Analysis of the Effects of Large Swine Farm Waste in Savannakhet Province, Laos

The effluent wastewater quality from the last ponds of three swine farms in the Lao PDR—TVX, MX, and BSV—was examined in this study. pH, biochemical oxygen demand (BOD), chemical oxygen demand (COD), temperature, and electrical conductivity (EC) were among the factors that were examined. 6.04 ± 0.07, 6.10 ± 2.67 mg/L, 69.93 ± 32.50 mg/L, 30.08 ± 1.05°C, and 677.33 ± 10.07 µS/cm were the average values of these parameters in the TVX farm. 5.92 ± 0.04; 9.55 ± 3.57 mg/L; 50.93 ± 8.07 mg/L; 28.97 ± 0.86°C; and 214.33 ± 51.48 µS/cm were the equivalent averages in the MX farm, whereas the BSV farm had the following: 6.68 ± 0.18; 11.35 ± 0.98 mg/L; 62.73 ± 8.40 mg/L; 35.82 ± 1.11°C; and 236.17 ± 5.24 µS/cm. The findings showed that all three farms' measured parameters fell within the wastewater quality range set by the Lao PDR's Ministry of Natural Resources and Environment (MONRE, 2017) [6]. These results show that the swine farms under study have efficient wastewater treatment systems that guarantee the effluents released into the environment adhere to national environmental regulations.