Transcript Phosphorous Reduction & Manure Management Research in Idaho

Phosphorous Reduction &
Manure Management Research
in Idaho
Mario E. de Haro Martí
Dairy/Livestock Environmental Education
Operation of a Struvite Dairy Wastewater
Phosphorus Removal System
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Portable Struvite Crystallizer
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Evaluate various wastewater
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Trailer mounted
Continue collaboration with
WSU, CSU, Iowa State
Dairy Wastewater
Potato Wastewater
WW Sludge Effluent
Acidification Pre-Treatment
4 N:24 P: 0 K
Struvite (MgNH4PO4*6 H2O)
ORGANIC Dairy
Wastewater Phosphorus
Removal
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Collaboration with
Colorado State University
Chemical Process
Modification
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Acetic Acid vs Hydrochloric
Acid (pretreatment acidification)
Potassium Hydroxide vs
Ammonia (reaction catalyst)
System
Flow
Meter
Mg
Pum
p
Mg In NH3 In
Crop Response
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Theoretical Solubility
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Laboratory
Greenhouse Trials
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Wheat
Mg Solution
Inflow Ph
Meter
Change in Crystal Properties
Non-acidified Struvite
Acidified Struvite
Crystallization Results
Struvite Crystallization
UI Experience Considerations
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Experimental conditions
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30% TP reduction under normal operation
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Up to 50% TP reduction under
acidification, increasing chemicals usage
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Operating cost to get 50% reduction
calculated to be >$2/cow/month
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New research needed to lower costs and
simplify operation
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Option for organic farms?
Phosphorus and Ammonia Removal
System for an Openlot Dairy
P
removal system using Lime
to reduce phosphorous
 Similar
technology is used on
the swine industry
 Demonstrate
reduction of P
loading and NH3 emissions
 P-Removal
and Nitrification
treatment system for a
2,000-hd dairy
Calcium Phosphate Separation
Developed by USDA-ARS Florence, SC
CaPO4 Clarifier
12 ft
6 ft
Low P Effluent Overflow
9 ft
Sludge Removal
Lime (CaCO3) slurry
(1 lime: 2 water)
SuperSoils System
B&B Farm, Clinton, NC
pH controller
12 ft
Lime pump
pH probe
Lime mixing
tank
6 ft
“Dirty” water enters through center
Gravity overflow to clarifier
Ultrasonic Level Sensor for process control
5% Lime
Slurry
1% Lime
Slurry
Settling
Only
Separated
Parlor Water
12
10
8
Total
Phosphorus 6
(ppm)
4
2
0
10.2% Volume
5% Volume
2.5% Volume
Separated 0.83%
Liquid Lime
Slurry
1.67%
Lime
slurry
2.50%
Lime
Slurry
3.33%
Lime
Slurry
4.17%
Lime
Slurry
Considerations on Phosphorous
Separation Using Lime
 Very promising results at laboratory level
 Up to 84% TP removal on dairy parlor
wastewater
 Great reduction of odors
 50%+ TP removal expected on slurry
 More research needed on wastewater –
slurry – lime concentration combinations
 Amount to use on a big dairy and cost of
lime is a limiting factor today
Effect of the Installation of an Anaerobic
Digester on Farmstead Air Emissions
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6-mo. Pre and Post
Digester
Construction/Operation
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May – December, 2007 (Pre)
April – December, 2008
(Post)
West Point Dairy, Wendell
 UV Sentry Monitoring with
WindTrax Emissions
Modeling
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Fixed UV-DOAS
position
Mobil UV-DOAS
Wind direction during
sample period
DEQ 10-m Weather Tower
Summer
1
2
Winter
Spring, Fall
3
Late Summer
(low velocity)
Anaerobic digester
Emissions Methodology Evaluation
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Compare open-area
emissions monitoring
methods
West Point Dairy
Oct 1 – 7, 2007
UV-DOAS
FTIR
Wind Tunnel w/
chemiluminescence
NH3 Denuder
Passive NH3
Mass-balance &
existing table values
Fly Larvae Utilization of Manure
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Soldier Fly Larvae
Utilize manure solids as
larval feed source
When larvae are ready
to crystallize, they
crawl out and away
from manure (selfharvesting!!)
Harvested larvae are
dried and used as
protein supplement for
trout production
2 years project
Foot Bath Copper Removal Systems
for Idaho Dairies
 Laboratory (Year 1)
 Pilot scale systems design
and construction
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Evaluation with varying
copper concentrations and
field collected wastewaters
Field Tests
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Electro-coagulation
Electrolysis
(Year 2)
Footbath system
Six month test
Economic Evaluation
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Installation cost
Operating cost
Hose-Drag Land Application:
A Water & Air Quality Evaluation
Broadcast
Sweep Injection
Aerway