Final answer:
Settling ponds and grease traps are methods used to remove solid matter from feedwater, contributing to the reduction of water pollution by separating solid waste and grease before further treatment.
Step-by-step explanation:
Settling ponds and grease traps are methods used to remove solid matter from feedwater. These are essential components in the wastewater treatment process that separate solid waste and grease from the water before it undergoes further purification. Settling ponds allow solids to settle to the bottom as sludge, while lighter materials like grease float to the top. Grease traps specifically target and capture grease and oils before they enter the treatment facility. These systems contribute significantly to reducing water pollution by removing large particulate matter and preventing clogs and other issues further down the treatment line.
Both ponds and grease traps play a crucial role in ensuring that wastewater is treated effectively, helping to reduce pollution and protect water quality. However, they are not specifically designed to be very effective at removing small colloidal particles from effluent; such fine particles are commonly addressed through tertiary treatment processes like sand filtration or advanced chemical methods.