Sampling point
Primary treatment:
1
C
C
Plant influent----
G
G
CG
Plant effluent
1
3
C
C
G
(primary--------
G
CG
Trickling filters:
Filter effluent----
C
C
Activated sludge:
1
1
1
Mixed liquor-----
G
G
G
1
1
Return sludge---
G
G
1
2
3
Plant effluent (final)
G
CG
C
G
C
G
G
Sludges sampling:
C
C
Raw sludge (daily)
G
Digested sludge
C
C
(as drawn)------
G
Digester sampling
G
G
(monthly)------
G
G
Supernant
C
(weekly)--------
G
Steam samples
G
G
G
Weekly-------
CComposite samples.
GGrab samples.
1
Once per shift.
2
Before chlorination.
3
Hourly.
Table 2-2. Sampling mg and analysis schedule.
MD0161
2-54