Emission factor and inventory for fugitive dust from concrete batching plants in Beijing

Literature information

Author：

HUANG Yu-hu1 HAN Kai-li1 CHEN Li-yuan2 QI Li-rong3 QU Song1 LI Bei-bei4 QIN Jian-ping1

Affiliations：

National Engineering Research Center of Urban Environmental Pollution Control, Beijing Municipal Research Institute of Environmental Protection, Beijing, China 100037;Beijing Municipal Environmental Protection Bureau, Beijing, China 100044;Beijing Product

Year：

2017

Keywords：

concrete batching plant; fugitive dust; emission factor; emission inventory;

Abstract：

In order to estimate the emission inventory for fugitive dust from concrete batching plants accurately, emission factors for fugitive dust from concrete batching plants in USEPA and SCAQMD were synthesized in this paper, and road silt loading test were carried out in typical concrete batching plants in Beijing, and the emission factors for fugitive dust of production segments and comprehensive process from concrete batching plants were established in Beijing. Combining with the fugitive dust managing process from concrete batching plants in Beijing, fugitive dust emission inventory from concrete batching plants in Beijing from 1991 to 2014 was estimated, and predicted for the year of 2015 to 2020. The results showed that the mean value of road silt loading of concrete batching plants was (26.2 ± 11.5) g/m2 in Beijing in 2015, which was 2.4 times as much as the value (11.0 g/m2) recommended by SCAQMD. The fugitive dust from concrete batching plants in Beijing before 1995 was uncontrolled, the comprehensive emission factor of PM2.5 was 86 g/m3 concrete, the uneven factor of monthly of production output of concrete batching plants in first quarter was 1/3 of other quarters. The comprehensive emission factor of PM2.5 in 2015 was declined 89.4% compared with 1995, and the proportion of road fugitive dust emission from plants in total emission was increased from 10% to 70%. After implementation of Beijing’s Clean Air Action Plan from 2013 to 2017, the PM2.5 emission from concrete batching plants fell to 543.1 t/a and decreased by 48.3% in 2015 compared with 2013. The contribution of elimination of unqualified concrete batching plants to PM2.5 emission reduction was 18.6%. The fugitive dust emission from concrete batching plants in Beijing was concentrated on the 5th ring road to 6th ring road (52%), and the emission amount of outside of 6th ring road accounted for 28% of total amount. In the future, eliminating unqualified concrete batching plants continuously and strengthening road sweep cleaning in plants should be the most important emission reduction efforts of concrete batching plants in Beijing.