Lutfi A. Nugroho and Endang Dewi Masithah and Woro H. Satyanrini (2019) Evaluation of biofloc technology: the risk of giving different commercial probiotics to C:N and N:P ratio and quality of seawater. AACL Bioflux, 12 (2).

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Abstract

Biofloc technology is the solution to the problem of decreasing water quality related to aquaculture activities. The composition of the microflora in this technology is influenced by carbon, nitrogen and phosphorus through C:N and N:P ratios. This study examined the risks of different commercial probiotics for the ratio of N:P and C:N to biofloc media and the quality of seawater produced. This experiment was carried out with a completely randomized design (CRD) for 8 weeks with 3 treatments, namely probiotics Petrofish (A), Probiotics Pro I (B), and without probiotics (C). After 6 replications, the data were analyzed descriptively and statistically. After giving treatment, ratio of C:N ratio was known in treatment A (2.46), B (1.83) and C (2.21) and N:P ratio in treatment A (22.01), B (22.08) and C (25.96). The treatment of different commercial probiotics in treatment A and treatment B of the ratio C:N and N:P was not significant (p > 0.05). Seawater quality is based on pH parameters (7.94-8.11), dissolved oxygen (2.05-4.24 mg L-1) water temperature (26.5-27.1oC), salinity (22.33- 25.17 ppt) and ammonia level (1-1.6 mg L-1). From the result, we emphasize that giving different commercial probiotics does not have an effect on the values of the C:N and N:P ratio and the seawater quality based on parameter is suitable to the standard.

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