Abstract: In a method for removing dimethyl ester vapors or particles emitted from a molten dimethyl ester storage tank, a gaseous mixture containing dimethyl ester vapors or particles and an inert gas are supplied to an inlet port of a water scrubber. Water is continuously sprayed through downstream spray nozzles located inside the water scrubber whereby the water and air mix with the gaseous mixture to form a foamy mixture of dimethyl ester, air and water. Water through an upstream spray nozzle located inside the water scrubber is intermittently sprayed to wash an inner wall of an elongated body and the inlet port of the water scrubber to remove buildup of dimethyl ester particles. The foamy mixture is continuously removed from an outlet port. The water scrubber utilized in the method has an elongated body having an inner wall, a top with an orifice for receiving air, and a bottom with an outlet port. The inlet port is positioned on the body between the top and the bottom of the water scrubber.