer measurements, some previous research results on the related subjects was elaborated. Two conditions were considered, those are the bubble flow dynamics and oxygen mass transfer within plain water and within water with artificial sludge. The measurements were done in a two milimeter thick glass walled aerator column of 95 x 95 x 300 mm size. Spargers for air injection were placed on the bottom of the aerator column. Air compressor was used in order to push the air into the bottom of the aerator column. For measuring the discharge of the air flow a rotta meter was installed between the air compressor and the spargers. The bubble dinamics was observed using digital image analyses by a video camera, computers and video capture and image analysis softwares. The oxygen mass transfer was measured through the change of Natrium Sulfide concentration that was added into the water. Cobalt was used as catalist for speeding up the reaction process so that the reaction proses was not controlling the rate of the whole sequence of mass transfer and reaction processes. The result of the research indicates that the individual bubble size remains constant between 3.4 and 3.7 mm within the superficial velocity variation range of between 0.09 and 0.19 cm/s. Furthermore, for any value of superficial velocity, the presence of the artificial sludge increasing the bubble concentration or bubble hold-up. The oxygen mass transfer coefficient appears to be positively influenced by the superficial velocity. | en_US |
| dc.publisher | lppmums | en_US |
| dc.subject | Superficial Velocity | en_US |
| dc.subject | Bubble Hold-up | en_US |
| dc.subject | Oxygen Transfer Coefficient | en_US |
| dc.subject | Vertical Aerator Column | en_US |
| dc.title | THE INFLUENCE OF SUPERFICIAL VELOCITY AND BUBBLE HOLD-UP IN A VERTICAL AERATOR COLUMN TO THE OXYGEN TRANSFER COEFFICIENT | en_US |
| dc.title.alternative | PENGARUH KECEPATAN SUPERFISIAL DAN HOLD-UP GELEMBUNG UDARA PADA KOLOM AERATOR VERTIKAL TERHADAP KOEFISIEN TRANSFER OKSIGEN | en_US |
| dc.type | Article | en_US |
