Upload
chetan-patel
View
226
Download
0
Embed Size (px)
Citation preview
8/9/2019 Dairy Waste Management Project
1/29
Dairy Waste ManagementDemonstration Project
Dr. John R. EllisBrazos River Authority
Linda BrookinsTexas Commission on Environmental Quality
8/9/2019 Dairy Waste Management Project
2/29
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
8/9/2019 Dairy Waste Management Project
3/29
Too Much Manure…..Too Little Land
=
+
8/9/2019 Dairy Waste Management Project
4/29
North Bosque Watershed
• Large Dairy Industry
• 303(d) Listed
• PhosphorusImpairment
• TMDL andImplementation Plan
Meridian
Crawford
8/9/2019 Dairy Waste Management Project
5/29
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
8/9/2019 Dairy Waste Management Project
6/29
Major Activities
• Planning and
Cooperation• System Design
• Construction ofTreatment System
• CNMP Development
• Permitting
• Monitoring
• Economic Analysis
• Technology Transfer
8/9/2019 Dairy Waste Management Project
7/29
8/9/2019 Dairy Waste Management Project
8/29
Broumley Dairy
Hico Texas
8/9/2019 Dairy Waste Management Project
9/29
Nutrient Management• Mass Balance
Problem (watershedand on-farm levels)
• CNMP (land
application,manure/wastewaterhandling, composting)
• Monitoring andEvaluation
8/9/2019 Dairy Waste Management Project
10/29
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
8/9/2019 Dairy Waste Management Project
11/29
Phosphorus Removal
80%39%2541PolishingPond
67%54%4189ModifiedOxidation
Ditch
28%28%89124Digester
Cumulative% Red.
% Red. ByStep
Effluent
(lbs/day)
Loading
(lbs/day)
8/9/2019 Dairy Waste Management Project
12/29
8/9/2019 Dairy Waste Management Project
13/29
8/9/2019 Dairy Waste Management Project
14/29
8/9/2019 Dairy Waste Management Project
15/29
8/9/2019 Dairy Waste Management Project
16/29
8/9/2019 Dairy Waste Management Project
17/29
8/9/2019 Dairy Waste Management Project
18/29
8/9/2019 Dairy Waste Management Project
19/29
8/9/2019 Dairy Waste Management Project
20/29
8/9/2019 Dairy Waste Management Project
21/29
8/9/2019 Dairy Waste Management Project
22/29
8/9/2019 Dairy Waste Management Project
23/29
8/9/2019 Dairy Waste Management Project
24/29
8/9/2019 Dairy Waste Management Project
25/29
roumley Dairy P
Removal Project
8/9/2019 Dairy Waste Management Project
26/29
8/9/2019 Dairy Waste Management Project
27/29
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
8/9/2019 Dairy Waste Management Project
28/29
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
8/9/2019 Dairy Waste Management Project
29/29