Dynatec News

Dairy Converts System to MBR

A dairy converts an existing biological system to a membrane bioreactor (MBR). 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 the existing bioreactor and improves the quality of the treated water (0.03 micron membrane allows less bacteria and virus to penetrate the membrane surface) that is discharged.

The Dynatec “out of bioreactor” membrane configuration provided for optimization of both biological and membrane systems. Dynatec’s membrane system decoupled the membrane filtration and biological treatment in a way that allowed for optimization of both the solids liquid separation and the biological system design. The system is capable of operating with MLSS as high as 25,000 mg/L and this has maximized the operator flexibility in plant operations to achieve optimum performance. The positive recirculation through the membrane system minimizes fouling and reduces operator attention.

The amount of space required for the membrane system was small and therefore the system was easily added because of the flexibility in locating the membrane system. The system did not need to be next to or close to the bioreactor. The higher system membrane flux (permeate rate) meant that fewer membranes were required. The simple design required less ancillary equipment and operation at high MLSS meant that no additional tanks were required.

Dynatec’s membrane systems draws on our many years of experience to provide a cost effective, simple system that outperforms other systems, especially with difficult to treat waste streams.

Dynatec’s membrane system was selected in part because the overall capital cost was lower than alternative solutions and because the conversion was principally centered on the addition of the membrane system which was inexpensive to install and the location did not need to be close to the existing bioreactor.

Another reason for the selection of Dynatec by the dairy converts existing system to MBR was because the membrane systems are completely enclosed which minimizes maintenance and provides a safe, clean environment for operators.  The operators were not exposed to fumes and noxious gases.

The system was designed for remote access on any device with a web browser enabling the operator to review system performance and make changes without a site visit.

The unique operation of the membrane system makes it the right solution for difficult to treat wastewater applications such as dairy wastewater. The membrane system operates using tubular membranes in series with a recirculation flow that continuously scours the walls of the membrane surface.  This prevents the buildup of solids on the membrane surface.  The elimination of the solids buildup on the membrane surface results in high flux rates and consistent, dependable operation even in difficult applications where the solids do not filter well.

Contact Dynatec to discuss your wastewater needs.

https://www.dynatecsystems.com/technologies/membrane-bioreactors/mbr-conversion-r…pgrade-solutions/ ‎

Anaerobic MBR with Dynatec Tubular UF Membranes

Maximizing Efficiency & Sustainability in Industrial

Wastewater Treatment

Why Choose Anaerobic MBR?

Anaerobic Membrane Bioreactor (AnMBR) technology is revolutionizing industrial wastewater treatment by combining anaerobic digestion with advanced membrane filtration. This cutting-edge process enables industries to achieve superior wastewater treatment while generating biogas for energy recovery.

The Dynatec Advantage: Tubular UF Membranes Dynatec’s tubular ultrafiltration (UF) membranes are at the core of our AnMBR systems, offering unmatched performance in treating high-strength wastewater.

These membranes provide:

Superior Solids Handling –

Handles high mixed liquor suspended solids (MLSS) without frequent cleaning or fouling.

Consistent Permeate Quality –

Achieves exceptional effluent quality with low turbidity and high removal of contaminants.

Robust & Durable Design – Built to withstand challenging industrial wastewater conditions.

Minimized Maintenance – Long membrane lifespan with reduced downtime and lower operating costs.

Key Benefits of Anaerobic MBR with Dynatec UF Membranes

1. Energy Generation & Cost Savings

– Converts organic matter into biogas, reducing energy costs.

– Eliminates the need for aeration, lowering power consumption significantly.

2. High-Quality Effluent for Reuse or Discharge

– Produces low-BOD and TSS effluent, meeting stringent discharge limits.

– Enables water reuse for non-potable applications, reducing water demand.

3. Compact Footprint & Modular Scalability

– Requires less space than conventional anaerobic treatment.

– Easily scalable to meet varying flow rates and loads.

4. Low Sludge Production & Reduced Handling Costs

– Generates minimal biosolids, lowering disposal costs.

– Reduces environmental impact and regulatory burdens.

Ideal Applications

– Food & Beverage Processing

– Agriculture / Manure

– Pulp & Paper Mills

– Pharmaceutical & Chemical Industries

– Landfill Leachate Treatment

-High-Strength Industrial Wastewater

Optimize Your Wastewater Treatment Today. Leverage the power of Anaerobic MBR with Dynatec’s tubular UF membranes for a sustainable, cost-effective, and energy-efficient solution.

Contact us today to learn how our advanced wastewater treatment systems can work for you.

Color Removal with Membranes

Color Removal with Membranes

Membranes selectively remove dissolved species from a variety of sources including:

• Surface water
• Rinse water from fabric dyeing
• Industrial wastewater
• Landfill leachate

Demands for development of membranes with specific performance continue to increase as water quality requirements tighten and water treatment system designs become more complex. Such demands lead to development of new reverse osmosis (RO) and nanofiltration (NF) membranes with higher rejection characteristics for better dissolved salts and boron removal.

New applications have developed which require selective removal of certain dissolved species such as:

• hardness
• natural organic matter (NOM)
• pesticides
• Organic material which causes color

Engineers desire high removal of specific contaminants in these applications, but at the same time want to maintain some level of salts in the water so it does not become aggressive, which can cause corrosion problems with piping in the distribution network.

Nanofiltration (NF) membranes have good selectivity for removal of naturally occurring organic compounds as well as iron. Organic material can be found in groundwater sources which have surface water intrusion, or groundwater sources which are influenced by decomposing vegetative materials. The contamination of these waters is measured in terms of color units.

Treated water from landfill leachate is another source of color in wastewater. When this wastewater is discharged to a municipal treatment plant (POTW), color and the presence of certain organic acids affect the performance of the final ultraviolet treatment step, causing the receiving facility to require that these components be reduced or eliminated.

Dynatec has developed a number of options for color removal with membranes and organic acid removal. Since each project requires different levels of removal and has different treatment requirements, treatability work is typically carried out to establish the required treatment process steps. Typically, treatment requirements not only include color removal, but may also require the removal of COD, BOD, oil and grease, metals, etc. The treatment steps may include:

• metals and/or free-floating oil
• settleable materials removal
• ultrafiltration for removal of suspended colloidal materials
• nanofiltration using several options that are available, depending on the requirements of the particular application
• reverse osmosis for the removal of color, dissolved solids and organics

Finally, some color removal can be accomplished with ion exchange resins specially developed for color removal.

Dynatec will carry out treatability work at their treatment lab or will provide small-scale pilot equipment that is shipped to the project site where longer term studies can be carried out.

Contact us today to discuss your wastewater treatment needs.

www.dynatecsystems.com/industries/textile-wastewat…reatment-systems/

Ultrafiltration Removes Oil and Metals

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/

Tubular MBR at Grand Bahama Shipyard

Dynatec Systems is proud to be a part of this major infrastructure upgrade at Grand Bahama Shipyard. The Tubular Membrane Bioreactor System ensures the best possible biological treatment, consistent quality, and a small footprint. The upgraded WWTP will allow the shipyard to handle a much greater volume of wastewater while minimizing the environmental impact.

https://insidemarine.com/grand-bahama-shipyard/

Landfill Leachate Treatment System

A landfill which produces 200,000gpd of leachate needed a new treatment system to be able to discharge to surface water. Dynatec provided a Membrane Bioreactor (MBR) that utilized an existing tank as the bioreactor. A Reverse Osmosis (RO) system was also provided to further purify the MBR permeate prior to discharge. Repurposing existing assets saved the customer significant costs. The MBR conversion was the easiest and most cost-effective method to achieve their treatment goals.

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 system 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

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:

For more information on landfill leachate treatment systems, please contact Dynatec.

https://www.dynatecsystems.com/industries/landfill-leachate-treatment/

Poultry Processing Plant MBR

Dynatec Systems’ installed a HiBrid™ UF for MBR service at a poultry processing plant that processes 800,000 gallons per day. The Membrane Bioreactor (MBR) operates at high flux which means less membrane surface area is required and ultimately saving capital cost. Dynatec Systems has installed over 600 membrane systems providing wastewater solutions since 1979. The HiBrid™ MBR UF combines sound engineering and effective process design with state-of-the-art materials of construction.

Outsource your wastewater service! Dynatec will design-build-own-operate-maintain (DBOOM) your wastewater treatment plant allowing you to concentrate on your core business.

The industrial MBR is the ideal bioreactor configuration for treatment of organic or inorganic contaminants present in industrial wastewaters. MBR’s operate at a higher efficiency while achieving consistent design performance objectives. This makes MBR a more cost effective method of industrial wastewater treatment when performance and tank requirements are considered.

Industrial Membrane Bioreactors Benefits:

• Higher flux
• Lower costs
• Better membranes
• Improved permeate quality
• Less operator attention and maintenance

Industrial Membrane Bioreactor (MBR) Applications

Dynatec’s industrial MBR is the ideal biological system for industrial wastewater treatment. It is designed to handle high strength wastewater containing high concentrations of:

• Biochemical Oxygen Demand (BOD)
• Chemical Oxygen Demand (COD)
• Oil & Grease (FOG)
• Volatiles
• Metals
• Ammonia
• Nitrate
• Inorganic

The performance is not affected by changes in sludge settleability like the conventional systems, making it the wise choice for industrial wastewater treatment systems that have difficult-to-treat waste streams. Dynatec’s MBRs can effectively handle industrial wastewater streams that would otherwise be toxic or inhibitory to other biological treatment systems.

Backed by decades of experience with MBRs, Dynatec has developed many unique process solutions necessary for industrial wastewater treatment applications such as:

• Landfill leachate
• Hazardous landfill leachate with metals removal
• Automotive manufacturing wastewater
• Food manufacturing wastewater
• Titanium processing wastewater

Contact Dynatec Systems today to discuss your wastewater solutions.

https://www.dynatecsystems.com/industries/food-and-beverage/poultry-processing-wastewater-treatment/

Chemical plant wastewater treatment

Chemical plant wastewater treatment was failing to meet discharge limits, installed a Dynatec UF system to separate emulsified fats, oils, and grease (FOG) from their permeate.  The raw wastewater has more than 2,000ppm of emulsified FOG with peaks much higher at times. The system consists of four UF units and related components. The system currently treats 66gpm, but all 4 units are expandable. The permeate is free of FOG and is acceptable for discharge.

https://www.dynatecsystems.com/technologies/membrane-technologies/ultrafiltration-systems/

Chemical wastewater treatment utilizing membrane systems that range from selective separation of product to wastewater treatment and reuse.  Dynatec Systems has provided many different chemical wastewater solutions.

Chemical Wastewater Treatment Solutions

• Ultrafiltration (UF), Nanofiltration (NF) and Reverse Osmosis (RO) for selective separation of product for recovery
• MBR biological treatment
• Wastewater reuse with MBR
• Conversions of existing systems to MBR
  • Expand existing bioreactor treatment capacity
  • Improve discharge quality
  • Produce water for reuse
  • Reduce surcharge
• High purity reuse with MBR and RO

Contaminants Removed

• Organics
• Inorganic solids
• Phenol
• Solvents
• Oils
• Acids

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

Dynatec specializes in extensive RO and 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

RO 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.

RO/NF 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.

Tubular Configuration:

• Higher permeate rate
• Lower rates of fouling
• Higher concentration of retentate
• Easier to clean
• Longer membrane life
• Low operating cost

To discuss your wastewater treatment solution, please contact us today.

Wastewater reuse

Wastewater reuse is achieved at an automotive plant. Wastewater equipment to treat both sanitary and production wastewater that included oily waste was designed and installed in a new transmission manufacturing facility.  The goal was to treat and purify water for reuse.

Dynatec met these demands by providing a membrane bioreactor (MBR) followed by a reverse osmosis (RO) system.  The MBR reduced BOD, TSS, and oil and grease to non-detect levels.  The RO is used to polish the MBR effluent so that it is suitable for reuse. It is reused in cleaning operations, cooling tower, and all production applications.

80%-90% of the wastewater is purified for reuse.  Additional industrial park wastewater (after primary clarification at the industrial park) is introduced to the system for treatment and purification.  The system is designed to receive 300,000gpd and purify 250,000gpd for reuse.

This novel approach greatly reduced the total amount of wastewater discharged by this plant.  It provided the water needed for production using a comprehensive system that Dynatec designed, supplied and installed.

Ultrafiltration (UF), Membrane Bioreactor (MBR), Nanofiltration (NF) and Reverse Osmosis (RO) are employed by Dynatec for these wastewater projects. Wastewater recovery and 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

For more information on wastewater reuse, please contact us today.

https://www.dynatecsystems.com/technologies/recovery-and-reuse/

High Quality Discharge MBR

Dynatec provides High Quality Discharge MBR system for Retirement Home

The retirement community consists of independent living homes and apartment homes in rural Maryland. The facility is in horse country, in a valley among rolling hills, and shares the area with high-end homes.

Previously, the facility had two septic tanks, and a recirculated sand bed filtration system. This created odors and caused mosquito infestations in summer. The facility chronically missed discharge limits, and thus was paying frequent fines. The sand bed filtration system was high maintenance, constantly flooding and requiring maintenance.

Replacement Criteria

In deciding on a replacement system, several criteria were important to the facility and to State regulators. The plant must be aesthetically pleasing. Odors must be minimized and if possible, eliminated. The plant had to achieve high levels of treatment to meet present and future discharge requirements. Future use of the treated water for irrigation is planned. The plant had to be operator friendly, and be capable of being monitored remotely, since full-time staff would not be available. The plant must be cost effective, from both capital and operating standpoints. Finally, the plant must be modular, in that future expansion of the facility must be accommodated in the design.

The initial plant sizing was nominally for 50,000 gallons per day of treatment capacity and has been expanded to 100,000 gallons per day.

System Design

After a review of the available treatment options, the owners of the facility decided on the (MBR) Membrane Bioreactor option. Due to the modular design of the system, they also chose the out-of-basin membrane module concept provided by the Dynatec MBR system. This process combines ease of use with all the requirements of both the owners and the regulators.

Odor control is achieved by using closed tanks vented to atmosphere. Air from the screening room is used to provide aeration to the reactors and the membranes, using the biomass as a biofilter. The negative pressure in the screen room ensures that there are no fugitive odors from the area. Mixing and aeration of the EQ tanks (the existing septic tanks) ensures no odors from that area.

Design Compatibility with the area: due to the nature of the area, the plant was designed to be installed in a “horse barn”, or at least a building that looks like a horse barn, but in fact, contains both the treatment plant and space for landscaping and other equipment.

High Levels of Treatment have been achieved since the plant’s inception in early 2007. Performance has been maintained since that time. Future plans include treatment for Total-N and Total-P to comply with Maryland’s “flush tax” requirements.

Cost Effective Installation was achieved using standard above-ground HDPE tanks, rather than the more common concrete tanks

Plant Expandability was achieved by the installation of one half of the plant, and the addition of a second membrane rack. No modifications to tanks or other work were required in 2009.

Conclusions:

Since completion and startup in early 2007, the plant has reliably performed, always producing high-quality water.

The Dynatec MBR concept provides economic advantages due to the modular design and the use of standard tanks. The cost of operation is modest when compared to alternatives.

Contact Dynatec Systems today to discuss your sanitary wastewater solution.

https://www.dynatecsystems.com/industries/sanitary-wastewater/