EXHIBIT 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in the Registration Statement on Form S-8
(No. 333-152142) of Energy Recovery, Inc. of our report dated
March 26, 2009, relating to the
consolidated financial statements and financial statement schedule of Energy Recovery, Inc.
included in this Annual Report on Form 10-K.
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/s/ BDO Seidman, LLP |
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San
Jose, California |
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March
26, 2009 |
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