Water Treatment and Wastewater Treatment with Membrane Technology
Envopur® Membrane separation processes for water treatment, recirculation and wastewater treatment
Plants of our Envopur® product line cover the full range of membrane separation processes for water treatment, recirculation and wastewater treatment. They are suitable for most types of industrial process water and have proved robust and versatile during many years of operation.
Often efficient solutions can only be realized by combination of different treatment processes. We offer a variety of processes. Dependung on your specific application we combine the following processes to achieve the optimum customer solution: e. g. Envopur® in combination with physico-chemical processes, biological processes or we combine different membrane processes.
Process principle
Membrane filtration is the selective separation and concentration of dissloved as well as non-dissolved substances from the feed under pressure. The pore size of the membrane determines which molecules pass the membrane. According to the type of the feed and the required degree of purification specially membrane types are used.
Product overview
| Separation process |
Product |
Cuf-off |
Molecular weight |
Type of particels |
| |
|
(µm) |
(Da) |
|
| Reverse Osmosis |
Envopur® NUO/HUO |
0,001 - 0,0001 |
< 100 |
ionogenic |
| Nanofiltration |
Envopur® NFI |
0,01 - 0,001 |
100 - 1 000 |
molecular – macromolecular |
| Ultrafiltration |
Envopur® UFI |
0,1 - 0,01 |
1 000 - 500 000 |
colloidal – macromolecular |
| Microfiltration |
Envopur® MFI |
< 0,9 |
> 500 000 |
colloidal – micro-dispersed |
Modular plant systems EnviModul
modular plant systems EnviModul
Your contact
Mr. Michael Kuhn
Phone +49 6154 6998 26
michael.kuhn@envirochemie.com
REVERSE OSMOSIS
MIKROFILTRATION
ULTRAFILTRATION
ELECTROCHEMICAL DEIONISATION
NANOFILTRATION
ENVOPUR® NUO/HUO
REVERSE OSMOSIS
| Capacity: |
approx. 100 l/h to 100 m³/h |
| Treatment goal: |
selective separation of molecular materials and inorganic ions |
| Membrane: |
organic |
| Plant type: |
spiral wound module
|
| Applications: |
- Pretreatment of utility water
- Water recycling
- Effluent purification after pretreatment
- Concentration of dissolved materials
|
|
|
ENVOPUR® MFI
STANDARD MIKROFILTRATION
| Capacity: |
approx. 100 l/h to 100 m³/h |
| Treatment goal: |
standardized membrane plant to increase usability period/recycle degreasing baths |
| Membrane: |
organic, inorganic |
| Plant type: |
pipe module, spiral wound module |
| Applications: |
- retention of the high quality of the purification abilities of the baths
- increase in the usability period of the baths with fewer chemical additives
- reduction in the use of chemicals
- less energy used for heating
- less contaminated waste
- less contamination of following baths
|
Concept of the plant
Envopur® microfiltration plants are used in the bypass back to the bath. An integrated feed pump fills the feed tank of the plant. As soon as the tank's capacity is reached, the circulation pump pushes the degreasing solution through the membrane module.
The cross-flow velocity and the pressure causes some of the solution to permeate the membrane (permeate) and be purified. The rest of the solution (retentate) still contains the oils, fats and contaminants and flows back into the feed tank, where these substances become concentrated.
During the filtration, a backflush impulse can be given to the membrane elements at regular intervals (back flushing). This keeps the filtration working at its highest efficiency and effectiveness.
The plants are fully automated by an integrated PLC and can also be set to be run manually.
Die Envopur® MFI plants are equipped with highly effective ceramic membranes which distinguish themselves from the usual materials by the following characteristics:
- high thermal stability (steam sterilizable)
- good mechanical resistance
- good chemical resistance (pH 1-14)
- easy to clean
- effective use of filtrate
- long life span
- compact modular forms
|
Envopur® standard microfiltration
Envopur® microfiltration
|
ENVOPUR® UF
ULTRAFILTRATION
| Capacity: |
approx. 100 L/h to 100 m³/h |
| Treatment goal: |
separation of colloidal and insoluble materials |
| Membrane: |
organic, inorganic |
| Plant type: |
tube module, spiral wound module |
| Application: |
- Wash/rinse water purification and recycling Emulsion splitting
- recovery of valuable substances
- continuous bath cleansing
- selective separation of substances
|
|
Envopur® UFI membranefiltration
|
ENVOPUR® EDI
ELECTROCHEMICAL DEIONISATION
Electro-deionization (EDI) is based on the engineering principle of electrodialysis. It is an electrochemical separation process in which ions from a low concentration solution pass through a special membrane to a solution of higher concentration. The activating force is an electric field between cathode and anode.
In this electric field, anions (ex. Cl-) pass through the anion exchange membrane on their way to the anode and the cations (ex. Na+) through the cation exchange membrane on their way to the cathode. This results in a solution with low salt concentration (diluate) between the two membranes and a solution with high salt concentration (concentrate) outside of the ion exchange membranes.
Application:
Production of high purity and ultrapure water for industrial applications (chemical, cosmetic, pharmaceutical industries, semiconductor industry). Alternative to mixed bed ion exchange plants.
Performance:
Throughput from a few liters to many cubic meters per hour are possible, depending on the size of the EDI cells and the position of cells in relation to one another. EDI technology can produce electric conductivities of 0.1 µS/cm and less. The system works with a pure water yield factor of about 90-95% (the proportion of diluate to feed water). The resulting concentrate is normally piped back to the pre-desalination stage, which minimizes waste water output.
Distinguishing characteristics of EDI:
- continuous process with constant quality standard
- no regenerative chemicals necessary
- low energy costs
- easy operation due to automation
- high product quality
- high product yield
|
Envopur® electro-deionization
|
ENVOPUR® NF
NANOFILTRATION
| Capacity: |
approx. 100 l/h to 100 m³/h |
| Treatmeant goal: |
selective separation of molecular materials and inorganic ions |
| Membrane: |
organic, ceramic |
| Plant type: |
spiral wound module, tube module |
| Applications: |
- Decolorization of waste water (Dytex process)
- Process-integrated recovery of valuable substances
- Water recycling, for example in industrial laundries
- Ground water purification and softening
- Selective separation of substances
- Diafiltration
|
Types of water:
|
Example of a diafiltration for the liquid dye production
|
