Abstract
Abstract
The surface coating process of shipbuilding produces pollutants in the form of particulate matter (PM10 and PM2,5), potentially generating environmental pollution and respiratory problems in workers. The concentration of indoor particulate matter (PM) can be predicted using mass balance model. This study aims to prove that mass balance can be employed to estimate the concentration of PM. Mass balance is calculated from the concentration of pollutants, inserted into indoor, indoor emission rate, airflow rate and pollutant removal rate. The model estimation results show that PM10 concentrations on the first day, second day, third day and fourth day were 1,22 mg/m3, 1,52 mg/m3, 1,84 mg/m3 and 1,80 mg/m3. While the PM2,5 concentration on the first day, second day, third day and fourth day was 2,67 mg/m3, 3,03 mg/m3, 2,99 mg/m3 and 3,15 mg/m3. The RMSE values on day 1 to day 4 for PM10 were 0.679412, 0.565597, 0.682349, 0,546626, while for PM2.5 are 0,755513, 0,980255, 0,975141 and 1,108106. Giving evidence that mass balance model was reliable that proved by the lower value of RMSE which is generally less than one. It proves that the concentration of PM (PM10 dan PM2,5) is close to actual value of PM concentration from measurement results.