Table 4.6
Wastewater characterization for plant 36173, carbon and graphite subcategory
Pollutants
Extrusion quench
flow ¼ 7.67 L/s
Impregnation quench
flow ¼ 2.32 L/s
Machining
flow ¼ 1.64 L/s
Influent Effluent Percent removal Influent Effluent Percent removal Influent Effluent Percent removal
TSS
5.0
6.0
NM
19
5.0
74
53
24
55
TOC
1.0
2.0
NM
<10
4.0
NM
7,200
2.0
>99
BOD
2.0
2.0
0
19
7.0
61
6.0
6.0
0
Oil and grease
14
11
21
44
6.0
86
7.0
19
NM
Phenols pH, pH Units
0.02
0.02
0
0.019
0.014
26
0.12
0.01
92
Toxic pollutants,
μg/L
Metals and inorganics
Antimony
<1
1
NM
<1
<1
NM
1
1
0
Arsenic
<1
1
NM
1
1
0
4
<1
88
Beryllium
<5
<1
50
<5
1
30
1
<1
50
Cadmium
<5
<15
NM
<5
5
NM
5
<5
50
Chromium
<15
<15
NM
<15
<13
NM
31
43
NM
Copper
<13
<13
NM
<15
<13
NM
1300
160
84
Cyanide
<10
30
NM
10
10
NM
65
<10
92
Lead
<50
<50
NM
<50
<50
NM
170
440
NM
Mercury
<1
<1
NM
<1
<1
NM
41
<1
NM
Nicke1
<13
<13
NM
<13
<13
NM
70
<13
91
Selenium
2
16
NM
6
2
66
3
13
NM
Silver
<1
<1
NM
<1
<1
NM
7
1
86
Thallium
<1
<1
NM
<1
<1
NM
4
1
75
Zinc
23
140
NM
34
41
NM
240
27
89
(continued)
4 Electrical and Electronic Wastes Treatment
123