Today, the issue of air quality management holds significant importance. Air pollution causes the emergence of new diseases and affects all aspects of the environment.
In California the main problem is heavy-duty diesel trucks that now become a major source of NOx air pollution (nitrogen dioxide and nitric oxide). NOx leads to acid rain and creates smog by reacting with volatile organic compounds in the atmosphere. For example, today two Indian cities – Delhi and Kolkata reached a severe level of air quality, which is why they suffer from smog and attempt to reduce vehicle and industry emissions urgently.
The government of California, in turn, develops new air pollution control regulations to reduce the level of air pollutants from diesel trucks. Scrubbing systems on board a truck is the only solution for the air treatment. Every truck manufactured post-2010 is required to have a system for emissions reduction to address NOx issues.
Even though in most states of the USA it is not obligatory to retrofit or retire older engines that can operate for up to 25 years, in California air pollution control regulations are stricter. By 2023, all heavy-duty diesel trucks must be equipped by a NOx-scrubbing system.
According to provisional data obtained from researchers at the University of California, truck engines built from 2010 or later emit 76 to 86% less NOx than older trucks that do not have any air scrubbing system. Consequently, heavy-duty diesel trucks are producing fewer contaminants that provoke the appearance of acid rain and smog.
These air scrubbers for trucks have one disadvantage. The researchers consider that diesel trucks fitted with the system emit nitrous oxide and ammonia that can’t be regulated but they cause problems with water quality. All the trucks don’t exceed the limits established by the state government.
It remains unclear why these contaminants are present. The operation of scrubbing systems is based on pumping a stream of urea into hot exhaust that then degrades into ammonia, which reduces the level of NOx emissions. Other reasons may be the following:
- more ammonia production than is needed for NOx reduction;
- not efficient catalysts in the system resulting in incomplete NOx reduction;
- incomplete cooperation of the NOx scrubber and other systems.
The extent of these emissions is not significant, but it could have important effects.. Also, it takes time for the scrubbers to be improved for more aggressive air pollution regulation.
If you are looking for the best air treatment device to improve air quality, Redwood Technology offers a cutting-edge type of wet scrubber – a Multi-Vortex wet air scrubber.
Redwood technology is a fast-growing vendor of wet air scrubbers. The multi-vortex scrubber can remove gas emissions, dust, vapors, and other pollutants from a gas stream. It is an innovative technology created to save water that makes it more cost-efficient and differs from other types of scrubbers. If you have any questions or would like to purchase a multi-vortex wet air scrubber, please contact us at info@rdwd.tech
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