Dairy Waste Management Project

8/9/2019 Dairy Waste Management Project

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Dairy Waste ManagementDemonstration Project

Dr. John R. EllisBrazos River Authority

Linda BrookinsTexas Commission on Environmental Quality


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Dairy Waste ManagementDemonstration

• Combination Digester and Phosphorus RemovalSystem (likely the 1st of its kind in the nation)

• Goal is to remove 80% of the P in the wastestream

• Cooperative effort among numerous agencies

• $1.6 million grants and in-kind contributions

• Additional Revenue to Dairy

• A Model For Other Producers

• Dairy serving as a living laboratory for Presponse


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Too Much Manure…..Too Little Land

=

+


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North Bosque Watershed

• Large Dairy Industry

• 303(d) Listed

• PhosphorusImpairment

• TMDL andImplementation Plan

Meridian

Crawford


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TMDL Implementation• TMDL goal to decrease

SRP concentration by

avg of 50% at 5 indexsites

• Likely currently meetinggoal at lower 3 indexsites

• WWT plant atStephenville nearingcompletion of upgrade

• Preliminary evidence ofslight improvement atupper index site


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Major Activities

• Planning and

Cooperation• System Design

• Construction ofTreatment System

• CNMP Development

• Permitting

• Monitoring

• Economic Analysis

• Technology Transfer


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Broumley Dairy

Hico Texas


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Nutrient Management• Mass Balance

Problem (watershedand on-farm levels)

• CNMP (land

application,manure/wastewaterhandling, composting)

• Monitoring andEvaluation


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Parameters• Flow into Digester: 75,000 gpd from approx 980 cows• Expected Methane Prod: 32,000 cu ft/day• Total Biogas Prod: 47,000 cu ft/day• KW prod:

2400100high

192080avg

96040low

Kw/dayKwh/h


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Phosphorus Removal

80%39%2541PolishingPond

67%54%4189ModifiedOxidation

Ditch

28%28%89124Digester

Cumulative% Red.

% Red. ByStep

Effluent

(lbs/day)

Loading

(lbs/day)


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roumley Dairy P

Removal Project


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Current Status

• Construction Complete, Gas prod. Began in May• Open House this past June• Generator, Digester, and P Removal System all

Operational• Water Quality and Whole-Farm Monitoring Ongoing (2

additional years plus economic analysis already funded)

• Some Problems Encountered with Safety Equipment forGoing On-line with the Grid

• Will be Corrected Shortly• Small Amount of Addl DOE Funding being sought to aid

in determining Gas Production Efficiency• Additional Goal is to Determine Tradeoffs between Gas

Production and Phosphorus Removal Rates


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Waste to Energy

Projects

• At least 5 major firms closelyinvestigating the area for largescale projects

• Investments range from $10-$70million

• Include gasification, oxidation, anddigestion based technologies

• Products range from CO2,liquid/solid fertilizer, electricity,methane, distilled water, ethanol

• Status ranges from nearconstruction, to seeking venturecapital, to seeking cooperatingdairies

CoalTec Energy USA


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Documents

Dairy Waste Management Project