; or (B) a disadvantaged community, as determined by the Secretary. (3) Eligible projects An eligible project referred to in paragraph (1) is— (A) a project to carry out an energy efficiency audit of a wastewater treatment facility to identify opportunities in the operations of the wastewater treatment facility— (i) to reduce electrical demand; or (ii) to reduce losses in the wastewater treatment facility system; and (B) a project to replace equipment or to carry out other small capital projects to update components of a wastewater treatment facility based on the results of an energy efficiency audit of the wastewater treatment facility. (4) Amount of grant The amount of a grant made under this subsection shall not exceed $25,000. (5) Authorization of appropriations There is authorized to be appropriated to the Secretary to carry out this subsection $5,000,000 for fiscal year 2020 and each fiscal year thereafter, of which not more than 4 percent each fiscal year shall be used for administrative costs. (e) Water and energy efficiency guarantees (1) In general Under the Program, the Secretary shall provide guarantees to eligible municipalities and Tribes to carry out one or more eligible projects described in paragraph (2). (2) Eligible projects An eligible project referred to in paragraph (1) is— (A) a project to convert waste in the treatment process of the wastewater treatment facility into renewable fuels, biosolids, or other byproducts, including— (i) predigestion solids treatment; (ii) installation of anaerobic digesters; (iii) biogas capture; (iv) energy transfer; (v) enhanced nutrient recovery; (vi) material feedstocks; (vii) facility upgrades and retrofits necessary to create or improve waste-to-energy systems; and (viii) other emerging technologies that transform waste to energy