Correlation of C/N Ratio Value with Total Bacteria in Vaname Shrimp Aquaculture Wastewater in Gerokgak, Buleleng

Abstract

Abstract

The study was conducted in Pejarakan Village, Gerokgak District, Buleleng, Bali. The objective was to determine the value and correlation of the C/N ratio with the total bacteria in the wastewater of vannamei shrimp aquaculture. Bacteria spread in the water column and sediment surface and exhibit faster population growth when the C/N ratio is optimal. The study was conducted from October to December 2024 using a descriptive quantitative research method, with purposive sampling from two stations in different vannamei shrimp aquaculture locations. Carbon, nitrogen, and total bacterial content were measured using the Walkley-Black method, Kjeldahl method, and Total Plate Count (TPC), respectively. The results showed average C/N ratios of 12.84 ± 4.10 at station one and 15.94 ± 9.43 at station two. The average total bacterial counts were 1.0 x 10⁵ CFU/ml at station one and 3.2 x 10⁴ CFU/ml at station two. The C/N ratio and total bacterial counts were within safe values for aquaculture wastewater, while correlation tests showed a negative relationship at both stations, with a strong correlation at station one and a weak correlation at station two.