Size Reduction

Size reduction in solid waste management

Size reduction refers to the conversion of solid wastes into smaller portions. This helps to obtain the final product in reasonably uniform and considerably reduced size in comparison to the original form. It is important in the recovery of materials for reuse and for conversion to energy.

Size reduction is an important factor in the development and operation of any solid waste management system. The main purpose of the system is to reduce the size and volume of waste, as compared to its original form, and produce waste of uniform size. Size reduction or compaction refers to densifying wastes in order to reduce their size.

The processing of wastes helps in achieving the best possible benefit from every functional element of the solid waste management system and, therefore, requires a proper selection of techniques and equipment for every element.

The purpose of processing

• Improving efficiency of SWM system
• Recovering material for reuse
• Recovering conversion products and energy

Size reduction equipment benefits

Size reduction involves a number of benefits. It helps improve the life of the product. It also gives a better appearance, texture, and taste to the final product. Some of the important benefits are:

• Reduction in the number of materials to be handled at the disposal site
• Improved efficiency of collection and disposal of wastes
• Increased life of landfills
• Economically viable solid waste management system

These advantages vary from industry to industry. In the chemical industry, size reduction helps increase the surface conductivity, gives the product smoother surface quality, and allows higher particle packing.

For the pharmaceutical industry, particle size reduction helps the drug perform more efficiently. It increases the absorption and uptake of the drug in the body. Size reduction equipment brings with it several benefits, such are:

• The equipment helps with increasing the overall surface area
• The use of the appropriate size reduction equipment allows the generation of uniform particle size.
• This increase in surface area results in a higher rate of absorption. The smaller the particle, the greater is the absorption.