Road Cleaning
Domhorse Sweeping invests in continually upgrading our equipment to use modern sweeping and pollution control technology. Our company complies with the most stringent pollution control regulations, providing an efficient “24/7” service for all our clients.
Our company complies with
the most stringent pollution control regulations,
providing an efficient “24/7” service for all our
clients.
Our client municipalities are serviced by a
large fleet of regenerative air vacuum sweepers
and mechanical broom sweepers
which are compliant with SCAQMD rule
1186 (PM10 Compliance). By serving
communities using Compressed Natural
Gas powered sweepers that are
compliant with SCAQMD rule 1186.1.
Uses state-of-the-art mechanical
and regenerative air sweepers that
are certified to meet all State and
Federal EPA (Environmental Protection
Agency) and NPDES (National
Pollution Discharge Elimination
System) compliance mandates
In order to reduce road dust
emission either preventive or
mitigating strategies can be
adopted. Preventive strategies
aim to avoid dust deposition in
the first place, such as paving
the access to unpaved lots,
covering truck loads, or road
traffic restrictions. Mitigating
measures attempt instead to
remove or bind those particles
already deposited. Road sweeping
and washing (separately or
combined) on reducing emissions
and PM concentrations in ambient
air.
Street sweeping, either manual or
mechanical, has been a normal operation
for most municipalities for hundred of
years with aesthetic and sanitation purposes.
Street sweeper types fall into three
main categories: mechanical broom, vacuumassisted
broom and regenerative-air units.
Vacuum-assisted broom and regenerative-air
sweepers are generally better than mechanical
sweepers at removing finer sediments, while mechanical
sweepers are better at removing large debris
Street washing has been considered by several studies as a
method to able to reduce the mobility of dust load deposited on
street surfaces and therefore being a potential effective measure for
abating dust resuspension, street washing normally uses pressurized (nondrinking)
water. Water flushing can be integrated in a street sweeper or manually
applied by means of hoses. Water flushing can be expected to reduce particle resuspension
by transport particles into the curb or by simply increasing their aggregation while
the road surface is still wet.
Focus
important distinction must be made between efficiency in reducing emissions
(either by binding or removing particles from road) and reducing ambient air PM
concentrations in the vicinity of the road. It is noteworthy that observing a reduction
in emission (dust loading, mobility of dust, emission factor, potential or
strength) does not imply that a reduction in ambient PM levels is also observed.
Meteorology and other sources contribute largely to the PM
concentrations and their variability measured at the receptor.
Therefore it is
important remark that, observing no reduction in PM levels does not mean
that emissions have not been reduced, mostly if the share of abated emssions
is little compared to total emission impacting the receptor. Several
methodologies can be applied to favour the “detection” of PM abatement
such as: * Concurrent PM measurements at control sites; * Studying only
the local contribution to Pm10; * Conducting tests in environments where
resuspension is an important source; * Normalizing PM concentrations
by Nox, Black carbon or other tracers of motor exhaust emissions; *
Chemical characterization of PM samples; * High time resolved
measurements.
However, most studies focused only on one type of effectiveness
, either on the emission rate or on the ambient air PM
concentrations. Efficiency in emission reduction can be
expressed as the fraction, with respect to the precleaning
conditions of: * Dust load mass (total or micrometric
fraction) * Dust load mobility (total or micrometric
fraction) * Emission fraction * Emission potential
(or strength)
Domhorse Road Cleaners
gallery
