Typ 0092 Lebendpräparat 1000X
Typ 0092 Gram 1000X
Typ 0092 Neisser 1000X
Type 0092
Widespread in municipal plant in summer months as Microthrix parvicella successor – tends to grow within flakes.
Morphology:
| Filament position: | within flakes |
| Branching: | none |
| Movement: | none |
| Growth habit: | straight / slightly curved |
| Aufwuchs: | absent |
| Constrictions: | absent |
| Sheath: | none |
| Transverse walls: | hard to identify |
| Cell form: | rectangular |
| Length of filaments: | < 200 µm |
| Filament diameter: | 0.8 – 1.0 µm |
| Gram staining: | negative |
| Neisser staining: | positive grey-blue |
Factors promoting growth:
- sludge load < 0.10 kg BSB5/ kg TS * d
- industrial wastewater (dairies, meat and vegetable processing)
- temperatures > 15°C
- raw sewage without preliminary sedimentation
Countermeasures:
- often not necessary as grows within flake and barely index-relevant
- increasing the sludge load
- addition of iron-aluminium sulphate compound products (e.g. FERRASAL, FERRACLAR (III) or Utopur)