Fuel cell system and method for operating the same

The invention relates to a fuel cell system comprising a fuel cell exhibiting an anode with a fuel feed line to feed fuel to the anode and an anode exhaust line for removing anode exhaust from the anode and a cathode with an oxygen feed line to feed oxygen to the cathode and a cathode exhaust line to remove cathode exhaust from the cathode and a recirculation line for recirculating anode exhaust to the anode feed line, where the anode exhaust line is connected to a bleed line which allows less than 5% by volume of the anode exhaust to bleed continuously from the anode exhaust.