This study aims to determine the effect of variations in pressure and contact time of wastewater with air to decrease the parameters of TSS. COD. and oils and fats contained in palm oil wastewater. This study uses a series of Dissolved Air Flotation (DAF) process units with the addition of Poly Aluminum Chloride (PAC) coagulant. https://www.fitnessgravesyardes.shop/product-category/hrc-board/