Which mechanical treatment process involves cutting large pieces of waste into smaller pieces?

The mechanical treatment process that involves cutting large pieces of waste into smaller pieces is comminution. This process employs devices known as comminutors or grinders that are specifically designed to reduce the size of solid waste materials. By breaking down larger items, comminution enhances the efficiency of subsequent treatment processes by ensuring that the material can be processed more easily and effectively.

While shredding may seem closely related and is also about breaking down materials, comminution is specifically focused on cutting waste into smaller, uniform pieces, which is essential in wastewater treatment to prevent clogging and ensure better flow rates through the system.

Screening primarily serves as a method of separating larger debris from the wastewater flow before they reach more sensitive processing stages. Filtering is a process that removes particulates and contaminants from water, but it does not specifically involve cutting or shredding waste. Understanding the distinct roles of these processes helps clarify how they contribute to the overall efficiency and effectiveness of wastewater treatment operations.