Table 3 The 27–4 design used.
From: Reduction of arsenic content in a complex galena concentrate by Acidithiobacillus ferrooxidans
Pattern | Run | Pulp Density % | Surface Area | Ferric Chloride | Carbon Dioxide | Air | 9 K Medium | Strain |
|---|---|---|---|---|---|---|---|---|
----+++ | 1 | 10 | Low | No added | No added | Added | Added | T18 |
--++--+ | 2 | 10 | Low | Added | Added | No added | No added | T18 |
-+-+-+- | 3 | 10 | High | No added | Added | No added | Added | T1 |
-++-+-- | 4 | 10 | High | Added | No added | Added | No added | T1 |
+--++-- | 5 | 20 | Low | No added | Added | Added | No added | T1 |
+-+--+- | 6 | 20 | Low | Added | No added | No added | Added | T1 |
++----+ | 7 | 20 | High | No added | No added | No added | No added | T18 |
+++++++ | 8 | 20 | High | Added | Added | Added | Added | T18 |