No part of any new, reconstructed or repaired sewer work shall be used for which a certificate of approval has not been issued by the Superintendent of Sewers. Any person or persons attempting to use or flow any sewage into the public sewer system from any new, reconstructed or repaired sewer work without the obtaining of the certificate of approval as herein provided, shall be guilty of a misdemeanor and subject to the fines and penalties herein provided and in addition thereto the Superintendent of Sewers shall proceed forthwith to disconnect such new constructed or repaired sewer work for which no certificate of approval has been issued and may enter upon any public or private property for the purpose of such disconnections.