It is the intent of the Legislature by the passage of Sections 17-17-101 through 17-17-135 to authorize municipalities to acquire, own and lease a project for the purpose of promoting the construction and installation of projects for the sale, collection, treatment, processing, reprocessing, generation, distribution, recycling, elimination, or disposal of solid and hazardous waste products, as hereinafter defined, by inducing manufacturing and industrial enterprises, qualified persons, firms, or corporations to locate and construct said projects in this state. It is intended that each project be self-liquidating. Sections 17-17-101 through 17-17-135 shall be construed to conform with its intent. Except as otherwise provided for projects to recycle solid waste products, the powers hereby conferred upon the municipalities shall be exercised only after such municipality has obtained a certificate of public convenience and necessity from the Mississippi Board of Economic Development as provided in Sections 57-1-19, 57-1-21, 57-1-23 and 57-1-27; provided, however, that if a project is constructed solely with revenue bonds the board shall not be required to adjudicate that there are adequate property values and suitable financial conditions so that the total bonded indebtedness of the municipality, solely for the purposes authorized by Sections 17-17-101 through 17-17-135, shall not exceed twenty percent (20%) of the total assessed valuation of the property in the municipality. The powers conferred in this section to municipalities for projects to recycle or sell recycled solid waste products shall be exercised only after such project has been approved by the Department of Environmental Quality and the Mississippi Development Authority.