Thermal Process Systems. Quality Biosolids Through Advanced Technologies

Transcription

1 Thermal Process Systems Quality Biosolids Through Advanced Technologies

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3 Class A How to get there? 503 Regulations for Class A Biosolids lists 6 Alternative Processes. #6 PFRP Process for Further Reduction of Pathogens. This list includes ATAD time under temperature for Pathogen Destruction.

4 ATAD A = Autothermal T = Thermophilic A = Aerobic D = Digestion

5 Autothermal Self-heating No external heat source needed Thickened material feed to the reactor

6 Thermophilic

7 Aerobic Conditions in the reactor are kept aerobic Anaerobic conditions can produce mercaptans and other odorous compounds

8 Additional 10-15% solids destruction in SNDR Digestion

9 End Product is KEY WWTP s Costs for Solids Disposal in the Top 3 Budget Lines ATAD Process Reduces Sludge Volume by 50% Produces a Product, Not a Waste. Class A Odor-free Stable

10 Jet Aeration Varying Depths Continuous Operation Bottom of Tank Mixing Varying Liquid Flow Varying Air Flow

11 ThermAer Process Parameters Mirror Image Independent research has proven that Oxygen Uptake Rate (OUR) and Oxidation Reduction Potential (ORP) are inversely proportional, making this relationship a highly reliable control variable.

12 SNDR Storage Nitrification Denitrification Reactor Solids Conditioning

13 SNDR solids conditioning Mesophilic Conditioning and ph Control allow for Nitrification and De-nitrification in a Single Tank Reduces Ammonia & Soluble COD Reduces Overall Dewatering Cost Valence electron ratio Cycle Blower On/Off to Control ph Satisfies any Residual Oxygen Demand

14 ATAD Process SAVES Money High Volume Reduction 55-70% VS Destruction - 50%+ TS Destruction Cut Hauling and End Use/Disposal Costs by 50% Improves Dewatering even on WAS Higher % Solids = Less Material to Manage Solids Range 25-33% Reduced Polymer Demand Reduced Manpower High Degree of Automation Cuts Operator Time Energy Efficient ORP Control Strategy System Matches O 2 Delivery to Uptake Demand

15 Applications Thickened Feed Solids > 3% Lower HRT / Smaller footprint Waste Activated Sludge (WAS) Primary Sludge Septage Dissolved Air Flotation (DAF) Any Biological Degradable High COD Material SBR MBR

16 ThermAer SAVES Money High Volume Reduction 55-70% VS Destruction - 50%+ TS Destruction Cut Hauling and End Use/Disposal Costs by 50% Improves Dewatering even on WAS Higher % Solids = Less Material to Manage Solids Range 25-33% Reduced Polymer Demand Reduced Manpower High Degree of Automation Cuts Operator Time Energy Efficient ORP Control Strategy System Matches O 2 Delivery to Uptake Demand

17 ATAD Biosolids = Product Not Waste High Quality Organic Fertilizer Class A Instant Product NO Further Processing Meets Industry Specs for Compost Stable and Mature = Low Odor Flexible - Long Term Storage or Instant Use TPS Total N = 4.5% Compost Total N = 2.5%

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19 2011 Corn Study 3 identical corn fields in Western Minnesota ATAD Biosolids Commercial Fertilizer Cow Manure 103 day corn

20 Corn Study (cont) Corn Field 1A lbs/ac Biosolids N Corn Field 1B 80 lbs/ac Fall Urea N Solid Cow Manure Inc. N Total Corn Field 1C 80 lbs/ac Fall Urea N lbs/ac Manure Surface Applied Winter

21 Corn Study (cont) N (%) 1C-86 1C-421 1B-86 1B-421 1A-86 1A

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25 Corn Study (cont) Field ATAD Biosolids Commercial Fertilizer Cow Manure Yield 148 Bushels / Acre 147 Bushels / Acre 146 Bushels / Acre

26 Biosolids Conditioning Can be applied to other digestive processes - assists with dewatering - controls ammonia recycle to the front of the plant - additional TS and VS destruction

27 SNDR following Anaerobic Exceptional ammonia nitrification and denitrification Additional VS and TS destruction Elimination of odors created in the anaerobic digestion process Conversion to an aerobic, more visually appealing solid end-product

28 Speedway, IN Average Results Since Start-Up NH 4 in filtrate Cake Solids VSR 14 mg/l 21% 31.2%

29 Speedway, IN

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32 Middletown, OH Marshall, MN

33 Yorkville, IL

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35 Maryville, TN

36 Maryville, TN

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38 Waseca, MN

39 Grand Chute, WI Brunswick County WWTP Brunswick County, NC.

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