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One of the primary advantages of tin lunch boxes is their durability. Unlike plastic alternatives, tin boxes are capable of withstanding significant wear and tear, making them ideal for daily use. They do not break, and their sturdy construction ensures that the contents remain intact during transportation. Additionally, tin is an excellent material for preserving food quality, as it is non-toxic and does not leach harmful chemicals into food, a concern often associated with plastics.
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2. Primary Treatment During primary treatment, the wastewater is allowed to settle in a large tank. This process segregates solids from liquids through sedimentation. Primary clarifiers and settling tanks are vital components of this phase, as they enable the separation of suspended solids from liquid waste. The solid part, known as sludge, is then further treated, while the clarified liquid moves on to secondary treatment.
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