Transcript H2S Removal Efficiency - Daniel Mechanical Company

A Side-By-Side Test of 4 Different Types of Media
in Bio-trickling Filters
@
Hyperion Treatment Plant
Cyrous Gilani, P.E. (City of Los Angeles)
Kenneth R. Redd, P.E. (City of Los Angeles)
Michael J. Sarullo, P.E. (City of Los Angeles)
R. Tim Haug, Ph.D., P.E., (City of Los Angeles)
WEF/A&WMA ODORS AND AIR POLLUTANTS 2010
Charlotte, North Carolina
March 2010
City of Los Angeles
Dept. of Public Works
Bureau of Engineering
Environmental Engineering Division
Project Background
•
The City is building 2 Air Treatment Facilities (ATFs) along the path of two large
diameter interceptor sewers.
•
The ATFs involve Bio-trickling filter technology as the primary air treatment stage
followed by carbon adsorption as the polishing stage.
•
In an effort to improve the BTF performance, a new media manufactured by
Taiwan based Matala Water Technology was identified and tested at the Hyperion
Plant.
•
Through a joint effort between Daniel Mechanical Company and City of Los
Angeles, a test unit consisting of 4 identical reactor vessels was designed and
manufactured to test different types of media under the same condition (a side-byside comparison test).
•
Installation was completed and testing began June of 2009.
4-Vessels Test unit Fabricated By
Daniel Mechanical Company
• 3’ Diameter, 10’ high
• One level media, 3’ high
• 2’ Sump at the bottom of
each unit
• Re-cycled Irrigation
supplemented with
nutrient
• Continuous Irrigation
• Continuous make-up
water and nutrient
4-Vessels Test Unit
By Daniel Mechanical @ HTP
4-Vessels Test Unit
Top View
4-Vessels Test Unit
By Daniel Mechanical @ HTP
Recirculation and Nutrient System
Make-Up Water and Drain Systems
Foul Air Supplied to Each Unit Through one
Manifold System
Separate Nutrient Tank for Each Unit
Selected Media
Selected Media
Matala SM 365
Lava Rock Media
Zander Media
Virgin Carbon
Spray Pattern Adjustment
H2S Removal Efficiency (Matala)
Start-Up
Four Vessel Bio-Trickling Filter Test Using Matala Media
Inlet H2S
Outlet H2S
Percent H2S Rem oved
7/1/09
100%
80
80%
60
60%
40
40%
20
20%
0
0%
0
5
10
15
Days since 01-Jun-2009
20
25
30
Percent H 2S Removed
H2S Concentration, ppmv
6/1/09
100
H2S Removal Efficiency (Zander)
Start-Up
Four Vessel Bio-Trickling Filter Test Using Zander Media
Inlet H2S
Outlet H2S
Percent H2S Rem oved
7/1/09
100%
80
80%
60
60%
40
40%
20
20%
0
0%
0
5
10
15
Days since 01-Jun-2009
20
25
30
Percent H 2S Removed
H2S Concentration, ppmv
6/1/09
100
H2S Removal Efficiency (Lava Rock)
Start-Up
Four Vessel Bio-Trickling Filter Test Using Lava Rock
Inlet H2S
Outlet H2S
Percent H2S Rem oved
7/1/09
100%
80
80%
60
60%
40
40%
20
20%
0
0%
0
5
10
15
Days since 01-Jun-2009
20
25
30
Percent H 2S Removed
H2S Concentration, ppmv
6/1/09
100
H2S Removal Efficiency (Matala)
2nd Start-Up
Four Vessel Bio-Trickling Filter Test Using Matala Media
Outlet H2S
H2S Concentration, ppmv
8/1/09
Percent H2S Rem oved
9/1/09
10/1/09
100
100%
80
80%
60
60%
40
40%
20
20%
0
0%
0
10
20
30
40
Days since 15-July-2009
50
60
70
80
Percent H 2S Removed
Inlet H2S
H2S Removal Efficiency (Zander)
2nd Start-Up
Four Vessel Bio-Trickling Filter Test Using Zander Media
Outlet H2S
H2S Concentration, ppmv
8/1/09
Percent H2S Rem oved
9/1/09
10/1/09
100
100%
80
80%
60
60%
40
40%
20
20%
0
0%
0
10
20
30
40
Days since 15-July-2009
50
60
70
80
Percent H 2S Removed
Inlet H2S
H2S Removal Efficiency (Lava Rock)
2nd Start-Up
Four Vessel Bio-Trickling Filter Test Using Lava Rock
Outlet H2S
date
H2S Concentration, ppmv
8/1/09
Percent H2S Rem oved
9/1/09
10/1/09
100
100%
80
80%
60
60%
40
40%
20
20%
0
0%
0
10
20
30
40
Days since 15-July-2009
50
60
70
80
Percent H 2S Removed
Inlet H2S
Odor Removal All Media
50,000
Odor Level
40,000
30,000
20,000
10,000
0
10/08/09
Inlet
10/15/09
Matala
10/29/09
Zander
11/19/09
Lava Rock
% Odor Removal All Media
Percent Odor Removed
95%
90%
85%
80%
75%
10/08/09
10/15/09
Matala
10/29/09
Zander
11/19/09
Lava Rock
H2S Removal All Media on the Odor Test Event
60
50
H2S, ppmv
40
30
20
10
0
10/08/09
Inlet
10/15/09
Matala
10/29/09
Zander
11/19/09
Lava Rock
% H2S Removed All Media on the Odor Test Event
Percent H2S Removed
100%
95%
90%
85%
80%
10/08/09
10/15/09
Matala
10/29/09
Zander
11/19/09
Lava Rock
H2S Mass Loading, 15 Sec EBRT, Matala
H2S Mass Loading w/15 s Residence Time
Matala Media
H2S Elimination Capacity, ((g/m^3)/Hr.)
30
25
20
15
10
5
0
0
5
10
15
20
H2S Mass Loading, ((g/m^3)/Hr.)
25
30
H2S Mass Loading, 15 Sec EBRT, Zander
H2S Mass Loading w/15 s Residence Time
Zander Media
H2S Elimination Capacity, ((g/m^3)/Hr.)
30
25
20
15
10
5
0
0
5
10
15
20
H2S Mass Loading, ((g/m^3)/Hr.)
25
30
H2S Mass Loading, 15 Sec EBRT, Lava Rock
H2S Mass Loading w/15 s Residence Time
Lava Rock Media
H2S Elimination Capacity, ((g/m^3)/Hr.)
30
25
20
15
10
5
0
0
5
10
15
20
H2S Mass Loading, ((g/m^3)/Hr.)
25
30
Summary of Performance
•
Effective and consistent H2S removal on all three media.
•
The vessel containing the lava rock performed well during the 1st start-up. However, during
the 2nd start-up, its performance dropped.
•
The pH of the vessel containing lava rock was measured to be approximately 2.5 for the
duration of this test. Numerous attempts were made to lower the pH by reducing the make-up
water. Lowering the rate of the make-up water did not affect the pH.
•
Matala and Zander both demonstrated excellent performance in terms of H2S removal.
•
Although all three media effectively removed H2S, significant amounts of odors attributed to
other odor causing compounds, remained in the outlet air stream of each vessel.
•
Inlet odor measurements ranged from 10,000 to 50,000 odor units, while outlet odor
measurements for all three media ranged from 2,500 to 5,000 odor units.
•
There was no direct correlation between remaining odors and H2S levels in the outlet air
stream, indicating that the majority of remaining odors were not caused by H2S.
NCOS ATF Site
Under Construction
NCOS ATF Site
Under Construction
ECIS ATF Site
Under Construction
ECIS ATF Site
Under Construction
WEF/A&WMA ODORS AND AIR POLLUTANTS 2010
Charlotte, North Carolina
March 2010
QUESTIONS
City of Los Angeles
Dept. of Public Works
Bureau of Engineering
Environmental Engineering Division