Table 4.6
(continued)
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
Toxic organics
Acenaphthene
<10
<10
NM
<10
<10
NM
<10
ND
>99
Benzene
<10
ND
>99
<10
<10
NM
ND
<10
134
Chloroform
<10
<10
NM
<10
<10
NM
<10
ND
>99
2-Chlorophenol
<10
ND
>99
<10
<10
NM
1,2-Diphenylhydrazine
<10
<10
NM
<10
<10
NM
Fluoranthene
<10
<10
NM
<10
<10
NM
<10
ND
>99
Methylene chloride
62
90
NM
30
23
23
<10
59
NM
Dichlorobromomethane
<10
ND
>99
Naphthalene
<10
<10
NM
ND
<10
NM
<10
ND
>99
2-Nitrophenol
–
–
–
–
–
–
<10
ND
>99
N-Nitrosodiphenylamine
<10
<10
NM
<10
<10
NM
<10
<10
NM
Phenol
<10
<10
NM
<10
ND
>99
39
ND
>99
Bis (2-ethylhexyl)-phthalate
<11
<10
9
<10
<10
NM
<10
<10
NM
Butylbenzyl-phthalate
–
–
–
<10
<10
NM
<10
<10
NM
Di-n-butyl-phthalate
<10
<10
NM
<10
<10
NM
<10
<10
NM
Diethyl phthalate
<10
<10
NM
<10
<10
NM
<10
<10
NM
Dimethyl phthalate
<10
<10
NM
<10
<10
NM
ND
<10
NM
1-2-Benzanthracene
11
<10
55
19
10
47
–
–
–
3,4-Benzopyrene
13
<10
62
<10
<10
NM
–
–
–
11,12-Benzo(k)-fluoranthene 11
<10
55
<10
<10
NM
–
–
–
Chrysene
11
<10
55
Anthracene
<10
<10
NM
<10
<10
NM
<10
<10
NM
1,12-Benzo(ghi) perylene
<10
<10
NM
<10
<10
NM
–
–
–
124
O. S. Amuda et al.