As with a lot of industries, food and beverage manufacturers consume high volumes of water in their processes. This results in high volumes of wastewater, and with that comes a number of problems and after effects.
Wastewater is exactly that, waste. That waste forms into sludge, the residual solids associated with the primary and secondary phases of the wastewater treatment process. After chemical addition to promote liquid-solid separation in the primary phase of treatment and then from biological sludge after further treatment, the residual solids become a waste sludge.