1,533 GPM Vertical Clarifier 304 SS to treat metal finishing wastewater at a steel plant.

Water & Wastewater Treatment Clarifiers and Separators

Does your plant need to treat a contaminated liquid stream?

  • Suspended (TSS) & dissolved (TDS) solids

  • Metals precipitation & reduction

  • Oil/FOG separation & recovery

  • Ammonia & VOC stripping

  • Mobile water treatment & rentals

Monroe Environmental designs and builds a broad range of water and wastewater systems and equipment for eliminating and minimizing a wide spectrum of pollutants from virtually all types of water and wastewater sources and applications.

Have technical questions about water & wastewater treatment systems?

Ask a Monroe Expert

Monroe’s Water & Wastewater Treatment Systems & Equipment

Above ground 46 ft. Circular Clarifier on legs to separate coal fines, grit, sand, tar and coagulated materials from wastewater generated from operations at a steel plant.

Circular Clarifiers & Thickeners

612 GPM Vertical Clarifier for fertilizer processing plant to aid in the removal of non-hindered concentrations of biological solids from a weak ammonia nitrate solution.

Lamella Plate Vertical Clarifiers

75 GPM Horizontal Plate Clarifier for chemical precipitation of phosphorus from a cheese production process.

Horizontal Plate Clarifiers

X-Flo Mobile Clarifiers separate and remove settle-able solids as well as floating oils at the same time.

X-Flo Mobile Clarifiers™

Monroe Oil Skimmer reclaiming condensed grease from venturi scrubber tank

Oil Recovery Units

The rebuilding and modification of two Air Stripping Towers for a municipal plant.

Air Strippers

Parallel Plate Settler for a beverage manufacturer, 11,040 ft2 of effective settling area. 316 SS plate settler modules and replacement effluent launders

Plate Settlers & Sludge Collectors

2,500 GPM API Oil/Water Separator to separate oils and solids from stormwater and wastewater generated at an oil refinery.

API Oil/Water Separators

Water & Wastewater Treatment Applications & Process Experience

Monroe Environmental has extensive experience with a wide variety of applications and processes for water & wastewater treatment. Click on a pollutant or process below to learn more about our approach to treating these contaminants.

Suspended (TSS) & Dissolved Solids (TDS)

Suspended & dissolved solids removal is required for nearly every water treatment application across every industry. Many physical and chemical characteristics as specific gravity, rise/settling rates, particle size, and chemical composition must be evaluated in order to select the correct technology for solids reduction.

Chemical treatment is a commonly used in conjunction with clarification, separation, and filtration to enhance solids removal. It is often required to precipitate dissolved solids and/or form floc that will more readily settle within a given liquid stream.

Monroe Environmental specializes in gravity separation of solids from liquid streams and offers a variety of clarification and separation technologies such as:

Contact a Monroe Applications Engineer to get assistance with selecting the correct technology for your application.

Metals Precipitation

Metals are commonly found in wastewater streams and can be removed through clarification, separation, and/or filtration. Metals that are dissolved in wastewater can often be brought out of solution and precipitated through pH adjustment. Additional chemicals such as coagulants and flocculants can then be used to enhance these removal processes.

Monroe Environmental has supplied countless metals removal systems across a variety of industries using the following technologies:

Oil Separation & Recovery; FOG Reduction

Oil separation is a critical wastewater treatment step required in many applications and industries. The physical and chemical properties of the oil should be carefully evaluated in order to correctly apply the various treatment technologies that exist. FOG refers to “fats, oils, and grease” and is a common designation and regulatory target in the food industry.

Recovered oil often has residual value if it can be re‑used or re‑purposed in a secondary market. Therefore, “separation for waste” versus “separation for recovery” treatment objectives are evaluated according to different cost/benefit principles.

In some cases, oil separation can be accomplished simultaneously with solids settling, however this is not always the case.

Monroe Environmental technologies for oil separation, skimming, and recovery include:

Ammonia & VOC Stripping

Ammonia (and nitrogen) regulations for water have become much more stringent in recent years. Ammonia that is dissolved in water can be removed under the correct process conditions at various stages the treatment process.

Volatile Organic Compounds (VOCs) such as TCE, DCE, BTEX (benzene, toluene, ethylene, xylene), and others are commonly found in groundwater, industrial wastewater, and other contaminated liquid streams.

Monroe Environmental utilizes the following for ammonia and VOC reduction:

Mobile Water Treatment

Mobile Water Treatment is required in specific industries such as fracking and pipe testing, but is also extremely beneficial during emergency events, scheduled maintenance shutdowns, and bypass operations.

Monroe Environmental offers mobile clarifiers and separators for these applications and any others where permanent installation is not feasible or desired. Our systems include:

The X-Flo Mobile Clarifier a highly optimized gravity separator which combines solids settling, oil separation, and sludge handling in a single, convenient mobile tank. Learn More

Vertical Plate Clarifier for an insulation manufacturer; with three pretreatment mixing tanks to clarify process water at specialty insulation manufacturing plant. The system included an integral sludge thickener and was rated for 750 GPM.

750 GPM Vertical Plate Clarifier with Thickener

66 GPM Deck Wash Clarifier for offshore drilling rigs solids, oils, and wastewater collection.

Low profile Horizontal Clarifier–Oil/Water Separator for offshore drilling rig deck wash solids/oil clarification.

Value-Added Engineering, On-Site, and Support Services

Monroe also offers a variety of engineering, assessment, evaluation, and design services to help engineers, operators, and plant personnel get the most out of their wastewater treatment systems.

  • Clarifier/Separator evaluations
  • API Separator evaluations
  • Settling test/jar testing
  • Treatability studies

90 ft. Riser Pipe Clarifier for secondary, biological, or flocculated solids which are more fluidized and have lower densities than primary wastewater and heavy industrial sludge.

Inspection of a 90 ft. Riser Pipe Circular Clarifier

VC-2500 661 GPM Monroe Vertical Clarifier with thickener to separate the cobalt hydroxide formed in wastewater at a PTA plan. Shown here are the launder, mixer, and drive access.
Auxiliary Equipment, Components, & Packaged Systems

In addition to providing water and wastewater clarifiers and separators, Monroe offers an array of equipment, components, and devices typically needed for enabling a complete turnkey installation. These include but are not limited to the following:

  • Control and instrumentation systems
  • Chemical storage and feed systems
  • Equalization and storage tanks
  • Dissolved air floatation
  • Sludge handling & dewatering systems
  • Filtration & polishing systems
  • Access platforms, ladders, stairways, and walkways
  • Pumps, piping, valves, and fittings
Mixers for Vertical Plate Clarifier. A flash mixer and flocculator tank are available pre-treatment options.

Spare/Replacement Part Supply

  • Stocked inventory of spare / replacement items; Monroe and others
  • On-demand inventories and deliveries
  • Expedited emergency replacement deliveries
  • And more
Learn More

3D rendering of a Solids Contact Clarifiers, the most common design for softening, turbidity reduction, metals removal, flocculation, sedimentation, and related functions. They may also be referred to as reactor clarifiers or flocculating clarifiers in some cases.
Technical and Engineering Support Services

  • Evaluations and troubleshooting of existing systems and problems
  • Assessments for new and replacement systems
  • Environmental permitting and compliance assistance
  • System sizing and general arrangement drawings
  • Mechanical, electrical and structural requirements
  • PLC programming and HMI interfacing
  • Cost estimating and budgeting
  • Testing and water quality analysis
  • And more
Learn More

Design and build 35 ft. Solids Contact to precipitate various metals at a specialty cold mill. The turnkey installation also included a 25 ft. Gravity Thickener.
Turnkey Construction Related Services

  • Equipment installations
  • Construction management and administration oversight
  • Startup and commissioning
  • Operator training and O&M manuals
  • Performance and compliance testing
  • And more
Learn More

Installation of a 30ft Thickener to treat solids at a mining facility.
On‑Site‑Services, Maintenance, & Repair

  • Annual/as-needed service and preventative maintenance
  • Emergency service, troubleshooting, and support
  • On-site servicing, adjustment, repairs, and replacements
  • Extended warranties
  • And more
Learn More

Industries Served

Pilot Horizontal Clarifier used on a rental basis to determine the chemical dosing requirements and settling characteristics of suspended and dissolved metals in an industrial wastewater stream

Rental, Pilot, and Testing Programs

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Resources & Literature

Recent Case Studies

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