Complete membrane filtration system
Complete membrane filtration system for a commercial wastewater treatment company provided by Dynatec Systems. The system gives them the ability to meet demanding requirements for discharge with the tubular ultrafiltration (UF) systems followed by two stage reverse osmosis (RO). They can safely meet the requirements for PFAS, 1-4 dioxane, heavy metals, chemical oxygen demand (COD) and total dissolved solids (TDS).
Membrane Technologies
Membrane Technologies have several membrane configurations available for Membrane Bioreactor (MBR) applications. Project requirements should drive the decision for membrane selection.
Technologies available for use in MBRs:
- Tubular
- Hollow Fiber
- Flat Sheet
Tubular Membranes
The original and most proven type of ultrafiltration is tubular membranes:
- Sturdy construction
- Long membrane life
- High flux rates
Of all membrane types, they are more robust and can be subjected to high pressures in demanding applications.
Out-of-Basin MBR is a configuration where mixed liquor is pumped at high velocity through the tubular membrane module. The high velocity continuously scours the membrane surface and prevents solids from building up. This process produces high flux rates and simple operation. No backwash is required. Lowest capital cost option because of the high flux rates and simple operation. Out-of-Basin MBRs by Dynatec are designed so that the energy requirements are equal to other types of MBR systems.
Advantages
- Higher performance due to higher MLSS and long sludge age
- Low Cost
- Simple Operation
- Entire system may be placed indoors
- Membrane tank not required
Hollow Fiber Membranes
They are constructed of a microporous structure having a dense selective layer on the outside surface. Many fibers must be packed into bundles and potted into tubes to form a membrane module. The surface area of even a few square feet require miles of fibers. Modules must contain no defective or broken fibers, therefore production requires strict quality control.
These membranes can withstand very high pressures from the outside, but are limited on pressure exerted from the inside of the fiber, therefore backwash rates are limited to around twice the normal permeate rate. The feed fluid is applied on the outside of the fibers and the permeate is removed down the fiber bore.
Hollow Fiber membranes are applied in clean water applications and are used in MBRs, but are limited to lower concentrations of solids than the other membrane types.
Advantages
- Low Energy
- Membrane Space efficient for large installations >5 MGD (million gallons per day)
- Cost effective for large installations
Disadvantages
- Not Cost Effective for small plants
- Membranes damaged easily
- More complicated system
- Cannot operate with high MLSS
For more information on membrane filtration systems, please contact us today.
#MBR, #UFRO, #UFMBR
ZLD wastewater treatment system
ZLD wastewater treatment system for a food processing company was provided by Dynatec. The primary treatment is provided by a tubular membrane bioreactor (MBR) followed by reverse osmosis (RO). Membrane bioreactor permeate is reused for cooling tower make up. Reverse osmosis permeate is re-used for high-quality users and reverse osmosis (RO) reject is used for irrigation.
ZLD wastewater treatment system
Recovery and reuse systems have been provided by Dynatec Systems to many industries. The ability to recover and reuse water has many benefits.
- Saving on water costs
- Saving on wastewater disposal charges
- Decreased environmental impact
- Protection from regulatory changes
- Decrease dependence on water provider/source
- Ability to expand without affecting water demand
- Overcome water scarcity issues
- Consistently high-quality for water reuse
Ultrafiltration (UF), Membrane Bioreactor (MBR), Nanofiltration (NF) and Reverse Osmosis (RO) are employed by Dynatec for water reuse projects. Water recovery and water reuse has been successfully implemented with industrial and sanitary wastewater streams for:
- Cooling tower make up
- Boiler feed
- Irrigation
- Toilet flushing
- Direct potable reuse
- Cleaning/wash applications
- Rinse processes
- Painting processes
- Other plant processes
Recovery and reuse systems provided by Dynatec Systems:
- Resorts, hotels, and retirement homes
- Golf courses
- Automotive companies
- Food and beverage companies
- Apartment buildings
- Landfills
- Mines
- Metal finishing plants
- Aerospace companies
Membrane Bioreactors
Membrane bioreactors offer a unique and effective solution for the treatment and reuse of industrial wastewater in industries such as landfills, automotive, aerostructures, distilleries and dairies. Our industry-leading designs and innovation also deliver superior performance for sanitary wastewater and biological nutrient removal applications.
The MBR configuration has proven to be optimal for treatment of many industrial wastewaters when treatment efficiency is an important consideration.
The MBR is the ideal bioreactor configuration for treatment of organic or inorganic contaminants present in industrial wastewaters. MBRs operate at a higher efficiency while achieving consistent design performance objectives. This makes MBR a more cost effective method of treatment when performance and tank requirements are considered.
Bioreactor systems such as the conventional activated sludge system, sequencing batch reactor system and trickling filters are typically designed for operation at a lower volumetric removal rate, requiring larger tanks and more space. These conventional systems often experience upsets that inhibit settling and therefore require much more operator attention than a membrane bioreactor.
The MBR has proven to be optimal for treatment of many industrial wastewaters because it is less susceptible to upsets. The MBR’s performance is not affected by changes in sludge settleability like the conventional systems, making MBR a wise choice for industrial systems that have more difficult to treat waste streams. Dynatec has over 42 years experience in dealing with difficult to treat industrial wastewaters using membrane filtration.
For more information on zero-liquid discharge (ZLD) wastewater treatment systems, please contact us today.
https://www.dynatecsystems.com/technologies/recovery-and-reuse/
Landfill leachate treatment system
Landfill leachate treatment system for a hazardous waste landfill incorporates heavy metals pretreatment followed by a tubular MBR system.
The MBR reduces:
- ammonia
- phenol
- Polychlorinated Biphenyl (PCB)
- chemical oxygen demand (COD)
- volatiles and semi-volatiles
- and other contaminants adequately for discharge
The system reduces PFAS 30-60% and carbon is utilized to reduce PFAS to low ppt concentrations.
Landfill leachate treatment systems with Membrane Bioreactors (MBR)s have developed many unique process improvements for industrial wastewater applications. Dynatec successfully uses Ultrafiltration (UF), MBR and Reverse Osmosis (RO) for landfill leachate applications.
Landfill leachate treatment requirements
Treatment can vary, depending on the discharge requirements, and the contaminants present
Landfill leachate is characterized by:
- High Total Dissolved Solids (TDS)
- Heavy metals
- High BOD
- Color
- High COD
- High ammonia
Landfill leachate treatment systems options
The MBR option: an aerated biological mixed liquor process operating at very high solids concentrations.
The advantages are:
- Long sludge age produces a well acclimated biomass. High concentration (typically 12,000 to 20,000 mg/l) provides very high rates of reaction
- Excellent nitrification and de-nitrification
- Smaller footprint then conventional aerated systems
- High-quality effluent as a result of using membranes for final clarification
- Lower sludge production than conventional systems
Typical MBR results in landfills:
| Parameter | BOD | COD | TSS | Ammonia |
|---|---|---|---|---|
| Influent | 500 | 4000 | 150 | 1000 |
| Effluent | <5 | 800 | <5 | <1 |
| % Removal | >99% | 80% | >96% | >99% |
The system produces bio-sludge, which can either be dewatered for disposal, or disposed of as a liquid sludge.
Alternative landfill leachate treatment options:
- Chemical precipitation of metals before MBR treatment
- RO after MBR treatment removes organic and inorganic contaminants, and color
- UF followed by RO
The two effluent streams from a RO system are:
- Permeate
- Concentrate (or reject)
This can be re-injected into the landfill. Its long-term effects on leachate concentrations should be considered.
Conclusion
The MBR process provides the highest possible levels of organic removal with essentially zero suspended solids in the effluent. This is the ideal feed system for RO treatment.
RO permeate can be used for other non-potable purposes:
- Irrigation
- Truck washing
- Dust control
Dynatec membrane treatment systems have successfully provided outstanding performance in many landfill leachate applications. Considerations for this technology include:
- Membrane treatment offers reliable, consistent landfill leachate
- Systems are highly cost effective, and require low levels of operator interface
- The best membrane system configuration for each application should be individually evaluated
- Membrane treatment is broadly applied in the US and abroad
https://www.dynatecsystems.com/industries/landfill-leachate-treatment/
For more information on landfill leachate treatment systems, please contact us today.
MBR for transmissivity improvement
MBR for transmissivity improvement – Dynatec provided a low pressure nanofiltration (NF) system to remove humic and fulvic acid to improve the transmissivity (UVT) of treated water discharge. The NF system also minimizes the reject volume making the membrane approach practical.
Demands for development of membranes with specific performance continue to increase as water quality requirements tighten and water treatment system designs become more complex.
Where UV is employed for disinfection the requirement for transmissivity improvement has become important at many facilities.
The NF membrane typically rejects only larger polyvalent cations and anions and as a result produces a very small volume of reject.
MBR for transmissivity
Nanofiltration systems are typically used for:
- Color removal from surface water sources including removal of disinfection precursors
- Retention of humic and fulvic acids in landfill leachate to improve UV transmissivity
- Pharmaceutical solvent recovery and management
- Removal of tar compounds in petroleum industry
- Separation of blood compounds in medicine
- Water softening
Dynatec specializes in extensive industrial reverse osmosis (RO) membrane systems and nanofiltration (NF) membrane systems to remove soluble components of wastewater that may not have been removed by primary treatment. In most cases, the purified water can be reused.
RO is capable of rejecting soluble constituents of aqueous streams, such as:
- Bacteria
- Salts
- Sugars
- Proteins
- A wide range of organics and colors
- Improves the color, taste and properties of the fluid
This process is commonly used to purify water and remove salts and other impurities. It can be used to purify fluids such as ethanol, which will pass through the reverse osmosis membrane, while rejecting other ions and contaminants from passing.
Industrial Reverse Osmosis/Nanofiltration systems
The most common use for reverse osmosis is in purifying water. It is used to produce water that meets the most demanding specifications. This differs significantly from other RO systems that are often only designed to treat potable water. Our system is specifically designed to accommodate:
- Minimize reject volume
- Variable characteristics
- Minimize fouling
RO and NF Technology
RO uses a membrane that is semi-permeable, allowing the fluid that is being purified to pass through it, while rejecting the contaminants that remain. Most NF and RO systems are operated in crossflow to allow the membrane to continually clean itself.
Integrated clean-in-place (CIP)
The membrane skid has an integrated CIP system on the skid. This is especially important for wastewater reuse systems because the cleaning frequency of the skid is often higher than in other RO applications. With an integrated CIP system, cleaning is fast and easy, minimizing the operator’s time.
For more information on nanofiltration, please contact us today.
Wastewater Treatment System
Wastewater treatment system for an aerostructures manufacturer provided by Dynatec Systems. The system removes heavy metals and produces water for reuse. Dynatec Systems also provided a double pass reverse osmosis (RO) system to produce low conductivity/low Total Dissolved Solids (TDS) water (less than 3mg/l) for the metal finishing process in lieu of a deionizing system. The RO system was much more cost effective in processing the relatively high TDS water supply.
Dynatec specializes in extensive reverse osmosis (RO) membrane systems and nanofiltration (NF) membrane systems to remove soluble components of wastewater that may not have been removed by primary treatment. In most cases, the purified water can be reused.
RO is capable of rejecting soluble constituents of aqueous streams, such as:
- Bacteria
- Salts
- Sugars
- Proteins
- A wide range of organics and colors
- Improves the color, taste and properties of the fluid
This process is commonly used to purify water and remove salts and other impurities. It can be used to purify fluids such as ethanol, which will pass through the reverse osmosis membrane, while rejecting other ions and contaminants from passing.
Reverse Osmosis/Nanofiltration systems
The most common use for reverse osmosis is in purifying water. It is used to produce water that meets the most demanding specifications. This differs significantly from other RO systems that are often only designed to treat potable water. Our system is specifically designed to accommodate:
- Minimize reject volume
- Variable characteristics
- Minimize fouling
For more information on a wastewater treatment system to remove heavy metals and produce water for reuse, please contact us today.
Textile biological treatment system
A textile biological treatment system needed to upgrade the performance of their existing wastewater treatment system. They wanted to reuse the majority of their wastewater. This created the need for a robust system that will produce purified water for reuse. Dynatec was selected to provide the ultrafiltration (UF) components of the MBR. Out-of-basin membranes were the ideal choice.
Membranes consistently produce high-quality effluent. The presence of pigments were problematic for other alternatives. The Dynatec MBR UF system was pilot tested and demonstrated consistent performance providing the high-quality permeate required.
The MBR effluent, now free of suspended solids and most of the organic load, is then processed through a RO system for further purification. The Dynatec MBR system, using tubular out-of-basin membranes, permits operation at high MLSS and produces lower chemical oxygen demand (COD) results thereby reducing the organic fouling at the downstream RO system.
The system capacity more than doubled employing existing aeration tanks with an upgrade to the aeration. Qualitative treatment results also improved. The project cost was less than the cost to expand the plant as a conventional biological plant with the addition of another bioreactor and clarifier.
Textile biological treatment system
Textile wastewater treatment systems have been provided by Dynatec Systems for numerous facilities. The treatment method chosen depends greatly on the specific characteristics of a plant’s wastewater and the discharge requirements or wastewater reuse applications within the plant.
Textile Biological Treatment Systems Technology Benefits
- Consistent high-quality water
- Easy maintenance avoids labor costs and regulations
- Minimal operator intervention required
- Reduced sludge disposal costs
- Brine recovery saves on processing cost
- Simple mechanical process
Textile Wastewater Treatment Systems Solutions
- Separation of specific components in the wastewater
- Ultrafiltration (UF) for pigment separation
- Ultrafiltration (UF) for size separation and reuse
- Membrane Bioreactor (MBR) for wastewater treatment and discharge
- Membrane Bioreactor (MBR) and Reverse Osmosis (RO) for wastewater purification and reuse
Contaminants Removed:
- Heavy metals
- Suspended solids
- Biochemical Oxygen Demand (BOD)
- Phosphorous
- Colloidal material
- Pigments
- Chemical Oxygen Demand (COD)
- Inorganic solids separation
Ultrafiltration offers the following advantages over conventional separation:
- No chemical required
- Very little labor required
- Simple mechanical process
- Less sludge
- Ability to concentrate the retentate for beneficial use
- Less space required
- Overall lower operating costs
Tubular Configuration:
- Higher permeate rate
- Lower rates of fouling
- Higher concentration of retentate
- Easier to clean
- Longer membrane life
- Low operating cost
For more information on wastewater reuse, please contact us today.
https://www.dynatecsystems.com/technologies/membrane-technologies/ultrafiltration-systems/
Existing biological system converted
Existing biological system converted to membrane bioreactor (MBR) at a dairy. The converted plant has the ability to process wastewater at the rate of 475,000 gallons per day.
The conversion provided the ability to increase the treatment rate and at the same time improve the quality of the treated water. The system operated at a higher concentration of mixed liquor in the bioreactor and thereby increase the throughput capacity of existing bioreactor and improves the quality of the treated water that is discharged.
MBR conversion/retrofit/upgrade solutions are offered by Dynatec Systems for a wide range of applications. Our goal for every retrofit application is to make changes that:
- Simplify the process
- Reduce operating costs
- Expand capacity
- Bring your system into compliance
Existing biological system converted to MBR
MBR conversion/retrofit/upgrades are perfect for Dynatec’s unique out-of-basin membrane systems. We can reuse any existing tankage and rarely require new tanks to be built.
- Replace equipment
- Upgrade systems
- Reuse assets
The Dynatec out-of-basin membrane configuration provided for optimization of both biological and membrane systems.
Contaminants Removed
- Biochemical Oxygen Demand (BOD)
- Total Suspended Solids (TSS)
- Chemical Oxygen Demand (COD)
- Phosphorous
- Ammonia
- Fat, Oil and Grease (FOG)
For more information about an existing biological system converted to a membrane bioreactor, please contact us today.
Ultrafilter for Membrane Bioreactor
Ultrafilter (UF) for membrane bioreactor (MBR) installed to process 400,000 gallons per day for a cheese processing plant.
The processing plant’s existing conventional biological system was unable to process the required volume and unable to meet the increasing qualitative discharge requirements. By converting the plant to a Dynatec membrane bioreactor (MBR), the facility was able to increase the system output while meeting the stricter discharge regulations.
Contaminants removed:
- Biochemical oxygen demand (BOD)
- Phosphorous
- Suspended solids
- Chemical oxygen demand (COD)
- Ammonia
- Fats, oil and grease (FOG)
Dynatec Systems industry-leading tubular ultrafiltration (UF) system is used to treat a broad range of industrial wastewater by separating insoluble components from waste streams. As a cost effective and simple solution for separating insoluble components and colloidal contaminants from a waste stream, wastewater UF offers significant advantages over conventional separation. It is a useful process that does not require chemicals or much space to separate insoluble contaminants.
UF is a pressure-driven process that removes the following from wastewater and other solutions:
- Emulsified oils
- Metal hydroxides
- Colloids
- Emulsions
- Dispersed material
- Suspended solids
- Other large molecular-weight materials
Ultrafiltration systems are also capable of concentrating:
- Bacteria
- Some proteins
- Some dyes
- Colloidal or emulsified components
Ultrafiltration systems excels at the clarification of solutions containing:
- Suspended solids
- Bacteria
- High concentrations of macromolecules including:
- Oil and water
- Fruit juice
- Milk
- Whey
- Electro-coat paints
- Pharmaceuticals
- Poly-vinyl alcohol and indigo
- Potable water
- Tertiary wastewater
Ultrafiltration offers the following advantages over conventional separation:
- No chemical required
- Very little labor required
- Simple mechanical process
- Less sludge
- Ability to concentrate the retentate for beneficial use
- Less space required
- Overall lower operating costs
Tubular Configuration:
- Higher permeate rate
- Lower rates of fouling
- Higher concentration of retentate
- Easier to clean
- Longer membrane life
- Low operating cost
For more information about converting an existing conventional biological system to a membrane bioreactor (MBR), please contact us today.
https://www.dynatecsystems.com/technologies/membrane-technologies/ultrafiltration-systems/
Ultrafiltration Removes Oil and Metals
Ultrafiltration removes oil and metals to allow the treated water to be acceptable for discharge for an automobile parts manufacturer. A UF system was selected based upon its ability to consistently meet the discharge requirements without chemicals and with limited operator involvement. This UF system removes oil and reduces zinc in compliance with discharge requirements.
Ultrafiltration excels at the clarification of solutions containing suspended solids, bacteria and high concentrations of macromolecules, including oil thus making this an excellent solution to this problem.
Ultrafiltration uses a membrane to separate suspended and colloidal materials in an aqueous phase. It will normally separate everything that is not soluble and some larger macro molecules that are soluble. Ultrafiltration uses a PVDF tubular membrane that is permeable to perform the separation. One of the uses that demonstrates the usefulness of ultrafiltration is separation of oil in an emulsion from water. In this case, machining coolant oil emulsions can have the oil separated and concentrated, with the water passing through the membrane, and the concentrated oil phase disposed.
Dynatec Systems industry-leading tubular ultrafiltration (UF) system is used to treat a broad range of industrial wastewater by separating insoluble components from waste streams. As a cost effective and simple solution for separating insoluble components and colloidal contaminants from a waste stream, wastewater UF offers significant advantages over conventional separation. It is a useful process that does not require chemicals or much space to separate insoluble contaminants.
UF is a pressure-driven process that removes the following from wastewater and other solutions:
- Emulsified oils
- Metal hydroxides
- Colloids
- Emulsions
- Dispersed material
- Suspended solids
- Other large molecular-weight materials
Ultrafiltration systems are also capable of concentrating:
- Bacteria
- Some proteins
- Some dyes
- Colloidal or emulsified components
Ultrafiltration systems excels at the clarification of solutions containing:
- Suspended solids
- Bacteria
- High concentrations of macromolecules including:
- Oil and water
- Fruit juice
- Milk
- Whey
- Electro-coat paints
- Pharmaceuticals
- Poly-vinyl alcohol and indigo
- Potable water
- Tertiary wastewater
Ultrafiltration offers the following advantages over conventional separation:
- No chemical required
- Very little labor required
- Simple mechanical process
- Less sludge
- Ability to concentrate the retentate for beneficial use
- Less space required
- Overall lower operating costs
Tubular Configuration:
- Higher permeate rate
- Lower rates of fouling
- Higher concentration of retentate
- Easier to clean
- Longer membrane life
- Low operating cost
For more information on ultrafiltration systems to remove oil and metals, please contact us today.
https://www.dynatecsystems.com/technologies/membrane-technologies/ultrafiltration-systems/
Ultrafiltration Membrane System
Automotive connectors manufacturer of quick connectors for transfer of engine oil cooling fluids was in need of a wastewater treatment system to address oil and grease and heavy metal contaminants in their discharge. Based on understanding of the waste stream and ability to provide a cost effective solution, Dynatec was selected to provide a system that would produce effluent that reliably met the sewer discharge requirements. By using a combination of free oil separation and an ultrafiltration membrane system, in addition to removing all of the suspended solids, the Dynatec supplied system consistently provides effluent meeting discharge requirements.
Automotive Connectors Manufacturer Contaminants removed:
- Biochemical oxygen demand (BOD)
- Oil/grease
- Suspended solids
- Chemical oxygen demand (COD)
- Zinc
- Chrome
Dynatec Systems industry-leading tubular ultrafiltration (UF) system is used to treat a broad range of industrial wastewater by separating insoluble components from waste streams. As a cost effective and simple solution for separating insoluble components and colloidal contaminants from a waste stream, wastewater UF offers significant advantages over conventional separation. It is a useful process that does not require chemicals or much space to separate insoluble contaminants.
UF is a pressure-driven process that removes the following from wastewater and other solutions:
- Emulsified oils
- Metal hydroxides
- Colloids
- Emulsions
- Dispersed material
- Suspended solids
- Other large molecular-weight materials
Ultrafiltration systems are also capable of concentrating:
- Bacteria
- Some proteins
- Some dyes
- Colloidal or emulsified components
Ultrafiltration systems excels at the clarification of solutions containing:
- Suspended solids
- Bacteria
- High concentrations of macromolecules including:
- Oil and water
- Fruit juice
- Milk
- Whey
- Electro-coat paints
- Pharmaceuticals
- Poly-vinyl alcohol and indigo
- Potable water
- Tertiary wastewater
Ultrafiltration offers the following advantages over conventional separation:
- No chemical required
- Very little labor required
- Simple mechanical process
- Less sludge
- Ability to concentrate the retentate for beneficial use
- Less space required
- Overall lower operating costs
Tubular Configuration:
- Higher permeate rate
- Lower rates of fouling
- Higher concentration of retentate
- Easier to clean
- Longer membrane life
- Low operating cost
For more information on wastewater treatment systems to address oil and grease and heavy metal contaminants, please contact us today.