Programme outcome
Mean values: October 2012 / January 2013
Municipal wastewater treatment, 2012–2013.
Initial situation
A municipal plant treating 8,500–10,000 m³/day. A historical BIOFOX programme.
Actions taken
Application began on 9 November 2012 at an operating treatment facility. Performance was assessed by comparing mean water measurements at the secondary clarifier outlet before and after introduction.
Application results
The report records lower mean COD, BOD, suspended solids, ammonium and phosphorus concentrations; dissolved oxygen increased.
| Parameter | October 2012 | January 2013 |
|---|---|---|
| COD, mg/L | 75.5 | 25.5 |
| BOD, mg/L | 22 | 6.62 |
| Suspended solids, mg/L | 27 | 10.8 |
| Ammonium ion, mg/L | 42.2 | 16.1 |
| Phosphorus, mg/L | 4.5 | 1.02 |
| Dissolved oxygen, mg/L | 0.15 | 4.65 |
Site and period
Mean readings at the secondary clarifier outlet for October 2012 and January 2013 are compared. The historical BIOFOX programme began on 9 November 2012; the facility also experienced an abnormal discharge during implementation.
Documentary basis
Application report approved on 17 January 2013.
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