21. Mechanically aided scrubbers are capable of high collection efficiencies for particles with diameters of 1 ?m or greater. 22. Particle collection efficiency increases with an increase in nozzle pressure and / or an increase in the liquid-to-gas ratio. 23. One useful aspect of the theoretical collection efficiency is that it is only a function of the RRDE dimensions. 24. The average bill collection rate ( total collection efficiency ) was estimated at 47 % in 2012 / 13. 25. We note that a 100 % collection efficiency is fast approached within a small radius even at moderate field strength. 26. A comparison of collection efficiency at closed and open landfills found about a 17 percentage point difference between the two. 27. The average collection efficiency in 2010 was 84 %, indicating that 16 % of users did not pay their bills. 28. The choice of actual RRDE dimensions is often a trade-off between a large collection efficiency or a short transit time. 29. The presence of a heterojunction offset reduces the collection efficiency of the solar cell and may contribute to low fill-factor. 30. Disruptions of the normal corona process greatly reduce the ESP's collection efficiency , which in severe cases, may fall below 50 %.
