What is waste, and its types?

Waste is unwanted or unusable materials. Any substance that is discarded after primary use, defective and of no use.

1. Liquid Waste: Liquid waste refers to all grease, oil, sludges, wash water, waste detergents and dirty water that have been thrown away. They are hazardous and poisonous to our environment and are found in industries as well as households. Example: wastewater.

2. Solid Waste: Solid waste is any garbage, sludge, and refuse found in industrial and commercial locations. Example: a scrap of metals.

3. Organic Waste: Organic waste refers to rotten meat, garden and food waste. This type of rubbish is commonly found in homes. They can be decomposed and turned into manure by the action of microorganisms on them. Example: Peels of fruit and vegetables.

4. Recyclable Waste: All discarded items like metals, furniture, organic waste that can be recycled fall under this category.