Medium | A group of microorganisms | Method for determining the presence of microorganisms |
---|---|---|
Waksman | Sulfur-oxidizing bacteria | Determination of changes in SO4 2- ions concentration using reagent tests cat. No. 114791 (Merck, Germany) before and after incubation |
9K | Iron (II) ions oxidizing bacteria | Determination of changes in Fe2+ and Fe3+ ions concentration using a titration method with a EDTA solution against the sulfosalicylic acid index |
Winogradski | Nitrifying bacteria | Determination of changes in NH4 + and NO3- ions using reagent tests cat. No. 100683 and cat. No. 109713 (Merck, Germany) before and after incubation |
Type of the test Specimen | pH | SO4 2- Concentration, %mas | SO4 2- concentration relative to the dissolved phase, %mas | Humidity, % |
---|---|---|---|---|
Concrete film, thickness: 1–2 mm | 7.1 | 22.4 | 54.8 | 23 |
Concrete under the “film”, thickness: 2 cm | 7.7 | 18.5 | 43.6 | 25 |
o.n. | Location of sampling in a sewage well | A group of microorganisms | ||
---|---|---|---|---|
Cast iron plate of the well | Outer coating of concrete (concrete film, thickness approx. 1–2 mm) | Layer of concrete under the film; thickness about 2 cm | ||
1 | +/- | + | + | sulfur-oxidizing |
2 | - | - | + | sulfate-reducing |
3 | + | + | + | Fe2+-oxidizing |
4 | + | + | + | aerobic heterotrophs |
5 | - | + | + | anaerobic heterotrophs |
6 | - | + | + | nitrifiers and denitrifiers |
Waksman medium | 9K Silverman and Lundgren medium | Winogradski medium | |||
---|---|---|---|---|---|
Component | Concentration g/l | Component | Concentration g/l | Component | Concentration g/l |
(NH4)2SO4 | 0.2 | K2HPO4 | 0.5 | (NH4)2SO4 | 2.0 |
KH2PO4 | 3 | (NH4)2SO4 | 3 | K2HPO4 | 1.0 |
MgSO4 · 7 H2O | 0.5 | MgSO4 · 7 H2O | 0.5 | MgSO4 · 7H2O | 0.5 |
CaCl2 · 6 H2O | 0.025 | Ca(NO3)2 | 0.01 | NaCl | 2.0 |
FeSO4 · 7 H2O | traces | KCl | 0.1 | FeSO4 · 7H2O | 0.4 |
S0 | 10 | FeSO4 · 7 H2O | 44.2 | CaCO3 | 10.0 |