Dynatec’s Capabilities
- Feasibility studies with capital and operating cost analyses
- Treatability studies at both bench-top and pilot levels
- Process design
- System engineering and design
- Equipment installation
- Commissioning, startup and operator training
- Design-own-operate-maintain (DBOOM) on long term contracts
Technology Benefits
- Simple mechanical process
- Ability to treat varying input loads with consistently high quality output
- Ability to reuse purified water
- Low operating costs
- Unattended operation
- Minimal disposal costs
Significant Savings
- Waste stream reduction lowers discharge fees
- Water reuse reduces overall consumption
- Material recovery saves on processing chemicals
- Easy maintenance avoids labor costs and regulations
Case Studies
MEMBRANE TECHNOLOGIES
From Dynatec Systems, Inc.
Dynatec Systems, Inc. has installed a water reuse system in a major cereals plant in Georgia, USA.
Since 1978, Dynatec Systems, lnc. has designed, built and installed treatment solutions for water and wastewater using membrane technology. The broad-based knowledge that this experience has provided and te wide range of applications successfully treated provides our customers with the confidence that only such experience brings to their applications.
Dynatec’s background allows for a total solution approach:
- Broad-based knowledge of membrane types and configurations.
- Extensive application experience
- Design of cost-effective treatment solutions
- Membrane selection from a wide variety of membrane manufacturers
- Total systems approach to a project, providing all of the components and controls necessary to complete a project.
Membrane Technologies
The membrane process is pressure driven, separating the various constituents of aqueous streams. There are four main categories of membranes used in water and wastewater treatment:
- Microfiltration is used to separate and concentrate particulates, such as precipitated and coagulated metals. Often also is used as pretreatment to reverse osmosis systems.
- Ultrafiltration is used to separate and concentrate particulates, colloidal solids and emulsions. In a tubular configuration this is the most commonly used membrane for industrial pretreatment, such as removal of oils and precipitated metals from waste solutions.
- Nanofiltration is used to separate and concentrate polyvalent ions such as metals and organics, such as color, allowing most monovalent ions to pass the membrane. This membrane is also used for water softening.
- Reverse Osmosis: is used to separate and concentrate monovalent ions such as chlorides in seawater as well as soluble organics. The most well known use of reverse osmosis is probably in desalination, where seawater is used as the feed stream, and potable water is produced. However, there are many other uses for reverse osmosis.
Membrane Technology is well suited to variable feed stream, since they provide a positive barrier to the constituents, producing consistent results even under variable influent conditions.
Membrane Configurations
Membranes come in various types of configuration, depending on the application. The three most commonly used are:
Tubular:
Tubular membranes are used when water contains higher levels of suspended or colloidal solid and emulsions. The larger the id of the membrane, the higher it is possible to concentrate the insoluble components of the stream.
Hollow Fiber:
Hollow fiber membranes are used in an “inside-out” configuration when low levels of solids are present. They are also used in an “outside-in” configuration when placed in bundles in tanks for filtration.
Spiral Wound:
Spiral-wound membranes are most commonly used in reverse osmosis and nanofiltration applications. The feed stream must have essentially zero solids to prevent plugging of the module.
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