EXHIBIT 23.2

           CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration
Statement on Form S-8 of our reports dated December 27, 2006 relating to the
financial statements and financial statement schedule of Zoltek Companies,
Inc., which appears in Zoltek Companies, Inc.'s Annual Report on Form 10-K for
the year ended September 30, 2006.

/s/ PricewaterhouseCoopers LLP

St. Louis, Missouri
February 22, 2008