Precisely controlled energy consumption for wastewater treatment plants

1. Greenbass ™
REGULATION OF SEQUENCED AERATION
FOR ACTIVATED SLUDGE
URBAN
WASTEWATER
PRECISELY CONTROLLED ENERGY
P-PPT-ER-010-EN-1107
CONSUMPTION FOR WASTEWATER
TREATMENT PLANTS

2. Urban
Wastewater
CONTENTS
Greenbass™
• Energy, a major issue in water treatment
• Greenbass™ Objectives
• Operating Principle
• Advantages of Greenbass™
• Some References
• Case Study: Tournus, FRANCE
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3. Urban
ENERGY, A MAJOR ISSUE IN
Wastewater WATER TREATMENT
Greenbass™ To fight against climate change:
• Reducing greenhouse gases
• Limiting the environmental impact
Controlling energy costs:
• Improving the energy balance of facilities
• Achieving energy self-sufficiency for some treatment plants
• Diversifying sources of energy
To meet stricter and stricter discharge standards:
• Better treatment quality but it can consume more energy
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4. Urban
Wastewater
OBJECTIVES of Greenbass™
Greenbass™
• Reducing energy consumption due to the aeration of
biological treatment basins:
– The elimination of excessive aeration peaks and energy waste.
– A reduction of 10 to 15% in energy consumption compared with
classic regulation systems (clock system on theoretical bases or
dissolved oxygen / redox sensors).
• Decreasing the operating costs of the water treatment plant
• Guaranteeing treatment quality comparable with existing
processes:
– An accurate, real time indication of the nitrate and ammonium
concentrations (main quality parameters of the treated water)
– Complete degradation of the nitrogenous components
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5. OPERATING PRINCIPLE (1/2)
Greenbass™ continuously adjusts the air flow provided to the tank as a
function of the needs.
The sensors immersed in the activated sludge directly and continuously
indicate the variation in the ammonium and nitrate concentrations.
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6. OPERATING PRINCIPLE (2/2)
The advanced regulation program
contains a patented algorithm which
constantly recalculates the useful
quantity of air as a function of the
biological activity. It controls the starting
and stopping sequences of the aeration
and regulates the flow of the blown air.
The blower – which can be equipped with
a regulator – diffuses fine air bubbles
which aerate the activated sludge and
nourish the bacteria responsible for the
nitrification.
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7. Urban
COMPARISON WITH TRADITIONAL
Wastewater
REGULATION SYSTEMS
Greenbass™
(-) Aeration regulated based on a redox potential or
the dissolved oxygen concentration is imperfect.
(-) Systems coupled to a clock are indirect and
partial.
(-) Redox potential sensors require weekly
maintenance.
(-) In small plants, due to a lack of maintenance, the
regulation often works in crippled mode.
(-) When the treatment is made reliable, this leads to
excess aeration
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8. Urban
Wastewater
Greenbass™ ADVANTAGES
Greenbass™
• UNIVERSAL: the product is adjustable to all sizes of
facilities, new or in operation.
• ADAPTABLE: Greenbass™ can be used with all air
systems and all types of automated regulation. The air
input can be with fixed or variable flow.
• UNIQUE: a patent was filed for the Greenbass™
algorithm.
• SIMPLE: the system offers simplicity of installation,
maintenance and upkeep.
• ECONOMICAL: Greenbass™ allows for optimization of the
cost reductions from the OPEX and CAPEX
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9. Urban
Wastewater
SOME REFERENCES
Greenbass™
NAME SIZE OF COMMISSIONING
OF SITE THE PLANT DATE
Dijon, France 400,000 PE 2010
Pau, France 190,000 PE 2011
Tournus, France 10,500 PE 2012
Saint Michel Chef Chef,
65,000 PE 2012
France
Camphin Phalempin,
7,700 PE 2012
France
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10. CASE STUDY:
TOURNUS, FRANCE
CONTEXT: DESIGN:
• Construction of a new water • Treatment line:
treatment plant with a capacity of – Standard pretreatment,
10,500 PE – Biological treatment (prolonged aeration
N-DN + physical-chemical
• Client: City of Tournus dephosphatation)
– Clarifier
• Commissioning: beginning of 2012
• Energy consumption: 700,000 Expected treatment level: Total N 15 mg/L
kWh/year including about 50 % for
the biological basin.
Specific features of the
project:
The City of Tournus, which was
seeing increasing energy
consumption at its current plant
dating from 1979, sought for
the future to receive
certification of controlled energy
consumption.
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11. CASE STUDY:
TOURNUS, FRANCE
4.5
15%
energy
tons
of CO2
savings avoided
per year
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