Drastically reduce energy costs using the heat value of sludge

1. Thermylis™ 2S
2-STAGE SLUDGE INCINERATION PROCESS
BIOSOLIDS
DRASTICALLY REDUCE ENERGY COSTS
P-PPT-B-011-EN-1107
USING THE HEAT VALUE OF SLUDGE

2. BIOSOLIDS
BIOSOLIDES
CONTENTS
Thermylis™
2S • The stakes of incineration
• The Thermylis™ 2S process
• Key points of the process
• Functional principle
• Advantages of the Thermylis™ 2S
• References of the Thermylis™ 2S
• Case study: Kielce, POLAND
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3. BIOSOLIDS
BIOSOLIDES
THE STAKES OF INCINERATION
Thermylis™
2S
Considerably reduces the quantity of sludge to be disposed,
Eliminates nuisances (odors, storage) and health risks,
Avoids propagation of pollutants (including endocrine disruptors) contained
in urban wastewater,
Completely eliminates the problem of sludge
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4. BIOSOLIDS
BIOSOLIDES
THE Thermylis 2S PROCESS
Thermylis™
2S
2 S («2 Stages») = 2 steps: drying + incineration
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=> Based on the principle of energy recovery
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5. BIOSOLIDS
BIOSOLIDES
KEY POINTS OF THE PROCESS
Thermylis™
2S FIELD OF APPLICATION:
The Thermylis™ 2S is perfectly adapted to sludge with
low volatile matter content (<60%) and low
calorific value.
For this reason, it is suitable for both urban and
industrial wastewater sludge:
- Digested sludge,
- Tertiary sludge
- All weakly dehydrated sludge
MAXIMUM DRYNESS:
•The dryness of dehydrated sludge to be incinerated
must be between 17 and 25% dry matter.
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6. FUNCTIONAL PRINCIPLE:
THE STAGES
1 Pre-dryer
Eliminates the quantity of water in the
sludge before incineration 2
2 Fluidized sand bed incinerator
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The incineration is done at 850°C 3
continuously for optimal elimination of
organic matter and endocrine substances
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3 Smoke cooled to be treated
The energy is recovered to supply the pre-
dryer for a reduced overall energy balance.
4 Exchanger
Recovers the energy in the smoke to heat
the pre-dryer
=> 0 fuel addition required
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7. BIOSOLIDS
BIOSOLIDES
ADVANTAGES OF THE Thermylis 2S
Thermylis™
2S
SAVINGS:
• Nearly-zero fuel consumption (fuel, gas) due to use of the
energy produced by the combustion,
• Sludge volume reduction reduces transport and landfill costs.
ENVIRONMENT:
• Very low environmental impact,
• Near-zero primary energy consumption,
• Reduction of CO2 emissions ,
• Complete elimination of pathogens, germs and hormonal
molecules strengthening community health and safety.
HIGH PERFORMANCE:
• Ultimate sludge volume reduction (between 7-10% of the
volume of the dehydrated sludge),
• Maximum combustion yield,
• Automatic, non-stop operation(24/7).
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8. Thermylis2S REFERENCES
Commissioni Type Dryness of sludge
Project Capacity ng date of sludge entering unit
Digested sludge
Valenton (94), France 1,200,000 PE 2011 Dried sludge fines
28%
Kielce, Poland 300,000 PE 2011 Digested sludge 20%
Gdansk, Poland 800,000 PE 2011 Digested sludge 22%
Mixed sludge
Shenzhen, China 3,000,000 PE 2013 Biological sludge
20%
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9. CASE STUDY:
KIELCE, POLAND
CONTEXT: DESIGN:
• Construction of a WWTP of 300,000 PE • Sludge treatment line:
Digestion, dehydration by centrifuge,
• Client: Wodociagi kieleckie incineration
• Commissioning of the plant: mid-2011
• Dryness of the sludge entering the
SITUATION: incineration unit: 20%
The client needed to bring the plant up to current code
compliance and thus overhauled the entire digestion • Capacity of the Thermylis™ 2S:
step to increase its capacity. Furthermore, as sludge 740 kg dry matter/day
spreading is a subject of debate in Europe, the client
seized the opportunity to include a sludge incineration • 3.2 T of sludge/h to be treated
unit with the digestion. leaving the dehydration
DEGREMONT provides this incineration unit in a
consortium with WTE.
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