Embed Size (px)
Citation preview
A novel methodology to quantify nitrous oxide emissions from full-scale
wastewater treatment systems with surface aerators
Liu Yea,b, Bing-Jie Nia, Yingyu Lawa,c, Craig Byersd, Zhiguo Yuana,*
a Advanced Water Management Centre, The University of Queensland, QLD, Australia
b School of Chemical Engineering, The University of Queensland, QLD, Australia
c Nanyang Technological University, SCELSE, Singapore 637551, Singapore
d Water Corporation, Perth, WA, Australia
* Corresponding author: Email: [email protected]; Tel: (61) 7 33654374; Fax: (61) 7
33654726
Summary: There are six pages in the supporting information section, including one table and
4 figures.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Table S1. Details of sampling locations, time, frequency and data collection at the studied WWTP in Australia
Sampling
location
(#)
Location
Description
Sampling
Time/duration
Type of
samples
Frequency Analysis Plant Data
collected
a Raw sewage 18thOct-13th
Nov 2011
Liquid-phase 1 composite sample,
Daily
TCOD, TKN,
NH3-N, NOx-
N
On-line flow
rate
b Effluent 18thOct-13th
Nov 2011
Liquid-phase 1 composite sample,
Daily
TCOD, TKN,
NH3-N, NOx-
N
On-line flow
rate
c Sludge cake 18thOct-13th
Nov 2011
Liquid-phase 1 sample from each
batch of sludge
transported
TCOD, TKN, sludge weight
transported out
d
1 End-OD
Entrance of
influent
18th ,19th ,20th
Oct 2011 and
17th April 2012
Liquid-phase 4 days, intensive
sampling, hourly sample
N2O, CH4,
NH3-N, NOx-
N, T, pH, DO
2 Mid-OD Anoxic 18th ,19th ,20th
Oct 2011 and
17th April 2012
Gas-phaseLiquid-phase 4 days, intensive
sampling, hourly
sample- liquidHalf-houly sample -gas
N2O, CH4,
NH3-N, NOx-
N, T, pH,DO
3 End-OD
Before Aerator2
18th ,19th ,20th
Oct 2011 and
17th April 2012
Liquid-phase4 days, intensive
sampling, hourly sample
N2O, CH4,
NH3-N, NOx-
N, T, pH, DO
4 End-OD
At Aerator2
18th ,19th ,20th
Oct 2011 and
17th April 2012
Liquid-phase4 days, intensive
sampling, hourly sample
N2O, CH4,
NH3-N, NOx-
N, T, pH, DO-
depth
On-line
Aerator
frequency for
whole month
5 Mid-OD aerobic 18th ,19th ,20th
Oct 2011 and
17th April 2012
Gas-phaseLiquid-phase 4 days, intensive
sampling, hourly
sample- liquid
Half-houly sample -gas
N2O, CH4,
NH3-N, NOx-
N, T, pH, DO-
depth
On-line DO
data for whole
month
6 End-OD anoxic 18th ,19th ,20th
Oct 2011 and
17th April 2012
Liquid-phase4 days, intensive
sampling, hourly sample
N2O, CH4,
NH3-N, NOx-
N, T, pH, DO
e WAS 18thOct-13th
Nov 2011
------- -------- On-line
flow rate
15
16
17
Figure S1. (Left) An example time-varying aerator frequency (f (t)) profile; (Right) An
example of measured DO profile at d5
Figure S2. Influent and effluent characteristics of the studied plant during a month-long
sampling campaign
18
19
20
21
22
23
24
25
26
27
28
29
30
31
d4
Time (h)
0 12 24 36 48 60 72
N2O
(ugN
L-1)
0
2
4
6
8
10
12
14
16
d5
Time (h)
0 12 24 36 48 60 72
N2O
(ugN
L-1
)
0
2
4
6
8
10
12
14
16
d6
Time (h)
0 12 24 36 48 60 72
N2O
(ugN
L-1
)
0
2
4
6
8
10
12
14
16
d3
Time (h)
0 12 24 36 48 60 72
N2O
(ugN
L-1)
0
2
4
6
8
10
12
14
16
d2
Time (h)
0 12 24 36 48 60 72
N2O
(ugN
L-1)
0
2
4
6
8
10
12
14
16
d1
Time (h)
0 12 24 36 48 60 72
N2O
(ugN
L-1)
0
2
4
6
8
10
12
14
16
Figure S3. The measured (dot points) and simulated (red line) dissolved N2O concentration
at all sampling locations (d1, d2, d3, d4, d5 and d6) during the first intensive sampling round
(18th -20th Oct 2011).
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
Figure S4. The measured ammonium, nitrite
and nitrate concentration at all sampling
54
55
56
57
58
59
60
locations (d1, d2, d3, d4, d5 and d6) during the two intensive sampling rounds (8 hours on
18th – 20th Oct 2011 and 13 hours on18th April 2012).
61
62
