Such petition, and objections if any, shall be heard by the court without any unnecessary delay and should the court determine that the formation of such district will be conducive to the public health, convenience, or welfare, the district court shall declare the sanitary and improvement district a public corporation of this state and shall declare five of the trustees nominated, or in case of objection thereto, other suitable trustees who shall be (1) owners of real estate located in the district or (2) designated to serve as a representative on the board of trustees if the real estate is owned by a limited partnership, a general partnership, a limited liability company, a public, private, or municipal corporation, an estate, or a trust, to be the board of trustees of such corporation to serve until their successors are elected and qualified. If any owner of real estate located in the proposed district satisfies the court that his or her real estate, or any part thereof, will not be benefited thereby, then the court may exclude such real estate as will not be benefited and declare the remainder a district as prayed for. No lands included within any municipal corporation shall be included in any sanitary and improvement district, and no tract of twenty acres or more which is outside any municipal corporation and is used primarily for industrial purposes shall be included in any sanitary and improvement district organized under sections 31-727 to 31-762 without the written consent of the owner of such tract.