The investment cost of the ZLD – Zero liquid discharge system is about 20,000,000 VND to 100,000,000 VND per cubic meter of clean water. The payback period is from 5 to 7 years. Details are presented in section 3 of the article.
With the increasing requirements for the quality of wastewater after treatment at manufacturing plants. The need for Zero liquid discharge (ZLD) is not only in Vietnam but also in countries around the world.
When your own factory needs to install a ZLD system. The question you are interested in is: “How much does the investment cost of the Zero liquid discharge (ZLD) system cost?”. Related content will be answered immediately below.
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1. What does the ZLD factory include?
The ZLD factory includes the production processes at the factory and the water treatment recovery system that meets ZLD standards. The treated water allows reuse and no liquid discharge. The final product is clean water and solids.
The ZLD plant includes:
– Input water.
– Production line.
– Wastewater recovery system.
– Wastewater treatment system meeting ZLD standards (pre-treatment, ultrafiltration, ion exchange, evaporation, crystallization drying, …).
– Clean water tank (can be reused, recycled back to production, …).
– Final solid treatment area (can be recovered for reuse).
You may be interested in: What technologies does the Zero liquid discharge system include?
2. Factors affecting the investment cost of the ZLD system for the factory.
2.1 Characteristics of wastewater to be treated.
The more complex the characteristics of wastewater, the higher the concentration of substances in wastewater. Requires multi-stage, advanced and modern water treatment technology. These technologies may increase investment costs compared to conventional wastewater treatment methods.
2.2 Capacity.
The larger the water capacity, the more optimal the design capacity of the treatment system. Water is treated continuously without causing the system to stop and cause interruptions. But that does not mean that the larger the capacity, the cheaper the cost.
For example, a water treatment system of 50 m3/day and night and 100 m3/day and night, the volume of equipment installed for the two systems is not much different. If calculating the unit price of investment cost for 1 m3 of clean water, the 100 m3/day and night water treatment system will be cheaper.
To understand more correctly, when investing in a water treatment system, it is necessary to pay attention to the unit price per cubic meter of clean water, not the total investment cost for a system.
2.3 Water quality after treatment.
To achieve high quality water after treatment, it requires advanced and modern water treatment technology. This leads to increased investment costs for low requirements for post-treatment wastewater quality.
2.4 Plan and estimated investment costs.
Depending on the investment goals and budget, when planning for the factory. In the ZLD system, equipment and technology suitable for the given budget will be selected.
2.5 Installation space affects the investment cost of the ZLD system.
Not only for the ZLD system but also for other water treatment systems. Installation space is always a factor that greatly affects investment costs. Specifically:
When the installation area is limited, it will lead to the need to choose compact equipment but still have to meet the required capacity. Or have to find other space-saving solutions. This problem will increase investment costs more than having a large installation area.
Infrastructure: if the installation space is limited, the construction of water pipes, tanks, tanks, etc. will have to find solutions to optimize the installation space. This may increase construction costs.
System complexity: when the installation area is small, the design and installation of the water treatment system will become more complicated. The equipment must be optimized to fit the limited space. Requires special installation methods. This increases the cost of design and production.
Comfort and safety: the space for installing the water treatment system affects the comfort and safety of workers during operation and maintenance. Not having enough space to work will not ensure safety standards. This can increase the initial investment cost.
2.6 Market price.
When your factory is located in an area with a high standard of living, the cost of the products you buy will also be high. Including the cost of equipment, labor, machinery, etc.
You can consider finding service providers in regions and countries with lower market prices. But with the same equivalent technology. Consider the points to be able to save a significant cost for your factory.
2.7 Benefits of the ZLD system.
Choosing a modern programming tool to operate a fully automatic or semi-automatic factory. This is also a factor that needs to balance the budget when investing in the ZLD system.
Investing in an advanced and modern system will avoid risks due to human errors. At the same time, it also requires a team of highly qualified technicians and a large initial investment cost.
On the contrary, investing in a system that is operated entirely by humans will consume a large amount of labor. Many operating errors from workers will arise, leading to unstable system operation. Negatively affecting the entire production activities of the factory.
A harmonious combination of automation under human control will be a highly appreciated option.
2.8 Accompanying service costs.
Some accompanying costs when installing the system need to be noted with the contractor. Including:
– Design costs.
– Operating chemical costs.
– Operating labor costs.
– Transportation costs.
– Water quality analysis fees.
3. Investment costs of ZLD water treatment system.
3.1 Cost percentage of water treatment processes in the ZLD system.
The ZLD water treatment process is quite similar to the wastewater treatment processes of manufacturing industries. However, the cost is allocated to each water treatment category to help investors better understand the investment cost layout. From there, they can have more effective investment analysis and options.
ZLD system investment cost ratio table in Vietnam.
| STT | Category | Percentage of total cost (%) |
| 1 | Pre-processing | 20% |
| 2 | RO ultrafiltration (specialized for wastewater and high recovery rate) | 30% |
| 3 | Evaporation and crystallization | 40% |
| 4 | Other costs | 10% |
The investment cost of the ZLD system in the table is proposed for specific water treatment technology or equipment. When there is an adjustment according to the design, the cost will have certain changes.
3.2 The price list of Zero liquid discharge (ZLD) system in Vietnam is provided by TVTS.
| Product Description
Zero liquid discharge (ZLD) system – Main technology: Pretreatment, open channel RO membrane technology, Force Circulation MEE evaporation – Input capacity: 100 m3/day – Main material: Stainless steel – Operator: Prefabricated house – Control panel: Automatic programming, PLC |
Price (VND) |
| Zero liquid discharge system (ZLD) 100 KLD
Application for wastewater in pharmaceutical, medical, chemical industries |
10.550.000.000 VND |
| Zero liquid discharge (ZLD) 100 KLD system
Application for beverage and soft drink wastewater |
6.765.900.000 VND |
| Zero liquid discharge (ZLD) 100 KLD system
Application for textile wastewater |
9.950.000.000 VND |
| Zero liquid discharge system (ZLD) 100 KLD
Application for wastewater from electroplating, electroplating, electronics industries |
10.950.000.000 VND |
| Zero liquid discharge system (ZLD) 100 KLD
Application for wastewater in food, livestock, slaughter industries |
8.655.450.000 VND |
Note: Price does not include VAT and chemical and system operating costs.
The price list is the basis for investors to balance their investment budget. From there, they can plan to deploy the ZLD system for their factory more reasonably.
When you have questions about costs, techniques, and technology in the field of water and environmental treatment, please contact us for better support.
