Final disposal of sludge may include all of the following except:

The final disposal of sludge is a critical component of wastewater treatment and requires methods that effectively manage waste while minimizing environmental impact. The involvement of practices such as composting, sanitary landfills, and land application serves to properly handle and beneficially reuse sludge.

Composting involves the aerobic decomposition of organic materials, which can transform sludge into a stable, soil amendment that is beneficial for agricultural use. Sanitary landfilling provides a controlled environment for the disposal of sludge, where it is layered and compacted to reduce environmental hazards. Land application allows for the beneficial use of treated sludge as a fertilizer, returning nutrients to the soil.

In contrast, vegetable dumping is not a recognized or acceptable method for the disposal of sludge. It implies the indiscriminate disposal of sludge alongside organic waste without proper treatment or consideration for environmental concerns. This practice can lead to contamination of soils and water sources and does not adhere to regulations governing waste management. Therefore, it is not a feasible or appropriate option among the established methods of sludge disposal.