Table 2.5
Tertiary treatment of RBC effluent by FF-Cell at Jiminy Peak, MA, USA [18]
Period
Chemicals and dosages
mg/L
BOD. mg/L
COD. mg/L
TSS. mg/L
Total coliforms
No./100 mL
 1000
RBC SC+SF FF-Cell RBC SC+SF FF-Cell RBC SC+SF FF-Cell RBC
SC+SF FF-Cell
Effluent
Effluent
Effluent
Effluent
1
A¼ 16. C
¼ 1.5
9.0
4.2
2.1
40
20
25
19
ND
4
21
8
9
2
A¼ 20.5. D
¼ 1.3
38
24
15
63
39
15
7
1
4
251
146
171
3
A¼ 60. D
¼ 1.3
70
28
25
216
88
70
116
39
10
TNTC 280
65
4
A¼ 90.2. C
¼ 0.03
102
27
26
105
75
63
89
18
10
TNTC 430
112
5
A¼ 43.1. C
¼ 0.004
174
23
11
350
77
81
312
15
30
1630
1.5
1
6
A¼ 10.5. D
¼ 1.2
150
8
4.3
150
19
13
131
21
12
600
ND
ND
7
B¼ 103.8. E
¼ 0.73
118
–
1.6
192
–
5
179
–
15
37.6
–
2.8
Minimum
9.0
4.2
1.6
40
19
5
7
ND
4
21
ND
ND
Range
Maximum
174
28
26
350
88
81
312
39
30
TNTC 430
171
Average
94
19
12
159
53
39
122
16
12
–
144
52
A: Alum as Al
2 O
3 ; B: Ferric chloride; C: Nalco 2PD-462; D: Nalco 7533; E: Nalco 7766
RBC
rotating biological contactors, SC
secondary clarifier, SF
sand
filter, FF-Cell
flotation/filtration, ND
not detectable, TNTC
too numberous to count
2 Water Reclamation
65