Sản xuất và tiêu dùng bền vững

Monday, 21/09/2026 | 22:58 GMT+7

Case study

Thanh Vinh Coconut Processing Factory

19/02/2012

Thanh Vinh Coconut Processing Factory was established in 2005 with total capacity from 4,000 to 6,000 tons/year. The factory specializes in desiccated coconut for domestic market and export. The total employees of the factory is 130.

Before applying cleaner production, the factory had to face the problem of wastewater pollution. The wastewater derived from the processing workshop had BOD5 content (615 mg/l), COD content(870 mg/l) much higher than Vietnamese Standards (2008). Air emission from rice husk boiler also polluted the surroundings. To solve these problem, the factory had supports from Cleaner Production Component in Industry of Ministry of Industry and Trade.

With the support from Ben tre Department of Industry and Trade, in 2008, the factory carried out the cleaner production assessment. The factory established the cleaner production team led by Mr.Cu Van Thanh – Director of the factory - and 9 other members to carry out the cleaner production assessment on the whole of production line.  The assessment of the production processes, the determination of waste streams, the balance of materials and energy were worked out. Then all data collected were used for analyzing to find out the cleaner production options for each production processes.

 After the assessment and the determination of improving solution options, the factory conducted some house keeping options which required low cost and no cost with the total investment of 123 million dong. After stage 1, the factory saved 189 million dong. At stage 2, the factory took the initiative in big investment solutions to thoroughly solve the environmental problems, viz. Replacing existing steam traps by Steam gards;  replacing steam boiler using husk by steam boiler using coconut shell; improving and upgrading workshops to satisfy the demand of the quality management system ISO 22.000: 2005; building wastewater treatment station.  The financial benefits brought in by these solutions was 1.3 billion per year as the material consumption and environmental pollution were reduced.

The benefits brought in to the factory from cleaner production were detailed in the following:

Technical benefitEconomic benefitEnvironmental benefit
  Stage 1
 Reducing 1.22% of the specific fresh coconut consumption Saving 952 million dongReducing waste water
Reducing the emission of solid waste

Waste water reached standard level B after being treated

 Improving the working condition environment and the surrounding environment
Reducing 21.3% of the specific feed water consumption Saving 31 million dong
  Reducing 18.3% s of the specific rice husk consumption  Saving  285 million dong
  Stage 2
  Reducing 0.82% of the specific fresh coconut consumption  Saving 593 - 860 million dong
 Reducing 23.75% of the specific feed water consumption Saving 32- 46 million dong
 Reducing 18.26% s of the specific rice husk consumption Saving 222 -322 million dong

            
The following is the typical cleaner production solutions of the factory:

 No.   Option Investment  Performance CP technique
 1 Managing and controlling water consumption40 million dong  Saving 33 million dong
Reducing 1.7m3  of water use/ton of product
 GH
 2 Using small flow taps5 million dong Increasing water pressure for washing, reducing the volume of water use; reducing emission EM
 3Using rubber brushes to collect solid waste before cleaning workshop ground1 million dongChanging methods of cleaning; reducing the volume of water use for washing EM
  4Improving nets at gas pits 1 million dongSaving 21 million dong
Collecting 50kg of coconut scrap per day; making by-products for oil pressing; reducing solid waste emission
PC
 5Balancing the suction and blowing process in material drying system: suction fans can be changed 40 million dong Saving 135 million dongPC
 6 Improving rice hush conveyor belt to prevent the spilling6.5 million dong Reducing the loss of rice husk during conveying; the loss reduced 95% after improving the convey belt. EM
 7 Recovering and recycling the maximum amount of condensate and flash steam 8 million dong  Reducing the heat loss from condensate steam- reducing the rice husk for the boiler OR
 8 Replacing existing steam traps by Steam gards399 million dong  Saving 315 million dong/year  EM
 9 Replacing steam boiler using husk by steam boiler using coconut shell  2.6 billion dong Saving 1 billion dong/year EM
 10 Constructing waste water treatment station 1.5 billion dong Treated  Waste water   quality is under standard limits EOP

Remarks: GH: Good Housekeeping, EM: Equipment Modification; OR: Onsite Recovery, EOP: End-of-pipe

Being aware of the benefits from the cleaner production, the company decided to maintain the operation of the cleaner production team, and put the cleaner production activities into the general management system of the company. To do this, a simple environment management system was established. Also, the company made an environmental policy which stipulates the strict implementation of the Law of Environmental Protection and regulations to ensure the sustainable development and minimize the causes of waste. Besides, the company integrated the production management system and the environmental management system so that the consumption of materials and energy were controlled by monitoring the criteria in waste streams. A system of sampling and legal procedure was also built to be applied in collecting, checking, and analyzing environmental data.

An environmental monitoring plan has been conducted. It aims to monitor the considerable improvements brought in by the cleaner production options, and to adjust them in case some environmental benefits are reduced. The environmental monitoring system comprises air monitoring and waste water monitoring.

Cleaner Production not only brings in benefits from energy saving, emission reduction, water consumption reduction, but also helps the company to develop production, improve product quality, and affirm the company reputation. The cleaner production options which have been implemented at the company are typical examples for coconut processing factories in Vietnam./.