Technology Renovation for Environmental Improvement (07/02)
07/02/2012 - 20 Lượt xem
According to Vinacomin, the Group invests about VND700 billion every year (accounting for one percent of their revenues) on environmental protection operations. Its member companies also use environmental funds (0.5 percent of their revenues) for regular environmental protection operations.
In addition, the companies make regular reports on the impacts of their
operations on the environment, and carry out impact assessments.
Vinacomin members are improving specialized routes for coal
transportation instead of transporting them by road to minimize the impacts of noise and dust on residential areas. They are also carrying out a series of solutions
to improve environmental conditions such as upgrading drain systems in
Khe Cham - Duong Huy coal mines and environmental conditions around
Vang Danh River (Uong Bi town); using stratification measures and
growing Vetiver grass to stabilize the sides of dumping
grounds; building dikes to prevent soil and stones from filling streams
and rivers; and growing trees and leveling ground to restore
environmental conditions in mining areas.
One of Vinacomin's
priorities in their environmental protection operations is to treat
waste water. In 2010 alone, Vinacomin invested in 32 projects to build
waste water treatment stations which met the QCVN 24:2009/BTNMT
standards such as the station at Mao Khe Coal Mine with capacity of 1,200m3 per hour, the Coc Sau Station and the +41 Lo tri Station at Thong Nhat Coal Mine with capacity of 300m3 per hour.
Do Manh Dung, the deputy director of Vinacomin
Informatics, Technology, Environment joint stock company (VITE), which
is responsible for consultancy on the Group's waste water treatment
projects, said that the Group had applied modern technologies like
horizontal flow sedimentation tank and lamella sedimentation tank as
well as using physiochemical methods and pressured mechanical filters
so that after projects such as +41 Lo Tri, +131 Trang Khe, Khe Cham and
Coc Sau were carried out, waste water met standards to be released into
the environment.
Over
the recent years, VITE has always released solutions which were
environmentally, economically and socially effective to help investors
in their projects. The application of physiochemical
technologies to treat waste water was initially applied at the Ha Lam
Coal Mine in 2007 to replace the former simple and ineffective
sedimentation pond solution. So far, 29 waste water treatment stations
have been built, of which
23 stations have been put into operation. There have been great changes
in the waste water treatment technologies which are now more
progressive and modern, from horizontal flow sedimentation tank
technology to ramp sedimentation board technology to increase
sedimentation rates and limit the sedimentation tank area. In addition,
waste water treatment stations such as at Coc Sau, Cai Da, and Hoanh Bo
were more efficiently designed. Residual mud at the stations was
treated with more modern methods, which was filtered and pressed by
specialized equipment instead of using the former sedimentation tank.
To
minimize waste water treatment costs and to be more
environment-friendly, the waste water treatment technology by a
biological swamp was piloted in Dong Trieu District in 2009. It proved
its effectiveness in treating waste water of medium and large capacity. The advantage of this
method is low cost, environmentally-friendly chemical-free process but
it also requires large space to handle the operation.
In general, the major results achieved by Vinacomin in recent years were attributed to the courageous application of technical solutions and advanced and effective technologies. Dealing with environmental issues in the field of mineral
exploitation is a new task which requires specific technical solutions
and technologies. Consequently, technology renovation in Vietnam needs
a long-term and continuous process to ensure the sustainable development of the country's industrial sector./.
Source: VEN.
Source: VEN.
