BOSTON -- A national soybean processing company must pay a $10,995 penalty and install a wastewater pretreatment system at its Ayer manufacturing plant, bringing it into compliance with the Massachusetts Department of Environmental Protection's air pollution and wastewater regulations.

MassDEP announced Monday that Vitasoy USA Inc. agreed to design and install a new, industrial pretreatment system that, along with other process modifications, will lead to compliance with environmental regulations.

The pretreatment system and fine are part of a consent order with MassDEP, agreed upon after state and local officials received and verified numerous complaints of odors coming from the Vitasoy plant at 1 New England Way.

According to MassDEP, the odor was most often caused by the existing industrial wastewater pretreatment system, which was overloaded.

The company had also discharged industrial wastewater to the Ayer sewage treatment plan beyond the limits set by treatment plant officials.

"This company tried many things to attain compliance, but an upgraded pretreatment system is needed," said Lee Dillard Adams, director of MassDEP's Central Regional Office in Worcester. "It is the intent of this action that Vitasoy's operations will no longer create nuisance odors in the surrounding neighborhood."