Air Monitoring 19 Air Pressure and Relative Humidity Trends:


Observations revealed a downward trend in air pressure corresponding to methane values. This trend suggests a potential hindrance to gas escape in denser air. Similarly, relative humidity exhibited a weak downward trend, hinting at possible impediments to gas release due to higher humidity levels.


Conclusions


The case study provides insights into the complex interplay between methane emissions and meteorological variables at the Berlin wastewater facility. While some correlations were identifi ed, uncertainties and fl uctuations necessitate further research to refi ne models and better understand the factors infl uencing methane release. The fi ndings underscore the importance of considering multiple variables when assessing emissions from wastewater facilities for effective environmental management.


Next steps:


The study is still ongoing and in February we plan to expand our investigations to include two more sites equipped with methane sensors. We will use a triangulation method developed by the DEUS Scientifi c expert group to accurately measure and analyze methane emissions. In doing so, we aim to increase the accuracy of our results and gain a more comprehensive understanding of the dynamics of methane release from wastewater treatment plants.


Figure 4: a) Correlation between methane concentration and wind speed b) Correlation between methane concentration and air pressure


Author Contact Details Dr. Günter Becker, Marc Nodorft, Ehsan Tavakoli Project coordination: Marc Nodorft • Email: e.tavakoli@deus-cleangrid.org


Dr. Günter Becker Marc Nodrift Ehsan Tavakoli


Highly advanced air quality sensors make history at AIRLAB 2023


At the latest AIRLAB Microsensors Challenge, organised by AIRPARIF, Kunak’s revolutionary technology won the award as the most accurate sensors on the market. Kunak AIR Pro (for the second edition in a row) and Kunak AIR Lite (fi rst edition to participate) have been awarded the most accurate multi-pollutant sensors for France and Thailand.


The Airlab Challenge, organized by AIRPARIF, aims to assess and compare microsensors independently and provide users with information about the product’s suitability and potential applications. The challenge takes into account various criteria, such as accuracy, utility, usability, form factor, costs, etc. The challenge guarantees fair assessment by testing all devices under the same conditions and timeframes. However, because the IPI index is logarithmic, performance differences become more noticeable with higher values, leading to overall high scores for all results.


This award is further proof that Kunak technology is suitable for all environmental conditions showing the highest data quality in both locations. Kunak was declared the leader in terms of accuracy in all measured parameters, with a clear difference compared to all other competitors. One should note the initial results needed to be reevaluated because of some signifi cant errors in the fi rst analysis of the instrumentation data, which resulted in an inaccurate appraisal of the Kunak device.


Once these miscalculations were corrected, Kunak’s product range was recognised for its unparalleled accuracy. Kunak has reasserted its good data quality and performance, being the only multi- pollutant sensor manufacturer that has improved its results since Airlab Challenge 2021 Edition. The AIR Pro and AIR Lite O3 sensors were awarded as the best in France and Thailand, and the PM2.5 sensor for indoor.


Edurne Ibarrola, PhD, Chief Scientifi c Offi cer (CSO) of Kunak said, “Winning the award for the second year in a row for the most accurate multi-pollutant sensor is a testament to all the R&D efforts we have made in recent years, solving all the limitations of air quality sensors, in real time, and without the need for external data. At Kunak, we are committed to offering the best product on the market, and this award is proof that we are on the right track.”


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New gas analyser with enhanced functionality reaches new levels of speed and precision


Hiden Analytical Ltd has launched their new, next- generation QGA 2.0 Gas Analyser, which signifi cantly outperforms its predecessor with outstanding improvements in speed, precision, and functionality.


The rapid QGA 2.0 performs 1,000 measurements per second whilst providing superb accuracy, with less than 0.5% error at 1 ppm. The QGA 2.0 has been redesigned for enhanced functionality and easier servicing; it is compatible with all available inlets for versatile gas analysis. This highly advanced device features a simplifi ed start-up with a single button for pump down and software start. This is a compact and lightweight device, Hiden Analytical has also managed to reduce the instrument’s weight for easier portability and lower its footprint by 42% from its predecessor.


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