It has become a national strategy to promote the integrated development of Yangtze River Delta, which covers three provinces and one city, namely Jiangsu, Zhejiang, Anhui and Shanghai. As a demonstration area of national development, the Yangtze River Delta has top capacity for environmental monitoring, and acts as an industrial leader in terms of the number and coverage of monitoring network, laboratory scale, quality human resources, social atmosphere monitoring institutions, regional cooperation mechanism and other aspects.
The preparation of Technical Specifications for Grid Monitoring of Volatile Organic Compounds in Industrial Parks (hereinafter referred to as “the Specifications”), led by Shanghai Environmental Monitoring Center and Shanghai Yangtze River Delta Air Quality Forecast Center, and assisted by Shanghai Textile Energy Conservation and Environmental Protection Center, was officially launched in September 2019.
Once approved and implemented, the Specifications will not only be applicable to the Yangtze River Delta demonstration area, but also provide a reference for subsequent national standards.
As major air pollutants, volatile organic compounds (VOCs) can seriously harm human health and are key precursors of PM2.5 and ozone. Therefore, VOC prevention and control is highly prioritized by the state. As components of key industrial governance tasks, the government requires industrial parks to identify characteristic pollutants, and to carry out grid monitoring and source analysis.
The characterization and source analysis of VOC emissions from industrial parks, which constitute main fixed anthropogenic sources, will offer strong technical support for pollution prevention and control. VOC emissions from industrial parks are often characterized by high intensity per unit area, high proportion of unorganized and irregular emissions, and so on. It is difficult to capture instantaneous and sudden emissions with conventional on-site manual sampling and analysis, which in turn results in unclear identification of pollution sources. Because it is costly to deploy fixed detectors capable of continuous automatic monitoring at particular sites, multiple fixed detection points cannot be established to identify VOC emission sources with precision, hampering the industrial parks’ ability to meet relevant requirements.
The industrial parks implement grid source investigation of VOCs by combining fixed point and mobile monitoring, while also taking meteorological parameters into consideration. In this way, they can identify sources of instantaneous and sudden pollution, and pinpoint locations with high values of pollutants, so as to meet requirements for source identification.
In order to develop practical, operational and effective specifications, it is essential to have detectors with advanced technology and stable performance. Crowcon, one of the operating companies of Halma, was invited by the Shanghai Municipal Environmental Monitoring Center and the Shanghai Yangtze River Delta Air Quality Forecast Center to help and prepare the Specifications.
Crowcon participated in the entire monitoring mission from September 2019 to the end of December 2021. Air quality data must be monitored in a variety of environments, ranging from the early-stage laboratory environment (i.e. the idealized case), outdoor non-industrial environment, fixed point monitoring in multiple industrial areas, to typical seasons in Shanghai, including the humid and hot plum rain season. It took 1-3 months to complete each fixed point monitoring.
The monitoring mission lasted more than two years. Due to the stable and reliable performance of the two Crowcon products, i.e., AMG-1000, an online monitoring system for toxic and harmful gases, and Vocs Gard, an online monitoring system for VOCs, as well as the ability to meet customer environmental data requirements with speed and accuracy, Crowcon was reserved till the final stage of data verification for the Specifications.
After the monitoring mission was completed in December 2021, Crowcon received a letter of appreciation from the Shanghai Environmental Monitoring Center, which affirmed not only Crowcon products, but also on-site service quality.
“We would like to thank Crowcon for your important contribution to the preparation of Technical Specifications for Grid Monitoring of Volatile Organic Compounds in Industrial Parks. Special thanks to Ren Chao and Li Mingyang for their hard work!” Shanghai Environmental Monitoring Center and Shanghai Yangtze River Delta Air Quality Forecast Center stated.
We are grateful to Shanghai Environmental Monitoring Center for its recognition of Crowcon. Stable product performance, technological innovation, quality on-site service and technical support constitute the cornerstone for Crowcon’s sustainable development, and also reflect the best practice of Halma purpose, “to grow a safer, cleaner, healthier future for everyone, every day.”