It has been discovered that the size of internal droplets in primary emulsion determines emulsion dispersion and stability in emulsion liquid membrane (ELM) process for removal of lignin from pulping wastewater. Generally, primary emulsion contains kerosene, Aliquat 336, sodium bicarbonate, as well as Span 80 as diluent, carrier, internal phase, and surfactant respectively. Hence, this study had looked into the parameters, including concentration of surfactant, carrier, and stripping agent; emulsification speed and time; as well as agitation speed and time. As a result, the diameter of the smallest droplets (1.4μm) was formed with maximum lignin extraction (95%), minimum swelling (5%) at 3%(w/v) surfactant concentration, 12000 rpm of emulsification within 5 min, 0.01M of Aliquat 336, 0.1M of NaHCO 3, and 250 rpm of extraction within 10 min.