Hormel Foods has started its $25-million expansion to build another waste treatment plant.

A Hormel spokesman said Thursday that the plant was on schedule to be completed by next summer.

The new plant, built as a replacement for the current treatment plant, will process excess meat and other hog parts not used in food manufacturing. This new plant will contain regenerative thermal oxidizers, a processor of sorts, which heats hazardous or volatile fumes, converting it to water and carbon dioxide. The oxidizers should eliminate much of the smell from the treatment plant, and is expected to reduce some of the main plant’s odor emissions, Hormel says.