Murphy-Brown going for cleaner air using ionisation

Negatively charged ions may soon be clearing the air of dust and other harmful emissions such as ammonia and hydrogen sulfide in your hog and poultry facilities. Electrostatic particle ionisation (EPI) is the key word for this novel environmental technology.     For some reason, an empty tent attracted a lot of attention at the last edition of the World Pork Expo, in Des Moines, Iowa. It was set up in the middle of the Varied Industries Building – and from the outside it seemed