Green Productivity Demonstration Project (GPDP) for Cement Project
Project location: The project implemented in two cement factory (Sai Son and Hoang Thach) in Vietnam
Project duration: 1 year (2000 – 2001)
Project donor: Asian Productivity Organization (APO)
Project objectives
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To introduce GP into the industrial sector.
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To improve environmental performance of the company.
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To increase productivity of the company.
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Setting up Environmental Management System (EMS) according to ISO 14001 standard.
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To increase awareness of employees in company.
Achievements
Dust reduction
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A water car was employed to spray water on the limestone before loading, unloading and on the surface of the road from the mine to the limestone crushers. Dust generated at this area has been reduced.
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118 bag filters in the company were maintenance and replaced damaged. A maintenance procedure for bag filters was established and applied in the company, now they operate efficiently and decrease dust released into environment.
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Replace the 280 kW/h motor with a 380 kW/h motor and expanded the diameter of suction pipe to 400mm. The cover at the head of suction pipe, which was made of rubber, was replaced by cotton material resulting in a reduction from (18 mg/m3 to 7.2mg/m 3) concentration in the area.
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Two-dust collection systems were installed to service the cement bag delivery conveyor belt to the ship, truck and train loading area. Much of the dust on the surface of the cement bags is now collected for reuse, which has saved money and also dust concentration in this area has been reduced. This system can collected 420 tons of cement dust per year and the pay back period only 10.2 months after operated.
Noise pollution
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Noise pollution prevention regulations was established and applied within company
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Training was provide to all relevant workers to enhancing their awareness of noise issues.
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An operation room was built in the compressor room for the packaging area as to separate the operator from compressor room and thus to reduce the impact of noise. The result presented noise 75 dB lower before 94 dB.
Water pollution
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An oil trap has been installed at the maintenance workshop to separate oil from wastewater
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All employees related to waste oil generation got appropriate training on how to manage waste oil, on using tools and equipment correctly during maintenance and how to discharge waste oil correctly.
Productivity improvement
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The company was mixed limestone with high SiO2 concentration lower SiO2 between difference mine to get adequate SiO2 concentration before feed in limestone crusher.
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A hammer is now used to make the limestone blocks smaller, about 30-40cm, so they meet the design requirements before they are fed into the limestone crusher.
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Presently the productivity of the limestone crusher increased by 5 % and lifetime of hammer is also longer.
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The lifting liner in planetary clinker cooler was modified. The exhaust and suction fans were changed and they now have the same capacity. However, it is not yet clear if these measures have been effective.
Others
An Environmental Management System (EMS) was established to meet ISO 14001 standards in the company and all solid waste are now managed under standard procedures.
VPC’s role (leader, partner) and level of involvement in the project
VPC is project leader of project. The main responsible of VPC is to coordinate with Department of Science, Technology and Environment (DOSTE), provide different training courses and workshop on GP options.
