The wastewater from kitchen waste, commonly known as swill, is garbage produced by residents during the process of living and consuming. It is also an important source of urban environmental pollution. It contains a large amount of organic matter, such as food residues, fats, proteins, and carbohydrates. It contains a considerable amount of suspended solids like food residues and fat particles, which may contain trace amounts of detergents and other chemical substances. It contains nutrients such as nitrogen and phosphorus, which may promote eutrophication of water bodies.