DC low electrostatic voltage particulate filter: PM_0.1 and PM_2.5 emission efficiency measurement

Vehicle emissions in terms of particulate matters PM0.1 and PM2.5 have been recognized to contribute a significant amount of pollutants into the air and adverse to human health. One of the efforts to reduce the emission is by a designing of particulate filtering system. This study develops a filtering system applying DC voltage. The objective of this research was to obtain a particulate filtering system with high efficiency based on the electrostatic principle. The filters were made of an aluminium plate as the anode and cathode probes. These probes applied as collecting probe that connected with a voltage source (4, 6, 8, 10, and 12 volt). The filter efficiency was calculated by using measured concentrations of PM0.1 and PM2.5 emitted by motorcycles before and after passing through the filter. The PM0.1 and PM2.5 concentrations were measured using a TSI 8525 P-Trak Ultrafine Particle Counter and a Kanomax 3443 Digital Dust Monitor. The results showed that the filter efficiency depending on applied DC voltages within the range of 23-35 % for PM0.1 and 29-40 % for PM2.5.