phosphorous reduction & manure management research in idaho mario e. de haro martí...
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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
4 N:24 P: 0 K
Portable Struvite Crystallizer Trailer mounted Continue collaboration with
WSU, CSU, Iowa State Evaluate various wastewater
Dairy Wastewater Potato Wastewater WW Sludge Effluent
Acidification Pre-Treatment
Struvite (MgNH4PO4*6 H2O)
ORGANIC Dairy Wastewater Phosphorus Removal Collaboration with
Colorado State University Chemical Process
Modification Acetic Acid vs Hydrochloric
Acid (pretreatment acidification) Potassium Hydroxide vs
Ammonia (reaction catalyst)
Crop Response Theoretical Solubility
Laboratory Greenhouse Trials
Wheat
Mg Solution
Mg Pum
p
NH3 InMg In
Inflow Ph Meter
System Flow Meter
Change in Crystal Properties
Non-acidified Struvite Acidified Struvite
Crystallization Results
Struvite Crystallization UI Experience Considerations
Experimental conditions 30% TP reduction under normal operation Up to 50% TP reduction under
acidification, increasing chemicals usage Operating cost to get 50% reduction
calculated to be >$2/cow/month New research needed to lower costs and
simplify operation 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 SeparationDeveloped by USDA-ARS Florence, SC
Lime (CaCO3) slurry (1 lime: 2 water)
CaPO4 Clarifier
Sludge Removal
Low P Effluent Overflow
12 ft
6 ft
9 ft
SuperSoils SystemB&B Farm, Clinton, NC
pH probe
pH controller
Lime pump
Lime mixing tank
Gravity overflow to clarifier“Dirty” water enters through center
Ultrasonic Level Sensor for process control
6 ft
12 ft
SeparatedParlor Water
SettlingOnly
1% LimeSlurry
5% Lime Slurry
2.5% Volume5% Volume10.2% Volume
0
2
4
6
8
10
12
Total Phosphorus
(ppm)
SeparatedLiquid
0.83%LimeSlurry
1.67%Limeslurry
2.50%LimeSlurry
3.33%LimeSlurry
4.17%LimeSlurry
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
6-mo. Pre and Post Digester Construction/Operation May – December, 2007 (Pre) April – December, 2008
(Post) West Point Dairy, Wendell UV Sentry Monitoring with
WindTrax Emissions Modeling
Fixed UV-DOAS position
Mobil UV-DOAS Wind direction during sample period
Summer
Spring, Fall Winter
Anaerobic digester
Late Summer(low velocity)
1 2
3
DEQ 10-m Weather Tower
Emissions Methodology Evaluation
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
Soldier Fly Larvae Utilize manure solids as
larval feed source When larvae are ready
to crystallize, they crawl out and away from manure (self-harvesting!!)
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 Electro-coagulation Electrolysis
Evaluation with varying copper concentrations and field collected wastewaters
Field Tests (Year 2) Footbath system Six month test
Economic Evaluation Installation cost Operating cost
Hose-Drag Land Application: A Water & Air Quality Evaluation
Broadcast
Aerway
Sweep Injection