Date of Measuring day

Period

pressure

Productivity (D)

Productivity increase %

Conventional still without vacuum pump

Modified

Still with vacuum pump

Dconvetional

(ml)

Dmodified (ml)

23-12-2014

9 a.m.:16 p.m.

39 kPa (75˚C)

3878

4722

21.8

30-12-2014

9 a.m.:16 p.m.

25 kPa (65˚C)

4276

5298

23.9