Feasibility study on a wastewater treatment - fish farming system for cola wastes
1988
Santiago, A.E. (Southeast Asian Fisheries Development Center, Binangonan, Rizal (Philippines). Binangonan Research Station. Aquaculture Dept.)
An algae-fish waste treatment pond showed potential for COD removal up to about 88%, treatment of high pH effluent to levels acceptable to both fish (pH 7.0-9.0) and as a medium for raising tilapia. The algae, however, gave low production. Consequently, photosynthetic oxygen input alone was insufficient to satisfy the COD load of the effluent. Paddle wheels and/or aerators, therefore, cannot be maintained. The low algae number (less 100,000 cells/ml) was reflected in the slow growth increment of the test fishes and their low fat content (1%) indicative of starvation. The study concluded that the following are suitable pond design/management criteria: 7-10 days detention time, a depth of 30-50 cm, supplemental oxygen input through the use of aerators and supplemental feeding of tilapia.
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