What type of waste is described as non-biodegradable and causes accelerated wear on equipment?

The correct response identifies grit as a type of waste that is non-biodegradable and can lead to accelerated wear on equipment. Grit consists of granular materials such as sand, gravel, and other inorganic particles that do not decompose naturally. In wastewater treatment processes and other industrial applications, grit can accumulate and cause increased abrasion and wear on machinery and equipment, such as pumps, valves, and pipes.

This characteristic makes grit particularly problematic, as it not only contributes to the overall maintenance needs of the equipment but can also decrease the efficiency of operations if not properly managed. Removal of grit is typically a necessary step in various processes to minimize its impact on mechanical systems.

In contrast, sludge consists of organic solids that can undergo anaerobic digestion or other treatment processes, while organic matter can decompose over time. Mesh generally refers to screening materials used to capture larger debris but does not have the same implications for wear and non-biodegradability as grit does.