The WD membrane spiral module enables the highest recovery rates for acids and bases from solutions in diffusion dialysis processes, e.g., with metal salts.
The WD module uses the diffusion dialysis process.
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ADVANTAGES OF WD-MODULE IN SURFACE TECHNOLOGY APPLICATIONS
Our WD Membrane Spiral Modules can be used in a broad range of applications. Industries in which our modules can be used for acid or base recovery include the surface treatment industry, the printed circuit board industry, the semiconductor industry, the recycling of fly ashes, hydrometallurgy, etc.
ACIDS
H2SO4
HCl
H3PO4
HNO3
METALS
Ni
Cu
Fe
Al
BASES
NaOH
KOH
Functionality of the spiral membrane module WD
Acid recovery using the WD membrane spiral module.
ADVANTAGES OF WD-MODULE IN SURFACE TECHNOLOGY APPLICATIONS
The WD Membrane Spiral Module excels in achieving the highest recovery rates.
For instance, in an anodizing process, it can recover up to 95 % of the free acid from the purge stream, with less than 1 % of the aluminum returning to the process along with the recovered acid. In the case of base recovery processes, our WD Membrane Spiral Module attains an impressive 70% recovery of the free base.
The recovery of acids or bases using our WD Membrane Spiral Modules can also be utilized for metal recovery processes. Please feel free to contact us to assess your application, including special cases
The continuous operation of diffusion dialysis allows core processes, e.g., in surface treatment, to operate steadily at the optimum operating point, resulting in minimal material losses and the highest product quality.
Subsequent waste management also becomes more cost-effective due to diffusion dialysis with WD Membrane Spiral Modules. Environmental guidelines can be complied with reduced operating costs.
Additionally, the replacement of membrane spiral modules leads to very low costs compared to conventional plate and frame membrane devices for diffusion dialysis.
WD Membrane Spiral Module enables nearly complete recovery of free acids and bases. These recovered raw materials can be further utilized at the highest value level and reduce the salt load in wastewater.
With its high-volume density of the membrane surface, the WD Membrane Spiral Module can process considerably more solution than conventional devices within the same space requirement. This design also enables high process availability and minimizes maintenance time. The modules are easily scalable according to your requirement.
VERSIONS OF WD MODULE
We offer different models of our WD Membrane Spiral Module to meet specific requirements.
Two Distinct Perfomance Sizes:Choose between WD10, offering a flow rate of 5-15 l/h, and WD20, designed for a flow rate of 10-30 l/h.
Customized Membranes: Based on your specific application, we select the most suitable membrane to maximize your benefit.
End sealing: For highly aggressive solutions, the WD Spiral Membrane Module can be supplied with a highly resistant potting.
Please refer to our data sheets for specifications of different versions:
In addition to the delivery of WD Membrane Spiral Modules, we also offer stackable module boxes and systems equipped with up to 10 WD modules for end customers and plant manufacturers.
The DS20-10 module system can be equipped with up to 10 WD20 series Membrane Spiral Modules.
Technical data:
Dimensions: 1600 x 800 x 1200 mm (L x W x H)
Modules: up to 10 modules of the WD20 series
Flow rate: 90-300 l/h (10 modules)
Weight: approx. 200 kg (incl. modules, without liquids)
Advantages:
Very compact
Stackable
Cost effective
Ready for plug and operate
Furthermore, there is the option to order a system that perfectly suits your needs. In addition to tailored solutions, we presently provide the following standardized variants:
