Any landowner having lands assessed in the district and not wanting to pay interest on the bonds may, within thirty days after the publication of such notice, pay the county treasurer the full amount of his assessment and have his land released therefrom. Each and every person owning land in the district which is assessed for the construction of an improvement who shall neglect or fail to pay the full amount of his assessment to the county treasurer within the time specified shall be deemed as consenting to the issuing of such drainage bonds and in consideration of the right to pay his assessment in installments he thereby waives his right to any defense against the collection of such assessment because of any irregularity, illegality or defect in the proceedings prior to such time, except in the case of an appeal, as heretofore provided, which shall not be affected by such waiver.