Spray to help cut down dust
Shanghai Daily news
Local authorities plan to promote a water spray device at construction sites
next year to reduce dust discharge, the Shanghai Environmental Protection Bureau
The device, similar to a shower spray in bath houses, wets
the land and prevents a "sand storm" in strong winds.
"Dust discharge is a
big pollutant in the air and its reduction is key to improving air quality,"
said Wang Yu, vice chief of the bureau's pollution control division.
last December, four downtown districts - Xuhui and Jing'an among them - have
spent 35 million yuan (US$4.2 million) in trying various measures to establish
showcase areas for controlling dust discharge. Water spraying has proved to be
one of the most effective measures so far.
The water sprayers will be
installed about five meters above ground. The pressure will be two to three
times that of ordinary sprayers used in homes.
They will not only wet the
land and piles of sand, but also clean vehicles coming in and out of
A set of such sprayers costs more than 1,000 yuan
(US$120). It will be more expensive with a computer monitoring
Environment authorities will conduct regular checks on dust
discharge. The bureau will also increase the cleaning frequency of watering
carts on some key roads where many trucks pass.
Xuhui District's sanitation
bureau spent 4 million yuan buying nine high-pressure tank cars to wash dirty
The four districts that have tried various measures to control dust
discharge, have cut their dust discharge by nearly 50 percent in the past year.