RO Concentrate Evaporation
Waste Management’s Atlantic Landfill RO Concentrate Evaporation Project Short Listed for 2022 GWI Industrial Project of the Year
This project utilizes Dynatec’s MBR and RO. The reject from the RO is evaporated using waste heat from the on-site power generation. It is a great project overall and this is a cost effective and sustainable approach to handling RO reject.
WAVERLY, VA – WM’s 120,000GPD leachate evaporation project, developed in partnership with Heartland Water Technology, was shortlisted for the Global Water Intelligence’s 2022 Industrial Project of the year. A 120,000GPD (450m3/d) evaporation solution for reverse osmosis (RO) concentrate at the Waverly landfill site in Virginia, US., this project addresses the challenges of RO concentrate waste stream treatment and disposal.
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 th
e operator’s time.
Contact Dynatec to discuss your wastewater application.
https://www.dynatecsystems.com/industries/landfill-leachate-treatment/
Wastewater Reuse for Phosphate Mine
Mining operations can produce a large amount of wastewater in the form spent liquor that requires treatment. The wastewater stream has a high concentration of contaminants that need to be separated from the water before it can be discharged or reused.
Dynatec provided a wastewater reuse system for a phosphate mining operation that treats 5 million gallons of wastewater per day. The customer was motivated to put a treatment/reuse system in an effort to separate a portion of the compounds in the wastewater for reuse. Also, the desired water quality for discharge met requirements for reuse of several water users in the plant.
Wastewater Reuse for Phosphate Mine
Dynatec was asked to conduct a pilot to study the feasibility of using membrane technology to purify the wastewater so that it could be reused in mining operations at the site. After several months of piloting, Dynatec was commissioned to supply five ultrafiltration skids, each capable of producing one million gallons per day of permeate. The ultrafilters were a part of the reuse system that also includes nanofiltration and reverse osmosis to produce water and products for reuse.
Due to the highly saturated wastewater stream, the pH of the wastewater was maintained at 1.8 s.u. to keep specific contaminants from precipitating in the membrane systems. The ultrafilters have successfully operated at this pH for over 10 years and their life span has not been negatively impacted by the nature of the wastewater.
The high strength spent liquor is processed through a series of membranes from UF to NF to RO. The customer has found reuse applications for the reject and permeate from the membrane systems. The final system has alleviated concerns of future environmental infractions and has saved the customer money.
Contact us today to discuss your wastewater application.
https://www.dynatecsystems.com/technologies/recovery-and-reuse/
Upgrades using existing assets
Upgrades using existing assets
When discharge regulations tighten, the need for water reuse grows, or wastewater volumes increase, existing Sequencing Batch Reactor (SBR) systems often become inadequate. In order to provide a solution with low capital cost in part by reusing existing assets, existing SBR plants can be converted to Membrane Bioreactors (MBR). This can usually be done by adding an out-of-basin tubular ultrafilter (UF) to the process. Using a Dynatec out-of-basin UF as part of an SBR to MBR conversion is the most cost-effective and easy to implement way to:
- Improve biological system performance
- Expand capacity
- Handle increase in strength of waste
- Mitigate upsets
- Reduce operator time
- Achieve consistent performance
Dynatec has used existing assets from SBR systems to convert to an MBR at many site including at landfills, food and beverage plants, chemical manufacturing, and automotive manufacturing facilities.
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
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 solution.
Brewery Reuse System
Brewery reuse system consists of a Membrane Bioreactor (MBR) and Reverse Osmosis (RO) system. The brewery produces high strength wastewater with COD > 8,000mg/L. An anaerobic digester ahead of the MBR, produces gas for heat and power generation. The wastewater then goes to the MBR and RO producing high-quality water that is suitable for reuse in brewery operations. The RO reject is combined with a portion of the MBR permeate to manage total TDS concentrations so it can be discharged to the sewer.
Complete wastewater purification and reuse systems
- Cooling tower makeup
- Irrigation (especially applicable to wineries)
- Boiler feed
- Cleaning and other plant processes
Containerized MBR for distillery
Brewery, distillery and winery wastewater treatment solutions
- Ultrafilter (UF) for removal of non-soluble contaminants
- Membrane Bioreactor (MBR)
- Conversion of existing biological systems to MBR
- To expand capacity
- To improve effluent quality
- MBR for treatment and wastewater reuse
- Reverse Osmosis (RO) for high purity wastewater reuse
- MBR for biological treatment
Contaminants Removed
- Suspended Solids
- Alcohol
- Sugars
- Ammonia
- Phosphorous
- Copper
- Biochemical Oxygen Demand (BOD)
- Chemical Oxygen Demand (COD)
- Dissolved Solids
- Acids
- Phenol
Technology Benefits – Membrane Separation System Using Tubular UF membranes
- Simple mechanical process
- Consistently high-quality water produced
- Ability to reuse purified water
- Low operating costs
- Unattended operation
- Skidded components reduce space requirements
- Ability to remotely monitor and control
- Cell phone and iPad compatible
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.
https://www.dynatecsystems.com/technologies/recovery-and-reuse/
Decentralized Wastewater Treatment Facility
Dynatec provided the membrane system for a demonstration plant situated directly adjacent to the Anaheim, CA City Hall. The system is designed to pump wastewater from a local sewer line, treat the wastewater for reuse, and return the waste activated sludge and screenings to the sewer line.
The DynaLift™ out-of-basin membrane system was selected because:
- The high flux rates achieved by the DynaLift™ system allowed for a small footprint
- High MLSS concentrations allows for smaller reactor tanks
- The positive filtration achieved with MBR provides consistent high-quality discharge
- The out-of-basin design allows for better demonstration of the technology
- The membrane construction allows for high removal of bacteria and virus – demonstrated 5-log removal of bacteria and 4-log removal of virus.
The plant design is for two trains with the first train presently installed. The design flow of this plant is 75,000 gallons per day, and due to internal water uses, such as screen flushing, the net output of the final plant when fully installed will be 104,350 gallons per day. The recycled water is used for irrigation and toilet flushing within the requirements of California’s Title 22 Regulations.
Plant automation design allows for periodic operator attention only when equipment maintenance or chemical refilling is required.
Following treatment in the MBR, the effluent is further treated using ozone followed by UV for ozone destruction and chlorine addition at 1 mg/L to ensure no re-growth in the final effluent.
Due to the proximity of City Hall and the fact that the plant is in a highly populated area, a state-of-the-art odor control system was installed. With the standard Dynatec design odor control is not typically required.
This is the first facility in California to use external MBR membranes, ozone and chlorination for water recycling. The use of decentralized wastewater treatment facilities is increasing and the City of Anaheim is in the forefront of this.
Contact Dynatec Systems today to discuss your wastewater reuse project.
https://www.dynatecsystems.com/industries/sanitary-wastewater/
MBR for Cereal Manufacturer
MBR for Major Cereal Manufacturer
Dynatec provides a turnkey wastewater solution for a food manufacturing wastewater process.
The problem
A major cereal manufacturing plant needed to upgrade their treatment process. MBR was selected, and the company was about one month away from entering into a contract with a major MBR supplier of submerged hollow fiber membrane bioreactors. The cereal manufacturer has had chronic problems in procuring wastewater treatment systems that were able to meet required treatment levels.
Dynatec was invited to offer a proposal based upon our previous experience and successful implementation of membrane bioreactor systems in the food industry. Specifically, Dynatec had previously installed a MBR system at another cereal manufacturing plant, which was operating without problems.
The Solution
When the two MBR systems were evaluated, Dynatec was selected. Reasons for selection were Dynatec’s experience with industrial wastewater, Dynatec’s record of success with other industrial MBR projects in the industry, lower cost and simpler operation.
Implementation
The system had one major requirement. It had to provide reliable operation without a long process of evaluating problems and making changes to the system. For this reason, the MBR process was used for its very reliable simple operation. A DAF was also provided by Dynatec ahead of the MBR system to remove solids and some BOD.
DAF effluent enters the MBR system for biological treatment and removal of solids. Some of the MBR effluent is reused on site for irrigation and other non-process uses. The other portion of MBR effluent is sent to a reverse osmosis system also provided by Dynatec. The RO effluent is used for cooling towers and other non-food reuse applications within the plant.
Dynatec was also engaged to install the system at the customer’s facility.
Contact Dynatec Systems today to discuss your wastewater application.
https://www.dynatecsystems.com/industries/food-and-beverage/cereal/
PFAS Removal from wastewater
Per- and polyfluoroalkyl substances, or PFAS, is a group of thousands of synthetic chemicals that were used for decades in the manufacturing of many consumer goods like waterproof clothing, non-stick pans, stain resistant fabrics, food packaging, and in industries like paper and cardboard manufacturing, metal plating, wire manufacturing, plastic manufacturing, and many other applications.
While providing desired characteristics to the many products in which they were used, PFAS chemicals have been tied to various negative health effects. Also of concern is the fact that they are very stable and break down very slowly in nature. PFAS chemicals are found in the environment and in the bloodstreams of people all over the world.
Dynatec has provided systems to remove PFAS from industrial wastewater to customers across the country and has dozens of systems in operation. While there are other technologies in various stages of development, there are two proven technologies for removing PFAS from industrial wastewater: carbon and reverse osmosis (RO). Dynatec has used both granular activated carbon (GAC) and RO for PFAS removal and we can help with the selection of treatment technology for a given application.
Landfills are a major accumulation location for PFAS as most of the PFAS laden products ultimately end up there. As the leader in landfill leachate treatment, Dynatec Systems has vast experience in treating complex, high strength wastewater and removing PFAS from these wastewater streams. With discharge limits shrinking across the country to single digit parts per trillion (ppt) for some of the most common PFAS compounds like PFOS and PFOA, most of our customers have non-detect levels of nearly all of the tested PFAS chemicals, even where the raw wastewater or leachate has individual PFAS compound concentrations of 3,000 to 5,000ppt or more.
We can design a system to meet any discharge requirement.
Please contact us today to discuss your PFAS removal needs.
Tubular UF MBR system for dairy wastewater
Tubular UF MBR system was a conversion of an existing extended air system. An existing bioreactor is also being utilized. The capacity of the existing bioreactor was doubled with an increase in the mixed liquor solids concentration and an upgrade of the fine bubble aeration to slot injector aeration.
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 tubular UF MBR system, please contact us today.
Chemical Manufacturer
Chemical manufacturer needed a wastewater treatment plant capable of producing high-quality permeate from raw wastewater. They had high concentrations of oil and grease, Total Suspended Solids (TSS), Biochemical Oxygen Demand (BOD), and Chemical Oxygen Demand (COD). Dynatec designed and manufactured a system including an Ultrafilter (UF) to removed Oil & Grease (O&G) and TSS. An MBR to further treat BOD and COD. The permeate is free of O&G, TSS, and BOD, while COD is greatly reduced. The system was designed so future expansion is easily achieved.
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 Manufacturer 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
https://www.dynatecsystems.com/technologies/membrane-technologies/ultrafiltration-systems/
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.