A sustainable microalgal cultivation approach for the treatment of poultry abattoir wastewater and biofuel production
摘要
Abattoir wastewater, characterized by high pollutant loads including proteins, fats, and meat residues, poses significant environmental risks through non-point source contamination. This study explores an approach to biomass production and wastewater treatment by investigating the ability of microalgae to thrive in poultry abattoir wastewater (PAWW). The main objective of this research is to assess the algal biomass production, biochemical composition, and pollutant removal efficiency of two microalgal strains, Tetraselmis suecica and Micractinium reisseri, across varying concentrations of PAWW (25% to 100%) under controlled laboratory conditions. Results revealed that Tetraselmis suecica achieved the highest biomass (449 mg L−1) and lipid yield (44.2%) at 50% wastewater concentration, while Micractinium reisseri reached a biomass yield of 368 mg L−1 and lipid yield (24.7%) at 25% concentration. For Tetraselmis suecica, maximum yields of carbohydrates (64 mg L−1), proteins (73 mg L−1), chlorophyll (16.3 mg L−1), and carotenoids (42 mg L−1) were recorded. The removal efficiencies for BOD, COD, nitrate, and phosphate using Tetraselmis suecica were 94.3%, 94.5%, 98%, and 79.9%, respectively, compared to Micractinium reisseri, which showed removal rates of 84.7%, 86.2%, 95.4%, and 64.6%. Predominant fatty acids identified included C14, C16:0, C18:0, C18:1, C18:2, and C20:5. These results demonstrate the abattoir wastewater potential as a nutrient-rich medium for algal biomass generation, offering a promising route for wastewater remediation and biofuel generation.