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The ammonia removal capacity of a few kinds of filter media in a water reuse aquaculture system


Journal of the Korean Fisheries Society 20(6): 561-568
The ammonia removal capacity of a few kinds of filter media in a water reuse aquaculture system
The purpose of this study was to find out the removal capacity of harmful ammonia by different filter media in the submerged biological filters in a given space of chamber. Four materials, pile cloth, corrugated skylight roofing plate, embossed plastic plate, and gravel, were used as the experimental filter media. Each filter medium was placed in two aquariums, each aquarium measuring 90 cm .times. 60 cm .times. 60 cm (depth). Under normal operating condition, the average of mean ammonia removal rates during the first and second functioning periods of each filter material which occupied the space in the filter chamber (aquarium) was as follows: 1. Pile cloth: 8.381 g .cntdot. m-3 .cntdot. day-1 2. Corrugated skylight roofing plate: 7.843 g .cntdot. m-3 .cntdot. day-1 3. Embossed plastic plate: 7.797 g .cntdot. m-3 .cntdot. day-1 4. Gravel: 7.051 g .cntdot. m-3 .cntdot. day-1 Thus, there were no significant differences between the media, but at the time of practical application of these materials, some other factors such as investment cost, easiness for the removal of excess detritus accumulated in the interstices of filter media, etc. should be taken into consideration. When large units are required, in particular, removal of excess detritus from the gravel bed is extremely difficult, and in case of pile cloth filters the installation work is much complicated and a problem in supporting the structure when drained also exists. In these respects, corrugated skylight roofing plate and embossed plastic plate seem to be more optimal, but again in pratice the local situation for the availability and the price of the materials should be rechecked and the fitness of the materials in the particular filter chambers under use or under consideration for construction must be taken into account.


Accession: 006599539



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