Question

2.9. List various modes of waste disposal. Explain any four of them.

Answer 1

Answer:

Explanation:

Methods of Waste Disposal

·        Landfill

·        The Landfill is the most popularly used method of waste disposal used today. This process of waste disposal focuses attention on burying the waste in the land

·        Incineration/Combustion

·        Incineration or combustion is a type disposal method in which municipal solid wastes are burned at high temperatures so as to convert them into residue and gaseous products. .

·        Recovery and Recycling

·        Resource recovery is the process of taking useful discarded items for a specific next use. These discarded items are then processed to extract or recover materials and resources or convert them to energy in the form of useable heat, electricity or fuel.

·        Recycling is the process of converting waste products into new products to prevent energy usage and consumption of fresh raw materials. Recycling is the third component of Reduce, Reuse and Recycle waste hierarchy. The idea behind recycling is to reduce energy usage, reduce volume of landfills, reduce air and water pollution, reduce greenhouse gas emissions and preserve natural resources for future use.

·        Plasma gasification

Plasma gasification is another form of waste management. Plasma is a primarily an electrically charged or a highly ionized gas. Lighting is one type of plasma which produces temperatures that exceed 12,600 °F . With this method of waste disposal, a vessel uses characteristic plasma torches operating at +10,000 °F which is  creating a gasification zone till 3,000 °F for the conversion of solid or liquid wastes into a syngas

   Landfill

   Incineration

   combustion

   Recovery and recycling

plasma gasification