EXHIBIT 23(e)


                     CONSENT OF INDEPENDENT PUBLIC AUDITORS



        We consent to the reference to our firm under the caption
        "Experts" in the Registration Statement on Form S-3 and related
        Prospectus of Thermo TerraTech Inc. for the registration of
        111,529 shares of its common stock and to the incorporation by
        reference therein of our report dated February 28, 1995 with
        respect to the financial statements of RETEC/TETRA L.C. included
        in the Current Report on Form 8-K/A of Thermo TerraTech Inc.
        dated December 8, 1995 filed with the Securities and Exchange
        Commission.


                                           ERNST & YOUNG LLP


        Houston, Texas