Treatment Efficiency by means of a Nonthermal Plasma Combined with Heterogeneous Catalysis of Odoriferous Volatile Organic Compounds Emissions from the Thermal Drying of Landfill Leachates
Table 2
Odour concentration, VOCOD, NH3, H2S, and TOC concentrations, and % reduction in each day.
Parameter
Day 1
Day 2
Day 3
Average (Days 1–3)
Day 4.1
Day 4.2
Day 4.3
Day 4.4
Odour conc. (dynamic olfactom.)
Inlet conc. (ouE/m3)
13,777
38,968
20,632
24,459
—
—
—
—
Outlet conc. (ouE/m3)
5,161
2,580
4,812
4,184
—
—
—
—
Reduction (%)
63
93
77
78
—
—
—
—
Inlet conc. (μg/m3)
148.4
470.6
195.9
271.6
98.3
92.6
41.2
42.5
Outlet conc. (μg/m3)
51.8
145.8
55.2
84.3
45.8
—
19.3
—
Average VOCOD concentration reduction (%)
65
69
72
69
53
—
53
—
NH3
Inlet conc. (ppmV)
139.3
143
115
132.4
265.2
265.2
170.5
170.5
Outlet conc. (ppmV)
18.1
19.2
13
16.8
50.5
40.6
60.2
43.7
Reduction (%)
87
87
89
87
81
85
65
74
H2S
Inlet conc. (ppmV)
3.7
4.0
2.0
3.2
<0.5
<0.5
<0.5
<0.5
Outlet conc. (ppmV)
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
<0.5
Reduction (%)
>86
>88
>75
>83
n.a.*
n.a.*
n.a.*
n.a.*
TOC
Inlet conc. (mgC/m3)
62.3
46.5
51.5
53.4
167.3
150.1
140
140
Outlet conc. (mgC/m3)
10.5
5.7
3.5
6.6
72.3
129.3
102.5
120.8
Reduction (%)
83
88
93
88
57
14
27
14
Plasma frequency (Hz)
200
200
200
—
200
150
200
100
Effluent : dilution air ratio (v : v)
1 : 5
3 : 5
Catalyst (temperature)
MnO2 (150°C)
MnO2 (50°C)
n.a.: not applicable; the compound was not detected at the inlet or at the outlet. Note: the results indicated as < (value) correspond to the LOD of the corresponding technique.
