UPDATE 1-Veolia says committed to Dalkia JV with EDF

* Has first right of refusal if EDF sells 34-pct stake

* Under no obligation to buy out EDF's stake

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PARIS, July 9 (Reuters) - Veolia (VIE.PA) Environnement (VIE.PA) on Thursday reaffirmed its commitment to a partnership with EDF (EDF.PA) in Dalkia after the French power group said it was reviewing its stake in their joint energy subsidiary.

In an interview with French newspaper la Tribune on Thursday, EDF Chief Executive Pierre Gadonneix said:

"We will re-examine our (Dalkia) stake to make it more efficient or get out of it. We shall in no case reinforce ourselves."

A spokeswoman at Veolia said Veolia had the right of first refusal if EDF decided to sell its 34 percent stake in Dalkia, a supplier of energy ervices, but added that Veolia had "no obligation to buy out" the stake.

In March, Veolia Chief Executive Henri Proglio ruled out buying EDF's stake in Dalkia, telling Reuters it would make no sense for EDF to sell.

EDF has said it would trim its 24.5 billion euro debt by 5 billion euros by the end of 2010 through asset disposals.

(Reporting by Benjamin Mallet; Additional reporting by Marie Maitre; Editing by David Cowell)