TABLE 1. INFLUENCE OF DETENTION TIMES DEPTH ON ALGAL DEVELOPMENT
SOUTHPORT, QUEENSLAND, AUSTRALIA
Date
Depth
Detention
Days
Algal Count
orgs./ml.
Total
Nitrogen
ppm.
Am.-N.
ppm.
Nitrate-N.
ppm.
Phosphate (ppm)
Cells
With Cells Removed
pH
LAGOON INFLUENT
4.11.70-10.3.71
15.4.71-25.8.71
8.9.71 - 6.1.72
LAGOON EFFLUENT 1
4.11.70-10.3.71
18"
15.4.71-25.8.71
8.9.71-6.1.72
LAGOON EFFLUENT 2
4.11.70-10.3.71
36"
15.4.71-25.8.71
8.9.71 - 6.1.72
LAGOON EFFLUENT 3
4.11.70-10.3.71
54"
15.4.71-25.8.71
8.9.71-6.1.72
LAGOON EFFLUENT 4
4.11.70-10.3.71
60"
15.4.71-25.8.71
8.9.71-6.1.72
LAGOON EFFLUENT 5
4.11.70-10.3.71
120"
15.4.71-25.8.71
8.9.71-6.1.72
15
30
Eq.
flow
15
30
17
15
30
31
15
30
42
15
30
50
15
30
60
290,000
499,000
510,000
164,000
797,000
449,000
243,000
1,770,000
330,000
56,000
690,000
201,000
17,000
438,000
189,000
29.0
33.2
41.2
11.3
8.9
12.4
10.6
18.3
11.9
12.1
14.4
14.7
11.4
19.9
16.8
13.6
17.3
19.2
14.0
21.0
26.5
1.9
1.2
2.7
1.5
3.4
1.9
2.5
2.3
3.7
1.0
3.1
3.7
1.1
2.7
3.9
11.8
8.0
9.4
5.9
2.9
2.2
5.7
7.8
3.7
6.5
6.0
5.6
8.1
9.8
7.9
10.6
9.4
9.5
12.4
15.4
15.8
9.7
11.6
13.0
8.3
14.1
13.8
9.7
12.5
14.7
9.6
12.3
14.9
8.2
11.7
14.2
-
9.6
7.3
9.4
8.4
11.1
11.7
9.4
10.2
13.6
8.9
10.2
12.7
7.5
9.7
11.9
6.8
7.0
6.8
8.3
9.1
9.2
8.2
8.6
8.5
7.6
8.7
8.3
8.1
7.4
7.5
7.8
7.9
7.5