The document describes Digelis Turbo, a process for enhanced digestion of biological or mixed sludge that uses thermal hydrolysis. Thermal hydrolysis disintegrates bacterial cells and exopolymers, making the sludge more easily digestible. This boosts digestion and reduces sludge volumes by 50% compared to conventional mesophilic digestion. Digelis Turbo increases biogas production which can be used to generate renewable energy and heat needed for the thermal hydrolysis process.

1. Digelis™
Turbo BIOSOLIDS
ENHANCED DIGESTION OF BIOLOGICAL OR
MIXED SLUDGE
REDUCE THE VOLUME OF THE SLUDGE
BY 50% WITH BOOSTING DIGESTION
P-PPT-007-EN-1107

2. BIOSOLIDS
BIOSOLIDES
CONTENTS
Digelis™ Degrémont Digestion Line
Turbo
Digelis™ Turbo Workshop
Digelis™ Turbo and Post-treatments
General Sludge Anaerobic Digestion
Biological Sludge
Functioning of the Digestion Stage
The Specificity of Digelis™ Turbo: Thermal Hydrolysis
Cambi Partnership and its References
Digelis™ Turbo Main Advantages
The first Project: Mapocho, CHILE
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3. BIOSOLIDS
BIOSOLIDES
DEGRÉMONT DIGESTION LINE
Digelis™
Turbo
Digelis™ RANGE
DIGESTION TYPE PRODUCT NAME DESCRIPTION
Conventional digestion Digelis Mesophilic digestion 37°C
Conventional digestion Digelis Smart Mesophilic digestion 37°C
+ integrated biogas storage
Enhanced digestion Digelis Thermo Thermophilic digestion 55°C
Mesophilic digestion 37°C
Enhanced digestion Digelis Duo + Thermophilic digestion 55°C
Boosted digestion Digelis Turbo Thermal Hydrolysis
+ Mesophilic digestion 37°C
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4. Digelis™ Turbo WORKSHOP
Digelis™ Turbo
Steam
Liquid + Gas Boiler
Water
Gas condensation
Sludge
cooling Biogas
Water uses
Pre-dewatering
Sludge and sludge Pulper HT reactor Flash tank
storage Biogas
Biogas
Digestion storage
Water
By pass
Thermal Hydolysis (THP)
Post
Sludge disposal
dewatering
Centrates
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5. Digelis Turbo AND POST-TREATMENTS
BIOGAS FROM
DIGESTION
Cogeneration RENEWABLE ENERGY
Energy recovery
50% increase in the production of biogas which
can be converted into electricity and heat
With the Digelis™ Turbo process, the efficiency of
volatile solids elimination can be improved by 50%
and the production of biogas increased proportionally
to the elimination of volatile solids.
Usable
product
Mineral recovery Energy recovery Organic matter recovery
Incineration Drying Storage
Autogenous combustible sludge Dried sludge High stabilisation and sanitation
Avoid the input of fossil 50% reduction in the mass of 30% dryness and very
fuel energy for sludge after dewatering good heap ability
combustion
Digelis™ Turbo increases Digelis™ Turbo reduces the investment The thermal hydrolysis step in
dewatering performance to up to and operating costs on the downstream the Digelis™ Turbo process
30 to 40% dryness technologies, particularly in the case of sanitizes the sludge and improves
thermal drying its dewatering capability
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6. GENERAL SLUDGE ANAEROBIC DIGESTION
Operating conditions
Temperature 35 - 37 °C
Retention time 16 - 22 days
Load 1,8 - 2,2 kg VS / m3/d
pH 7 - 7,5
VFA / Alkalinity < 0,15
Generally obtained results :
VS removal :
25-35 % Extended aeration sludge
40-55% Mixed sludge
Biogas production :
from 0,9 to 1,1 Nm3 / kg VS removal
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7. BIOSOLIDS
BIOSOLIDES
BIOLOGICAL SLUDGE
Digelis™
Turbo
• Biological sludge is composed of various fractions and contains a
high proportion of dead bacterial cells that took part in the
purification
• These cells are agglomerated in the form of biological floc; the
cohesion of this floc is due to the action of exopolymers
• The cellular content is thus doubly protected from the action of
the digestion for classic mesophilic retention times on the order
of 20 days:
Biological sludge microfloc
Cell Colon
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8. ACTION OF THERMAL HYDROLYSIS
BIOSOLIDS
BIOSOLIDES
ON BIOLOGICAL SLUDGE
Digelis™
Turbo Various companies have been seeking solutions to
attack this double protection to allow access to the
intra-cellular contents for digestion
• These solutions all involve pre-treatment of the
sludge, before it is admitted for digestion, which
destroys the flocs and the cell walls, leading to the
lysis of the cellular content of the bacteria
• Digelis™ Turbo includes a thermal pre-treatment
that hydrolyzes the sludge and accelerates its
degradation in the downstream digester
Disintegration of a colony
of bacteria due to stress
–x200 enlargement
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9. FUNCTIONING OF THE DIGESTION
BIOSOLIDS
BIOSOLIDES
STAGE
Digelis™
Turbo
Parameters Digelis Turbo Digelis (37°C)
Retention time 20 days 20 days
Volume of the digester 0.5 1
DS Concentration 9 – 12% 4 – 6%
VS Load >5 kg/m3/day 1.8 – 2.2 kg/m3/day
pH 7.5-8 7 - 7.5
Foaming None Possible presence of Nocardia, Microthrix
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10. THE SPECIFICITY OF Digelis Turbo:
THERMAL HYDROLYSIS PROCESS
Thermal hydrolysis disintegrates the cellular structure of bacteria
and solubilizes exopolymers to yield an easily digestible product.
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11. CAMBI, A PARTNER WITH MORE
THAN 10 YEARS OF EXPERIENCE
D esign capacity TH P
C ustom er/project Location T YPE C om pleted
(T D S/year) reactors
H IAS (1) Ham ar Norway 3 600 tonnes 1 W W TP 1996
T ham es W ater (2) C hertsey UK 9 600 tonnes 2 W W TP 1999
Borregaard Industries Sarspborg Norway 4 000 tonnes 1 PAPER 2000
T he M unicipality of Næ stved* N æ stved Denm ark 1 600 tonnes 1 W W TP* 2000
N igg Bay Aberdeen UK 16 500 tonnes 4 W W TP 2001
"M jøsanlegget", Biowaste Plant Lilleham m er Norway 4 600 tonnes 2 O FM SW 2001
R ingsend Sewage T reatm ent W orks Dublin Ireland 36 000 tonnes 8 W W TP 2002
T he M unicipality of Fredericia Fredericia Denm ark 8 000 tonnes 2 W W TP 2002
Kobelco Eco-Solutions Niigata Japan 1 200 tonnes 1 W W TP 2002
Spolka W odna Kapusciska Bydgoszcz Poland 8 000 tonnes 2 W W TP 2005
T ham es W ater C hertsey UK Included in (2) 0 O perations 2005 - 2012
H IAS, therm ophilic digester Ham ar Norway Included in (1) 0 New digester 2005
O xley Creek Brisbane Australia 12 900 tonnes 3 W W TP 2007
Bruxelles Nord Bruxelles Belgium 20 000 tonnes 5 W W TP 2007
Am perverband, C am bi TH P-C* G eiselbullach G erm any 2 000 tonnes 1 W W TP 2007
H IAS-Upgrade Ham ar Norway 3 600 tonnes 1 W W TP 2007
C otton Valley (Anglian W ater) M ilton Keynes UK 20 000 tonnes 4 W W TP 2008
Ecopro, m ulti-waste** plant Verdal Norway 8 000 tonnes 2 O FM SW ** 2008
W hitlingham W W TW (Anglian W ater) N orwich UK 19 000 tonnes 4 W W TP 2008
N igg Bay, upgrade Aberdeen UK 4 000 tonnes 0 W W TP 2008
Biovakka O y Åbo/T urku Finland 14 000 tonnes 3 W W TP 2008
O rdered Plants / U nder design/construction
Bran Sands (Aker-Kvæ rner/N W L) T ees Valley UK 37 000 tonnes 8 W W TP 2009
Jum eirah G olf Estates / Degrem ont D ubai UAE 25 000 tonnes 6 W W TP 2009
Vilniaus Vandenys/ Vilnius W ater Co. Vilnius Lithuania 23 000 tonnes 5 W W TP 2009
R ingsend ST W (N ew T HP line, Dublin Ireland 20 000 tonnes 4 W W TP 2010
TD S = Total dry solids (1000 kg = 1 tonne) T otal: 301 600 tonnes 70
W W TP = sludge from m uncipal wastewater treatm ent plant, *biological sludge/W A S only (N æ stved is extended aeration plant)
PA P ER = bio-sludge/waste activated sludge from paper factory wastewater treatm ent plant
O FM S W = O rganic Fraction of M unicipal Solid W aste, **m ix of sludge, O FM S W , and anim al by-products (wet: 30,000 - 40,000 t/y)
(*) organic fraction of municipal solid waste
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12. SOME REFERENCES OF OUR PARTNER CAMBI
KAPUSCISKA, POLAND
• Year: 2005
• Capacity: 8 000 TDS/year
• Number of reactors: 2
• Sludge disposal: agriculture
CHERSTEY, GREAT BRITAIN
• Year: 1999
• Capacity: 9,600 TDS/year
• Number of reactors: 2
• Sludge disposal: agriculture
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13. SOME REFERENCES OF OUR PARTNER CAMBI
BRISBANE (OXLEY CREEK),
AUSTRALIA
• Year: 2007
• Capacity: 12,900 TDS/year
• Number of reactors: 3
• Sludge disposal: agriculture
MILTON KEYNES (COTTON VALLEY),
GREAT BRITAIN
• Year: 2007
• Capacity: 17,000 TDS/year
• Number of reactors: 4
• Sludge disposal: agriculture
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14. BIOSOLIDS
BIOSOLIDES
Digelis Turbo MAIN ADVANTAGES (1/2)
Digelis™
Turbo Digelis™ Turbo:
REDUCES THE CAPACITY NEEDED FOR THE DOUBLES THE CAPACITY OF DIGESTERS
FINAL DRYING STEP
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15. BIOSOLIDS
BIOSOLIDES
Digelis Turbo MAIN ADVANTAGES (2/2)
Digelis™ Digelis™ Turbo:
:
Turbo
REDUCES THE COST OF INCREASES THE PRODUTION OF
SLUDGE REMOVAL USABLE BIOGAS
Biological sludge
without Digelis
Turbo 24% DS Biological
sludge with
100 T/d Digelis Turbo
30% DS
50 T/d
Production of dewatered sludge dehydrated
for 400 000 PE in wet tons per day
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16. SOME Digelis Turbo REFERENCES
Installation Country Capacity Start-up Date Use of Biogas
Mapocho Chile 3,500,000 PE 2012 Electricity
(cf. the following slides)
Arona Adeje
Spain 420,000 PE 2013 Electricity
(Canary Islands)
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17. THE FIRST Digelis Turbo PROJECT:
MAPOCHO (Santiago), CHILE (1/2)
CONTRACT:
• A wastewater treatment plant
• 8.8 m3/s (760,000 m3/day or 3.5 million p.e.)
• A DB contract which will be run by a
subsidiary of the Suez Environnement Group
(Aguas Andinas)
THE SLUDGE LINE:
• Digestion is used to stabilize the sludge before
it is dewatered and reused in agriculture
• Biological sludge is treated using the Digelis™
Turbo which produces an increased amount of
biogas.
• The biogas produced is used for cogeneration
which produces both heat (used to meet
Digelis™ Turbo requirements) and electricity.
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18. THE FIRST Digelis Turbo PROJECT:
MAPOCHO (Santiago), CHILE (2/2)
The study has revealed a major plus with regard
to the sustainable development of the Digelis
Turbo solution combined with cogeneration involving
biological sludge
SOLUTION WITHOUT SOLUTION WITH Difference
Digelis Turbo
Digelis Turbo Digelis Turbo Classic digestion
T DS per year Biological Sludge 49,580 49,580 0
Amount of biological sludge
131,500 97,400 - 26%
dewatered expressed as m3/year
Associated production of
electrical power expressed as 37 43 + 10%
GWh/year
Annual emission of CO2 avoided 4,600 tonnes
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19. BIOSOLIDS
BIOSOLIDES
Digelis Turbo : IN A FEW POINTS
Digelis™
Turbo • An opportunity for reduction of fossil energy
consumption inside the plant
- Enhance the production of green energy with biogas
• An opportunity to make reliable downstream
sludge disposal/treatment line
- Strong / High stabilization and sanitization of sludge
- Solid matter reduction
• An opportunity for optimization of the plant
design
- Increasing of digesters capacity
- Reduction of equipment size on the downstream
technologies (thermal drying, …)
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