At the beginning of 2022, the Stockholm Port Authority decided to investigate emissions from cruise ships docked at Stadsgården. The ships are not connected to the power grid during their stay of at least 24 hours and have to generate their own electricity via diesel generators on board. The compact measuring device for determining ambient air quality Fidas® Smart 100 from Palas GmbH has already been installed at the port of Stockholm, more to follow.
Cruise ships produce large quantities of air pollutants. But how great is the danger for people who live or work near harbors and ports? To answer this question, the City of Stockholm is using measuring devices from Palas® and will be carrying out measurements between May and September - with the option of an extension. Only with precise measurement data, invisible threats in the air can be made visible. And also they can be used to make reliable statements about the air quality on site and – if necessary – to take appropriate countermeasures.
The challenge now is to accurately record the tracks of the cruise ships, because factors such as weather, wind direction and the quantity or location of the ships naturally also play an important role here. The City of Stockholm has detailed schedules for all ships coming in and can use the measurement data to closely monitor and analyze the pollution in the air.
Fidas® Smart 100 continuously and reliably analyzes airborne particulate matter in the size range 0.175 - 20 μm and is released and approved by TÜV for PM2.5 for official measurements. Fidas® Smart 100 thus provides comprehensive and accurate information on fine dust particles, which is only possible in this form with a counting single particle measurement method.
The city of Stockholm and the port authority hope to get clear results from this measurement data to see how serious the air pollution is, that are made from cruise ship. This is the only way to make valid statements about possible effects on people and the environment. The measurement phase - and thus initial evaluations - are scheduled to run until September, with an option to extend.
Every year, there are approximately 300 ship arrivals in Stockholm with more than 500,000 passengers. There are a total of four cruise port terminals in Stockholm. The berth Stadsgården is located about 1 km south of the old town Gamla Stan and ideal for large cruise ships.
AQ Guard Smart , the latest Palas® air quality measurement system for monitoring fine particulate matter, received MCERTS approval as an Indicative Ambient Particulate Monitor on June 24, 2022. The measurement system with optional gas sensor technology was specially developed for demanding environmental conditions and is particularly suitable for smart city applications, fence line and construction site monitoring.
Whether for air quality measurements during the volcanic eruption on La Palma, for measurements of (fine) dust pollution on construction sites or at inner-city traffic junctions: The internationally recognized MCERTS certification confirms the AQ Guard Smart precise results in the measurement range (CN) up to 20,000 particles/cm³. The compact and cloud-enabled AQ Guard Smart thus establishes itself as one of the most reliable measurement systems for determining air quality (PM1, PM2.5, PM4, PM10, TSP).
the technology of the EN 16450-certified Fidas® 200, the AQ Guard Smart is an
optical scattered light aerosol spectrometer with single particle analysis. If
required, the system can be easily connected to the cloud-based environmental
measurement system MyAtmosphere . It allows both private and
government operators to directly retrieve current readings or compare them with
other instruments. The usual protocols such as ASCII, MODBUS via TCP or UDP are
MCERTS as a reliable reference
The MCERTS certification program is based on internationally recognized standards relating to ambient air monitoring and instrument approval. The certification includes both careful examination of the measuring device and field tests in comparison with the official reference measurement method. It ensures both the reliability of the measurement device and the reliability of the measured values.
For more than 25 years, the RBG system has been used worldwide with great success for the reliable dispersion of non-cohesive powders such as mineral dusts, active pharmaceutical ingredients, pollen, etc.
Learn more about our new devices in this webinar with our Division Manager Martin Schmidt.
MyAtmosphere is a cloud-based data platform for air quality. The proven Palas® fine dust measuring device AQ Guard Smart, which was developed for use on construction sites, enables the continuous recording, visualization and monitoring of fine dust pollution. Wind direction and speed can also be taken into account.
When limit values are reached, the construction site operator or the responsible authority automatically receives a notification or on-site visual signal, so that dust-reducing actions can be initiated or reinforced. Residents can also obtain information about air quality online.
Construction site operators, authorities and residents always have transparency about the current situation and the possibility to implement the best possible immission protection during construction.
Palas GmbH at TiefbauLIVE in Karlsruhe - Meet us from 5-7 May 2022 at booth H402.
The skies turned red and the dust was found everywhere (cars, tables, snow, etc.). While in Spain also the fine dust values PM2.5 and PM10 increased very strongly, the increase was more moderate in Germany. As a result of the rain, a large part of the Sahara dust was washed out as precipitation, so-called blood rain, therefore especially the coarse fractions did not remain very long in the aerosol state.
Sahara dust contains very coarse-grained parts, as the following electron microscope image shows (Fig 1).
Fig. 1: Electron microscope image of Sahara dust, shown in German Tagesthemen on 15.3.2022
The reddish coloration comes from the high iron oxide content. As can be seen in the picture, the size of the particles is in the range 1-10 µm.
This is also reflected in the measured size distributions on the AQ Guard monitors. Below is an example of three size distributions measured at the Karlsruhe (Fig 2 and Fig. 3).
Fig 2: AQ Guard at the Headquarters Palas Karlsruhe (Germany) with clear deposits
The blue curve shows a distribution shortly before the event. The green and red curves show size distributions at the time of the Sahara dust episode. They differ depending on the weather conditions. For example, in the case of simultaneous precipitation (green curve) the distribution is increased overall, but only in the range < 1µm. Coarser particles are washed out more by the rain and are therefore hardly elevated.
Fig. 3: Size distributions measured at the Karlsruhe site
The red curve shows a distribution typical for Saharan dust with increased fraction in the range 1-10 µm.
On the long journey from the Sahara through southern Europe to northern Europe, the Sahara dust and aerosol size distribution changes as a result of local weather conditions.
The size distributions across Europe can therefore differ locally, but are very well resolved by the size-resolved measurement with the aerosol spectrometers of the Fidas® 200 and AQ Guard fine dust systems.