Abstract
The effect on orthophosphate and polyphosphate levels was investigated for refrigerated or frozen activated sludge samples. A short fractionation procedure was used involving removal of the supernatant, washing with physiological saline, and extraction at 0°C with perchloric acid. It was found that storage at 4°C or -20°C (followed by thawing to 15°C or room temperature) resulted in polyphosphate hydrolysis to orthosphosphate. The latter may have been erroneously interpreted in the past as 'chemical precipitate'.
| Original language | English |
|---|---|
| Pages (from-to) | 257-260 |
| Number of pages | 4 |
| Journal | Water S.A. |
| Volume | 15 |
| Issue number | 4 |
| Publication status | Published - Oct 1989 |
| Externally published | Yes |
ASJC Scopus subject areas
- Applied Microbiology and Biotechnology
- Water Science and Technology
- Waste Management and Disposal
- Management, Monitoring, Policy and Law
