Mich. Comp. Laws § 123.362

Sec. 2. Any city or village may by ordinance provide for a garbage disposal equipment system to acquire, purchase, lease, install, replace or repair garbage disposal equipment. The term "garbage disposal equipment," whenever used in this act, except when otherwise indicated by the context, shall be construed to mean all equipment or machinery of any nature whatsoever and all appurtenances thereto used or useful in treating and reducing garbage and similar waste materials prior to introduction into the sewer system of the city or village, including but not limited to garbage grinders: Provided, That when garbage grinders are installed for such disposal, the city or village shall have a sanitary sewage disposal plant into which the refuse from such garbage grinders is deposited for treatment.