Thermal Process Systems

Quality Biosolids Through Advanced Technologies

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.

ATAD

A = Autothermal

T = Thermophilic

A = Aerobic

D = Digestion

Autothermal

Self-heating – No external heat source

needed

Thickened material feed to the reactor

Thermophilic

Aerobic

Conditions in the reactor are kept aerobic

Anaerobic conditions can produce

mercaptans and other odorous

compounds

Digestion

Additional 10-15% solids destruction

in SNDR

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

Jet Aeration

• Varying Depths

• Continuous Operation

• Bottom of Tank Mixing

• Varying Liquid Flow

• Varying Air Flow

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.

SNDR

Storage

Nitrification

Denitrification

Reactor

Solids Conditioning

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

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 O2 Delivery to Uptake Demand

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

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 O2 Delivery to Uptake Demand

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%

2011 Corn Study

3 identical corn fields in Western

Minnesota

–ATAD Biosolids

–Commercial Fertilizer

–Cow Manure

103 day corn

Corn Study (cont)

Corn Field 1A

• 143.55 lbs/ac Biosolids N

Corn Field 1B

• 80 lbs/ac Fall Urea N

• 182.52 Solid Cow Manure Inc. N 262.52 Total

Corn Field 1C

• 80 lbs/ac Fall Urea N

• 60.84 lbs/ac Manure Surface Applied Winter

Corn Study (cont)

5.0 5.1 5.1 5.2 5.2 5.3 5.3 5.4 5.4 5.5 5.5

N (%)

1C-86

1C-421

1B-86

1B-421

1A-86

1A-421

Corn Study (cont)

Field Yield ATAD Biosolids 148 Bushels / Acre

Commercial Fertilizer 147 Bushels / Acre

Cow Manure 146 Bushels / Acre

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

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

Speedway, IN

Average Results Since Start-Up

NH4 in

filtrate

Cake Solids VSR

14 mg/L 21% 31.2%

Speedway, IN

Marshall, MN

Middletown, OH

Yorkville, IL

Maryville, TN

Maryville, TN

Waseca, MN

Brunswick County WWTP

Brunswick County, NC.

Grand Chute, WI