This study examines the emission properties of particulate matter and particle-bound metals from a diesel engine generator fueled with traditional fossil diesel (D100) with the addition of n-butanol (B), hydrous n-butanol (B′), acetone (A), hydrous acetone (A′), isopropyl alcohol (I) or waste cooking oil-based biodiesel (W). The fuel blends were B30W20D50 (abbrev. B30), B′30W20D50 (as B′30), A3I1W20D76 (as A3), A′3I1W20D76 (as A′3), B30A3I1W20D46 (as B30A3) and B′30A′3I1W20D46 (as B′30A′3) tested at 1.5 kW and 3.0 kW loads of the diesel engine generator. Experimental results indicate that adding B30, A3 or B30A3 reduces the PM mass concentration in the exhaust at both engine loads, in comparison with using only W20. Additionally, the PM emission concentrations are lower using B′30, A′3 and B′30A′3 than using B30, A3 and B30A3, respectively; in other words, replacing pure n-butanol/acetone with hydrated n-butanol/acetone in the blends further reduces the PM emission concentrations. However, B30 or B30A3 is more effective than A3 in reducing the PM emissions, irrespective of the water content in fuel blends. Conversely, using B30, B′30, A3, A′3, B30A3 or B′30A′3 reduces the metal contents in PM emissions at both engine loads compared with using W20. The major metal components in PM are Na, Mg, Al, K, Ca, Fe and Zn, accounting for about 97 wt.% of overall 21 metals. The remaining analyzed metals were dominated by Mn, Ni, Cu, Mo and Ba. Accordingly, adding biodiesel from waste cooking oil, and hydrous acetone/n-butanol, to diesel fuel for diesel engine generators reduces levels of PM and particle-bound metals. The waste hydrous acetone/n-butanol can be used for the recycling purpose in this process.