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/
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/
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/
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.
MBR Discharge and Reuse
High quality discharge and reuse from MBR – Cereal Plant
Since the plant produces a food product, ultimate water quality was vital. The two-stage membrane system (MBR + RO) and final sterilization with ultraviolet (UV) treatment provided the quality assurance that plant management required. In addition, the membranes used in the MBR system are external to the aeration basin and are tubular. This type of membrane is much less susceptible to failure than the immersed type.
This process combines aerated biological treatment with an out-of-basin ultrafiltration (UF) system. In combination with reverse osmosis treatment, Dynatec was able to provide the client with the necessary assurances that the water quality would not be compromised, and that the water would be suitable for process purposes, such as boiler feed water.
System Advantages:
The system provides many advantages for the operators and owners
Redundant membrane skids for ease of operation and cleaning.
Simple automated cleaning operations with membranes in place
High mixed liquor concentration ensures lowest possible sludge production and requires smallest possible footprint
Simple, low maintenance system
Long-lasting tubular membranes with 0.03 μm membrane, ensuring removal of bacteria and viruses
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 wastewater treatment systems. MBRs 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.
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 wastewater treatment systems 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 Systems has over 42 years experience in dealing with difficult to treat industrial wastewaters using membrane filtration.
Contact Dynatec Systems today to discuss your wastewater solution.
https://www.dynatecsystems.com/industries/food-and-beverage/cereal/
Wastewater Reuse – Phosphate Mine
Mining operations can produce a large amount of wastewater in the form of 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 has provided a system to a phosphate mining operation that treats five million gallons of wastewater per day. The customer was motivated to put a treatment/reuse system 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.
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 product 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 reject and permeate from the membrane systems. The final system has alleviated concerns of future environmental infractions and has saved the customer money.
Contact Dynatec Systems to discuss your wastewater solution.
https://www.dynatecsystems.com/technologies/recovery-and-reuse/
MBR Conversion – Pharmaceutical Company
A pharmaceutical firm suffered from frequent upsets to their existing treatment process. The existing conventional aerobic biological system followed by a gravity clarifier, led to discharge noncompliance.
Dynatec completed bench top treatability studies and pilot studies to confirm the best method to improve performance. Adding ultrafilters as part of the conversion to a Membrane Bioreactor (MBR) was the best course of action.
MBR Conversion – Pharmaceutical Company
The wastewater stream was high in organic content (BOD, COD), and suspended solids (TSS). The MBR conversion, using a Dynatec ultrafiltration system allowed the customer to run the biological system at high mixed liquor concentrations without concern for settling characteristics. The higher mixed liquor concentration and longer sludge age proved to be successful in consistently reducing BOD and COD into compliance.
The system was designed to treat nearly 300,000 gallons per day. The COD was consistently reduced to 300 – 500 mg/l from 14,000 mg/l while BOD was reduced to non-detect.
The upgraded system handled variable loads in terms of organic load and flow rates. It consistently delivered high-quality effluent with less operator attention than their previous system. Additionally, the customer no longer faced fines for exceeding discharge limits for organics and solids.
Dynatec completed the process design, provided the equipment, and performed the installation. Existing tanks and aeration were utilized, keeping the conversion cost to less than any alternative.
Dynatec Systems industry-leading tubular ultrafiltration (UF) system can be 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 ultrafiltration offers significant advantages over conventional separation. It is a useful process that does not require chemicals or much space to separate insoluble contaminants.
Contact Dynatec to discuss your wastewater treatment needs.
SBR to MBR Conversion
SBR to MBR Conversion
Dynatec provided tubular ultrafiltration systems as part of an SBR to MBR conversion. The upgraded treatment system allowed the facility to meet all discharge requirements and increased the capacity of the plant. The SBR could treat 4,000 barrels per day and the upgraded plant utilizing an out-of-basin MBR treats up to 10,000 barrels of wastewater per day.
To meet direct discharge limits, the oil refinery needed to upgrade their treatment system. The existing SBR could not handle the volume of wastewater and was not consistently meeting the discharge quality limits.
The MBR reduced the COD to below 50ppm and phenols are reduced from over 750ppm to non-detect.
The solution for this plant was an oil water separator followed by out-of-basin membrane bioreactor (MBR). The permeate from the MBR met all requirements for discharging to sea water. COD in the permeate was less than 300ppm. Phenols in the permeate were consistently less than 1ppm.
Dynatec provided containerized systems for easy and fast installation at site.
Significant Savings
- Simple process
- Fewer chemicals needed
- Low maintenance
Technology Benefits
- Consistent high-quality water
- Low operating costs
- Minimal operator intervention required
- Reduced sludge disposal costs
Contaminants Removed
- Oil and grease
- Heavy metals
- COD
- BOD
- Suspended solids
- Phenols
Flexible Retrofits
Since the membranes were installed outside the reactor, the membranes allowed for easy retrofit to any bioreactor configuration (circular, rectangular, above or below ground), . Frequently, the existing infrastructure and building space can be reused with little or no changes.
Expandability
The membrane system is easy to expand, since the out of basin configuration allows for simple addition of more membranes, or membrane skids.
Better Performance
The MBR System eliminates many of the unit processes associated with conventional treatment systems. The bioreactor tanks degrade constituents normally considered recalcitrant and they eliminate solids carry-over from occurring, allowing long sludge retention times.
Contact Dynatec to discuss your application.
Automotive Connectors Manufacturer
A leading automotive connectors manufacturer 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 the following effluent:
Parameters Influent Effluent
Oil and Grease 1,100 <100
Zinc 2.4 <1.48
Chromium 3.2 <1.7
Automotive Solutions Provided
- Oil and metals removal
- Membrane Bioreactor (MBR) biological treatment
- MBR for water reuse of wastewater
- High purity reuse with MBR and RO
Complete purification and reuse of wastewater system solutions for many automotive firms were provided by Dynatec Systems for:
- Cooling tower makeup
- Irrigation
- Boiler feed
- Paint line
Contaminants Removed
- Oil and Grease
- Metals
- Suspended Solids
- Surfactants
- Biochemical Oxygen Demand (BOD)
- Chemical Oxygen Demand (COD)
- Dissolved Solids
Automotive oily wastewater treatment systems for many facilities in the automotive industry were designed and supplied by Dynatec Systems including the following:
- Stamping plants
- Powertrain plants
- Assembly plants
- Bearing manufacturer
Our customers include many large car and truck brands as well as suppliers to those manufacturers.
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
Ultrafiltration 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
For more information, please contact us today.
https://www.dynatecsystems.com/technologies/recovery-and-reuse/
https://www.dynatecsystems.com/technologies/membrane-technologies/ultrafiltration-systems/
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.