Effects of exposing slimes on rotating disks
411
Table 1
Effect on Nitrate production of enriching the atmosphere
over Stage 1 with oxygen
No Enrichment (1)
With Enrichment (2)
N0 3 -Nmg/1
N0 3 -Nmg/1
Stage 3 (3)
4
5
6
7
8
9
10
0
0
0.3
1.8
4.1
6.5
9.0
10.8
0.3
1.7
3.5
6.0
9.0
—
—
-
(1) May and June, 1970; (2) Aug., Oct., Nov. 1970; (3) Inf. O, N0 3 -N mg/l
B.O.D. s mg/1
T.O.C.
"
S.O.C.
"
N 0 3 - N "
Table 2
Three stage treatment results
Aug., Oct., Nov., 1970 0 2
Enrichment Stage 1
Pilot Inf. Stage 3 Eff.
101
16
74
21
40
7
0
0
Sept. 1970 0 2 Enrichment
Stages 1 and 3
Pilot Inf.
96
70
30
0
Stage 3 Eff.
10
13
1
7.6
Note: Stages 3 to 6 bypassed so that Stage 7, equipped with 71 disks and a Hood enriched
with oxygen, served as Stage 3.