Theses and Dissertations


Title: Evaluation of a biofilter for cultre of goldfish (Carassius auratus, Linneaus) in a recirculating water system

Name: Chu, Chung-ling

Degree: MS

Chair: Dr. G. N. Greene

Resides: FAA Library

University: Auburn

Location: Auburn, Alabama

Date: 1966

Pages: 53

Keywords: Biofilter,Goldfish,Carassium auratus,Recirculating system.

Abstract:

The efficiency of biofilters in disposing of organic matter from cultures of goldfish (Carassius auratus, Lin.) under heavy feeding was measured. Fish at the same stocking rate and feeding rate but without a filter died in 10 to 12 days. No fish died in the experimental groups. Fish in the filtered water grew as well as fish receiving frequent water changes simulating a running water environment. The biofilter set-up served an important role in mineralization of the organic matter, thus reducing the oxygen consumption in aquarium water. The large amounts of dissolved organic matter which accumulated in the settling bottles was reduced to half after coming in contact with compressed air and being run through the filter. The filtered groups were more efficient in converting organic nitrogen into ammonium and nitrate or nitrite.

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