


                                                                    EXHIBIT 23.1



            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


We consent to the incorporation by reference of our report dated February 13,
2006 accompanying the financial statements of ADA-ES, Inc., which report appears
in the December 31, 2005 Annual Report on Form 10-KSB of ADA-ES, Inc., also
incorporated by reference in this Form S-3 Registration Statement of ADA-ES,
Inc., and to the use of our name and the statements with respect to us, as
appearing under the heading "Experts" in the Registration Statement.


/s/  HEIN & ASSOCIATES LLP
--------------------------
HEIN & ASSOCIATES LLP

Denver, Colorado
August 22, 2006
