2016 Responsibility report

Responsibility at Finavia A part of society Safety Staff wellbeing Environmental responsibility GRI
De-icing agents
Airports record their de-icing activities and chemical volumes in
their electronic maintenance journals, from which the Environmental
Unit acquires information for reporting. For Helsinki Airport,
Airport Maintenance reports the monthly volumes of chemicals
used and sends them to the Environmental Unit. The Traffic
Area Services Unit checks the correctness of information.
The consumption of de-icing agents is presented in the Annual
Report as 100 per cent concentration, obtained by deducting the
50 per cent proportion of water from the quantities of liquid agents
used. The oxygen consumption load caused by the de-icing agents
is calculated by using the biological oxygen demand (BOD7) factor
of each product. The exception to this is urea, where the calculation
factor used is its theoretical oxygen demand (ThOD) due
to the fact that its decomposition process differs from the other
agents. The factors used are shown in the table below.
BOD7 mg/g
Acetate solution 300
Granular acetate 670
Liquid formiate 90
Granular formiate 170
Liquid betaine (Betafrost) 720
Solid betaine 1,440
Urea (ThOD) 2,100
Of the de-icing agents, urea and betaine cause nitrogen loading.
A factor of 0.466g/g was used to calculate the nitrogen loading of
urea, while a factor of 0.06g/g and solid betaine 0,12g/g were used
to calculate the nitrogen loading of liquid betaine (Betafrost).
De-icing and anti-icing agents for aircraft
The ground handling companies performing de-icing and anti-icing
treatments on aircrafts keep a record of the treatments and
the quantities of liquid used (types I and IV). Each month, the
ground handling companies submit the daily data on liquid usage
quantities and number of treatments to the Environmental Unit
and to the invoicing units of those airports, where the recovery of
glycol has been arranged. For other airports, the ground handling
companies provide the Environmental Unit with monthly details of
the quantities of different types of liquids used.
In the Environmental Report, the annual usage quantities are
presented as 100 per cent propylene glycol, obtained by deducting
the proportion of water from the quantities used. The proportion
of water is 20 per cent in type I liquid and 50 per cent in type
IV liquid.
Aircraft emissions
Aircraft emissions are calculated using the LTO (Landing and
Take-Off) cycle, an international standard. The emissions are calculated
for flight altitudes below 915 metres (3,000 ft.), taking into
account the different aircraft and engine types. The calculation
includes emissions caused by take-off and landing up to 3,000
feet and the associated taxiing. Each emission component has its
own factor, obtained from the Emissions and Dispersion Modeling
System (EDMS) database developed and maintained by the US
aviation authority. Finavia has its own software for calculating the
LTO cycle.
Emissions from Finavia’s ground vehicles
The factors for different emissions components are obtained
from the Lipasto system maintained by VTT. The calculation is
based on fuel consumption and takes into account the characteristics
of different vehicles.
Finavia’s total emissions (CO 2)
The emissions for electricity and heating were calculated from the
total consumption using airport-specific factors obtained from
different sources. Heating energy is produced in different ways at
different airports (pellets, district heating, etc.), and the factor for
electricity varies annually with the production of electricity. The
total emissions figure includes all Finavia’s emissions for electricity,
heating and ground vehicles.
Consumption of electricity, heating energy and water
The airports read the electricity, heating energy and water metres
each month and enter the readings into Granlund Manager.
Finavia’s Facility Services and Energy Unit checks the correctness
of this information. The Environmental Unit obtains this information
from the Facility Serivces and Energy Unit for environmental
reporting.
The consumption figures per passenger are calculated by dividing
the total consumption by the annual number of passengers.
The consumption figures for Halli, Utti and Helsinki-Malmi Airports
are deducted before this calculation, because they do not have
any actual passenger traffic.
Waste
The airports obtain the information about their annual accumulation
of waste from the annual reports and invoices of the waste
management companies. The airports enter the data into the
Finavia’s Environmental Information system, from where the Environmental
Unit obtains it for environmental reporting.
In the report, the accumulated waste quantities are divided into
mixed waste, recyclable waste and hazardous waste. Recyclable
waste includes separately collected biowaste, metal, glass, recycled
paper and cardboard, lubricant waste, used tyres, WEEE, as well as
sorted construction waste and mixed waste sent for incineration.
Responsibility report 2016 67