Comparison of the Nitrification Efficiencies of Three Biofilter Media in a Freshwater System

Harwanto, Dicky and Oh, Sung-Yong and Jo, Jae-Yoon (2011) Comparison of the Nitrification Efficiencies of Three Biofilter Media in a Freshwater System. E-FAS (FISHERIES AND AQUATIC SCIENCES), 14 (4). pp. 363-369. ISSN 2234-1749

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Official URL: http://dx.doi.org/10.5657/FAS.2011.0363

Abstract

Total ammonia nitrogen (TAN) removal efficiencies of a sand filter (SF), polystyrene microbead filter (PF), and Kaldnes bead filter (KF) media were evaluated under ammonia loading rates of 5, 25, and 50 g m-3 day-1. The volume of each filter media tested was 7 L, and the water flow rate for all filter media was 24 L/min. The specific surface areas of the SF, PF, and KF were 7,836, 3,287, and 500 m2/m3, respectively. Sand was fluidized and the other two media were trickle filtered. The volumetric TAN removal rate increased with increasing ammonia loading rate for all filter media. Mean volumetric TAN removal rates under the ammonia loading rates of 5, 25, and 50 g m-3 day-1 in SF (39.3, 168.6, and 322.7 g m-3 day-1, respectively) were higher than those in PF (35.0, 157.4, and 310.5 g m-3 day-1, respectively) and KF (32.1, 142.5, and 288.1 g m-3 day-1, respectively). These results were related to differences in the specific surface areas of the filter media. PF was the most economic media for efficiently removing TAN. Key words: Recirculation system, Biofilter media, Nitrification, Freshwater, Ammonia removal

Item Type:Article
Subjects:S Agriculture > SH Aquaculture. Fisheries. Angling
Divisions:Faculty of Fisheries and Marine Sciences > Department of Fisheries
ID Code:42500
Deposited By:Mr Dicky Harwanto
Deposited On:14 Mar 2016 21:16
Last Modified:14 Mar 2016 21:16

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