in-situ groundwater nitrification and de-nitrification ... · pdf filein-situ groundwater...
TRANSCRIPT
![Page 1: In-Situ Groundwater Nitrification and De-Nitrification ... · PDF fileIn-Situ Groundwater Nitrification and De-Nitrification Remediation Processes. Presented by Steve Mailath, EBA](https://reader031.vdocuments.mx/reader031/viewer/2022030416/5aa1fdcd7f8b9aa0108c98de/html5/thumbnails/1.jpg)
In-Situ Groundwater Nitrification and De-Nitrification Remediation Processes
Presented by Steve Mailath, EBA Engineering Consultants
Ltd.Phone: 403.723.6898
![Page 2: In-Situ Groundwater Nitrification and De-Nitrification ... · PDF fileIn-Situ Groundwater Nitrification and De-Nitrification Remediation Processes. Presented by Steve Mailath, EBA](https://reader031.vdocuments.mx/reader031/viewer/2022030416/5aa1fdcd7f8b9aa0108c98de/html5/thumbnails/2.jpg)
Problems with Ammonia and Nitrate
• Over fertilization (eutrophication) of surface waters with N
• Ammonia toxic to animal species – fish and invertebrates
• Nitrate contamination of drinking water– blue baby syndrome – methemoglobinemia
• Discounted value of brown-field development
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Environmental and Regulatory Issues
• Environmental regulations are becoming more stringent with time– Environmental enforcement orders
• Growing public concern of environmental management
• Restricted land use
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Where is the Problem – Who is responsible
• Fertilizer manufacturing and storage facilities– Brown-field developer
• Sewage treatment facilities– City of Calgary
• Agricultural areas– Farmers
• Airports– Calgary airport authority
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Problems with Existing Solutions
• Expense– Treatment facilities– Piping– Operating
• Large footprint, need to close site
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In-Situ Groundwater Nitrification andDe-Nitrification Remediation Processes
In-situ nitrification:• Extracting groundwater• Adding oxygen and nutrients• Injection of amended groundwater
In-situ de-nitrification• Extracting groundwater• Adding carbon and nutrients• Injection of amended groundwater
By: Steve Mailath, EBA Engineering Consultants Ltd.Patent Pending: David Reese, University Technologies International, Phone: 270.2434
Dr. Angus Chu, U of C, Phone: 220.8987Steve Mailath, EBA, Phone: 723.6898
![Page 7: In-Situ Groundwater Nitrification and De-Nitrification ... · PDF fileIn-Situ Groundwater Nitrification and De-Nitrification Remediation Processes. Presented by Steve Mailath, EBA](https://reader031.vdocuments.mx/reader031/viewer/2022030416/5aa1fdcd7f8b9aa0108c98de/html5/thumbnails/7.jpg)
Advantages
• Performs as well as best in class solutions at less than half the cost
• Full mass removal - nitrates reduced to N gas• Small footprint and less intrusive than most
solutions• Requires fewer wells and piping• Year round treatment• Free bio-reactor (in situ)
![Page 8: In-Situ Groundwater Nitrification and De-Nitrification ... · PDF fileIn-Situ Groundwater Nitrification and De-Nitrification Remediation Processes. Presented by Steve Mailath, EBA](https://reader031.vdocuments.mx/reader031/viewer/2022030416/5aa1fdcd7f8b9aa0108c98de/html5/thumbnails/8.jpg)
Options
Options Main Limitations Capital($ Million)
Operating
($/year)
Present Value Cost1
($ million)1. Groundwater Extraction and Irrigation Summer
treatment$0.85 $57,000 $1.4
2. Groundwater Extraction and Discharge to City Sanitary Sewer
Removal of ammonia only
$0.69 $50,000 $1.2
3. Groundwater Extraction and Electrochemical Treatment
High cost $3.1 $155,000 $4.7
4. Groundwater Extraction and Biological Treatment (Nitrification)
High cost $1.6 $100,000 $2.6
5. Groundwater Extraction and Wetlands Disposal
Summer treatment, low N
$0.64 $51,000 $1.2
6. In-Situ Electrochemical Treatment Low perm soils $2.8 >$35,000 >$3.0
7. On-Site Ex-Situ Biological Treatment High cost $5.0 to $7.0
>$35,000 >$5.0
8. In-Situ Nitrification and High perm soils $0.2 $30,000 $0.5
De-Nitrification $0.1 $25,600 $0.41 Present value based upon 15 year life and 5% rate of return.
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Nitrate Plume
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Ammonia Plume
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Site Plot Plan
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Cross-Section A-A’
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Cross-Section D-D’
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Typical Gravel
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Hydraulic Parameters
• Section length 425 m (perpendicular to flow • Section thickness 3.0 m• Hydraulic conductivity 49 m/day• Hydraulic gradient 0.0023• Groundwater velocity 0.3 – 0.5 m/day• Groundwater flux 144 m3/day (22 igpm)• Ammonia concentration 63.2 mg-N/L• Nitrate concentration 94 mg-N/L (i.e., 31 mg-N/L
in-situ plus 63 mg-N/L generatedby nitrification)
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In-Situ Nitrification
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Pilot Test Site
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Test Site
GROUNDWATER FLOW
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Test Site
INJECTIONWELL
EXTRACTION WELL
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Installing Monitoring Wells
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Test Site
TREATMENT SHED
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Nitrification
TREATMENT SHED
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Oxygen Addition
OXYGEN SOURCE
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Amendment Addition
GAS LIQUID REACTOR
NUTRIENT DELIVERY
OXYGEN DELIVERY
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Amendment Addition
VENTURI
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Nitrification Results
0.00
20.00
40.00
60.00
80.00
100.00
120.00
1 5 9 13 17 21 25 29 33 37 41 45 49 53 57 61 65 69 73 77 81 85 89 93 97 101
105
109
113
117
121
125
129
133
137
141
145
149
Days
DO
, Am
mon
ia,
Nitr
ate
- N C
once
ntra
tion
(mg/
L)
0.00
0.20
0.40
0.60
0.80
1.00
1.20
Phos
phat
e - P
Con
cent
ratio
n (m
g/L)
TH13 NH4TH13 NO3TH13 DOTH13 PO44 per. Mov. Avg. (TH13 NH4)4 per. Mov. Avg. (TH13 NO3)4 per. Mov. Avg. (TH13 DO)
66 – 89 % AMMONIA REDUCTION
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In-Situ De-Nitrification
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Pilot Test Site
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Amendment Addition
NUTRIENT DELIVERY
NO OXYGEN DELIVERY
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De-Nitrification
NUTRIENT DELIVERY CARBON
DELIVERY
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Field Lab
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De-Nitrification Results
0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Days
DO
, A
mm
onia
, Nitr
ate
- N C
once
ntra
tion
(mg/
L)
4 per. Mov. Avg. (TH1 DO)4 per. Mov. Avg. (TH1 NH4)4 per. Mov. Avg. (TH1 NO3)
Nitrate
Ammonia
Dissolved oxygen
78 – 99 % NITRATE REDUCTION
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Options
Options Main Limitations Capital($ Million)
Operating($/year)
Present Value Cost1
($ million)1. Groundwater Extraction and Irrigation Summer treatment $0.85 $57,000 $1.4
2. Groundwater Extraction and Discharge to City Sanitary Sewer
Removal of ammonia only
$0.69 $50,000 $1.2
3. Groundwater Extraction and Electrochemical Treatment
High cost $3.1 $155,000 $4.7
4. Groundwater Extraction and Biological Treatment (Nitrification)
High cost $1.6 $100,000 $2.6
5. Groundwater Extraction and Wetlands Disposal
Summer treatment, low N
$0.64 $51,000 $1.2
6. In-Situ Electrochemical Treatment Low perm soils $2.8 >$35,000 >$3.0
7. On-Site Ex-Situ Biological Treatment High cost $5.0 to $7.0 >$35,000 >$5.0
8. In-Situ Nitrification and High perm soils $0.2 $30,000 $0.5
De-Nitrification $0.1 $25,600 $0.41 Present value based upon 15 year life and 5% rate of return.
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Questions
In-Situ Groundwater Nitrification andDe-Nitrification Remediation Processes
By: Steve Mailath, EBA Engineering Consultants Ltd.Patent Pending: David Reese, University Technologies International,
Phone: 270.2434Dr. Angus Chu, U of C, Phone: 220.8987Steve Mailath, EBA, Phone: 723.6898
QUESTIONS
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