Biomedical Engineering Reference
In-Depth Information
Engineered reed beds are probably the most familiar of all macrophyte treat-
ment systems, with several high profile installations in various parts of the globe
having made the technology very widely accessible and well appreciated. This
approach has been successfully applied to a wide variety of industrial effluents,
in many different climatic conditions and has currently been enjoying consider-
able interest as a 'green' alternative to septic tanks for houses not joined up to
Table7.1
Typicalanalysisforleachatetreatmentbyreed-bedsystems
Component
Inlet conc.
Outlet Conc.
% reduction
Chlorobenzene
83.0
<
1.0
>
98.7
1,2-Dichlorobenzene
2.0
<
1.0
>
50
1,3-Dichlorobenzene
3.6
<
1.0
>
72
1,4-Dichlorobenzene
9.8
<
1.0
>
89
1,2,4-Trichlorobenzene
0.22
<
0.05
>
77
α
-hydrocarbons
0.11
0.037
>
66
β
-hydrocarbons
0.22
<
0.005
>
97.7
γ
-hydrocarbons
0.45
0.026
>
94
δ
-hydrocarbons
1.0
0.21
>
79
ε
-hydrocarbons
1.3
0.31
>
76
2-Chlorophenol
3.7
0.84
>
77
3,4-Chlorophenol
0.63
<
0.5
>
92
2,5-Dichlorophenol
5.0
0.56
>
88
3,4-Dichlorophenol
4.9
<
0.5
>
98.9
3,5-Dichlorophenol
0.93
<
0.5
>
94
2,3,4,6-Tetrachlorophenol
6.4
<
1.0
>
84
Pentachlorophenol
2.7
<
1.0
>
62
2,2
,5,5
-Penta-PCB
0.11
<
0.05
>
54
2,2
,4,4
,5,5
-Hexa-PCB
0.046
<
0.025
>
45
Naphthalene
17.0
<
0.05
>
99.7
1-Methylnapthalene
1.7
<
0.05
>
97
2-Methylnapthalene
0.58
<
0.05
>
91
Acenapthalene
2.2
<
0.05
>
97
Fluorene
3.0
<
0.05
>
98
Phenanthrene
2.7
<
0.05
>
98
Anthracene
0.4
<
0.05
>
87
Pyrene
0.29
<
0.05
>
82
Fluoranthene
0.5
<
0.05
>
90
Trichloroethene
1.8
<
0.05
>
97
Tetrachloroethene
3.1
0.11
>
96
Benzene
52.0
<
1.0
>
98
Toluene
1.8
<
1.0
>
44
Ethylbenzene
16.0
<
1.0
>
93
m-/p- Xylene
4.1
<
1.0
>
75
o-Xylene
3.1
<
1.0
>
67
1,2,4-Trimethylbenzene
3.1
<
1.0
>
67
Concentrations are expressed in micrograms per litre.
After Kickuth.
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