** Befesa BFSA.DE falls 6% after the hazardous waste recycler reported first-quarter revenue, operating earnings below market expectations
** The company posts quarterly revenue of 285 million euros ($333 million), missing analysts' consensus of 306 million euros
** It also reports EBITDA around 4% below analysts' expectations
** Metzler says the Q1 publication was "light" and warns of inflationary pressures, particularly in natural gas and electricity
** The broker expects higher energy costs due to impacts of the conflict in the Middle East to weigh modestly on future earnings
** The stock sits at the bottom of Germany's small-cap index .SDAXI
($1 = 0.8561 euros)
(Reporting by Danny Callaghan)
((danny.callaghan@thomsonreuters.com))