Dynatec News

Reuse Water in Juice Plant

Reuse water ability in a new treatment system was needed in a juice processing company for other plant processes. The high strength wastewater, with a COD of 16,000mg/L, needed to meet stringent effluent criteria to make this possible.

Reuse water in juice plant

The solution, provided by Dynatec, includes a membrane bioreactor (MBR) followed by a double pass reverse osmosis (RO) system. The permeate meets all limits for BOD, COD, metals, TSS, and TDS.

Reuse water 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

Reuse water 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

For more information, please contact us today.

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

MBR RO for Reuse

MBR RO for reuse, A domestic manufacturer of personal protective equipment is undergoing a major plant expansion. The company now needs to treat their wastewater for reuse as they discharge to a small POTW that could not handle the new volumes or contaminant loading. The new wastewater treatment plant is being built in stages. The first system is a relatively small MBR to handle the first phase of their expanded production. The second system is designed to handle their full-scale production, which will only be several months after the first phase is completed. This system includes an EQ tank, MBR with pre and post anoxic tanks and tubular UF, and RO. The system is designed so that all the RO permeate can be reused while the RO reject can be discharged to the local POTW. One of the goals of the MBR is to reduce nitrates from a high initial concentration to very low levels so that the RO reject will meet that total nitrogen limits for discharge to the POTW. The plant is designed so that future expansion is easily achieved.

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

For more information about wastewater reuse, contact us today.

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

Sanitary Wastewater Expansion

Sanitary wastewater expansion of a previously supplied MBR by Dynatec Systems for a mall was recently completed. The original system treated the sanitary wastewater generated at the mall and wastewater from several restaurants on the property. Recent changes at the mall, including the addition of residential units, resulted in greater wastewater volumes. The expansion was relatively fast and easy due to the modular nature of Dynatec’s UF skids. The permeate meets all requirements for direct discharge to the environment and the compact design fits the limited space available at the mall.

Sanitary wastewater from private communities, industrial and academic campuses, resorts, and various other facilities can be treated to meet discharge permit limits or to meet reuse standards. Dynatec provides systems that accomplish this in a small space and with low operating costs.

Membrane bioreactor (MBR) solutions provided

• Plant expansion
• Improved effluent quality
• Purification for direct discharge
• Existing plant upgrades
• Sequencing batch reactor (SBR) to MBR conversions
• Wastewater reuse for:
  • Cooling tower
  • Boiler
  • Toilet flushing
  • Irrigation applications
• Recovery and reuse of wastewater for:
  • Apartment buildings
  • Industrial campuses
  • Academic campuses
  • Hotels and resorts
  • Golf courses
• Compact wastewater treatment systems
• Containerized/mobile sanitary treatment systems
• Water mining systems

Significant Benefits

• Lower energy cost allows operation in larger plants
• Robust tubular membranes reduce replacement cost
• High mixed liquor concentration reduces tankage required and higher treated water quality
• Small system footprint
• Easily expandable
• Safe automatic clean-in-place system protects operators
• Predictable, consistently high performance
• Remote monitoring – compatible with cell phone or iPad

Contaminants removed from sanitary wastewater

• Biochemical Oxygen Demand (BOD)
• Oils and Grease (O&G)
• Total Suspended Solids (TSS)
• Ammonia
• Total N
• Fecal Coliforms

For more information on sanitary wastewater expansion, please contact Dynatec to discuss.

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

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 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

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

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

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 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/

Ultrafilter for Metals Removal

A metallurgy facility needed to remove metals from their wastewater. Bench scale treatability work performed by Dynatec proved the effectiveness of the ultrafilter (UF) system.  The UF system removed chromium, copper, zinc, nickel, and other metals to low parts per billion levels needed for surface water discharge.

The company produces ferrous metals (atomized steel and sponge iron) for use by auto parts makers and other manufacturers.  The steel and iron powders are used to make structural parts, filters, and bearings, as well as, in friction applications such as brake pads and linings. 

Dynatec has hundreds of installations in similar applications.

Ultrafilter for metals removal

Ultrafilter for metals removal can be achieved by chemical precipitation simply using hydroxide or sulfide precipitation. However, complexed metals have other chemistries available to cause precipitation to occur, typically in a simple one-step operation. There is no need to enlarge or flocculate the precipitated crystals, as is typical in conventional chemical systems since the pore structure of the membrane will retain the small precipitated crystals.

When oils are or may be present in the waste stream, the positive filtration provided by ultrafiltration prevents upsets that can occur with settlement or flotation devices. The membrane prevents passage of both oils and solids, including the precipitated heavy metals from passing, creating a concentrate of the metals.

If the waste stream consists principally of oils, a concentrate of the oils that will also contain the heavy metals is created that can be disposed of to oil recyclers. When the same type of waste is treated using DAF or clarifier technology, a sludge is created that can only be disposed to a landfill, and the benefit of reuse is lost and disposal is more expensive.

When the waste stream consists mostly of metals and suspended solids, the addition of a precipitant allows the waste to be simply ultrafiltered. The amount of sludge created is much less than the amount created using other technologies.

Dynatec’s design of ultrafiltration systems for heavy metals separation utilizes tubular membranes operated at high flow velocities. This design allows for high concentrations of metals and/or oils, and/or suspended solids in solution while minimizing cleaning maintenance of the membrane system.

Dynatec has provided systems for:

• Heavy metals removal
• Precious metals removal and recovery
• Complex wastewater streams

Ultrafilter for Metals Removal Solutions

• Ultrafiltration (UF) for metals removal 
  • Heavy Metals
  • Metals in wastewater with oils and grease
  • Precious Metals 
  • Metals in wastewater with chelating agents
• Ultrafiltration (UF) for reuse
• Reverse Osmosis (RO) for high purity water reuse
• Complete turnkey system solutions
• Filtration for sewer discharge of direct discharge to environment

Dynatec has designed and provided systems for reuse for:

• Wash water
• Rinse water
• Plant processes
• Cooling tower
• Boiler feed

Contaminants Removed

• Oil and Grease
• Heavy Metals
• Precious Metals
• Lubricants
• Surfactants
• Acids
• Biochemical Oxygen Demand (BOD)
• Chemical Oxygen Demand (COD)
• Suspended Solids
• Dissolved Solids

Please reach out if you have any metals removal projects that we can help with.

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

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/

Anaerobic digester and aerobic MBR followed by RO for whiskey manufacturer

Anaerobic digester and aerobic MBR followed by RO provided by Dynatec Systems.  A whiskey manufacturer needed a wastewater treatment system to reduce very high organic content BOD and COD.  As well as, solids content TSS of the wastewater stillage to achieve the demanding final treated water discharge standards.  A membrane filter is used for pretreatment prior to the anaerobic system.  The tubular membrane filter employed with the biological system is not dependent on the settling characteristics and produces very high-quality effluent.

The equipment was containerized to make the implementation as easy as possible.

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 anaerobic digester and aerobic membrane bioreactor followed by reverse osmosis, please contact us today.

https://www.dynatecsystems.com/technologies/membrane-bioreactors-and-reuse/industrial-membrane-bioreactors/

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.

https://www.dynatecsystems.com/technologies/membrane-bioreactors-and-reuse/mbr-conversion-retrofit-upgrade-solutions/

#MBR, #wastewatertreatment, #UFMBR

A Clear Look at Reuse Systems

A Clear Look at Reuse Systems

Dynatec’s Tom Doherty had a great article published in the November 2021 issue of Water Environment & Technology (WE&T) Operations & Engineering magazine. 

Dynatec has completed over a hundred wastewater purification and reuse systems for industry and for sanitary waste. To begin, there needs to be a detailed characterization of the wastewater along with a detailed characterization of the requirements for reuse. The characterization of the wastewater and requirements for reuse will determine the treatment/purification requirements and thereby define the CAPEX and OPEX. This estimate of costs should be completed early in the process to determine if the reuse project has merit and is cost-effective.

All of Dynatec’s treatment and reuse systems employ membrane filtration because the properly selected membranes provide the best method of insuring the qualitative result desired and in almost every case they provide the most cost effective method of achieving the desired result.

Membrane selection is based upon wastewater characteristics and the desired recovered water quality requirements in the process in which the membranes are utilized.

With the above information, treatability work is typically conducted to define the treatment system requirements and design parameters.

Typical wastewater treatment/purification systems for reuse are as follows.

• Purification of process baths/tanks for reuse typically using ultrafiltration
  • Cleaning tanks with contaminants removed employing Ultrafiltration
  • Scrubbers with contaminants removed employing Ultrafiltration
  • Vibratory metal finishing with contaminants removed employing Ultrafiltration
  • Any other employing UF and RO filtration to produce higher quality water for reuse
• Recovery of specific components found in the wastewater
  • Precious metal recovery employing Ultrafiltration, Nanofiltration and/or Reverse Osmosis
  • Latex paint recovery employing Ultrafiltration
  • Textile size separation and recovery
  • Others where removal of water allows concentration of the product to be recovered
• MBR biological treatment for reuse in cooling towers, scrubbers and like type water users that do not require potable water or high-purity water
  • Food processing facilities where MBR permeate is used in cooling towers and scrubbers
  • Metal working facilities where MBR permeate is used in cooling towers and scrubbers
  • General manufacturing
• MBR biological treatment followed by Nanofiltration or Reverse Osmosis
  • All types of manufacturing and food processing facilities where there is a requirement for higher purity water for reuse.

A Clear Look at Reuse Systems pdf

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