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Abstract
Textile industry wastewater contains potentially harmful metals, such as nickel and copper, and has a high Chemical Oxygen Demand (COD). This study investigated the use of hydrodynamic cavitation to reduce COD and color levels in textile wastewater using various orifice plate designs, including 1-star, 1-circular hole, 5-star, and 5-circular hole patterns, combined with two orifice plates in succession. The results showed that the 1- and 5-circular hole arrangements led to significant reductions in COD (78% for 5-circular hole and 65% for 1-circular hole) and color (27% for 5-circular hole and 25% for 1-circular hole). The 1-star pattern design reduced COD by up to 79% and color by 33%, whereas the 5-star pattern design reduced COD by up to 60% and color by 20%. The study concluded that the most effective orifice plate for eliminating COD from textile wastewater is a combination of an 1-star pattern and a 5-circular pattern design. These findings demonstrate the potential of hydrodynamic cavitation as an effective method for reducing harmful pollutants in textile industry effluents.
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