Industrial Waste Water Treatment

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SLANT PLATE CLARIFIER 14

Slant Plate Clarifier Model SPC

Pan America Environmental manufactures Slant Plate Clarifiers, commonly referred to as inclined plate clarifiers. The SPC Series Slant Plate Clarifiers are designed for settling solids and precipitated metals. The compact SPCs are designed with many features and options to provide engineers, system integrators and end users with convenience and flexibility in system integration choices. Customization & modifications are available.

Chemical pretreatment is typically used to improve contaminant removal. Model sizing is based on the product to be removed, flow rate and other application parameters. We offer many sizes up to 3300 square feet and many types of chemical pretreatment systems to settle solids metals and other products requiring settling. Lamella plate clarifiers are a proven technology with wide application.

Customization & modifications to fit your project needs are offered.

icon-pdfView SPC Slant Plate Clarifier Brochure

Pan America Environmental manufactures the Slant Plate Clarifier, commonly referred to as inclined plate clarifier and lamella clarifier. The SPC Series Slant Plate Clarifiers are designed for settling solids and precipitated metals. The compact SPCs are designed with many features and options to provide engineers, system integrators and end users with convenience and flexibility in system integration choices. Customization & modifications are available.

Chemical pretreatment is typically used to improve contaminant removal. Model sizing is based on the product to be removed, flow rate and other application parameters. We offer many sizes up to 4000 square feet and many types of chemical pretreatment systems to settle solids metals and other products requiring settling. Lamella plate clarifiers are a proven technology with wide application.

Customization & modifications to fit your project needs are offered.

Products removed:
• Scrubber water solids
• Coal fines
• Fluoride removal
• Phosphate removal
• Bottom ash
• Vegetable processing
• Filter backwash water
• Solids and turbidity from surface water
• Mill scale
• Cooling tower blow down
• Heavy metal precipitation
• Textile stone washing
• Abrasive polishing
• Paint booth solids
• Food grade starch

CRT Series Chemical Reaction Treatment Systems
Chemical preconditioning of the wastewater is often required. Pretreatment systems are typically provided as gravity flow systems from the inlet of the chemical treatment system through the outlet of the clarifier. The pretreatment system can be one, two or three stage process design.

A variety of chemical pretreatment systems can be provided to condition your wastestream to assist your Slant Plate Clarifier in increasing it’s settling efficiency.

 

Specifications

Specification Summary:
System model
Number of model sizes
Process  types
Volume range offered

Design Specification Summary

Performance
Design criteria
Influent chamber
Separation chamber
Solids hopper
Clean water effluent chamber
Water baffle
Weir plate
Oil skimmer
Oil reservoir
Settling pack
Cover
Fittings
Base
Lifting lugs

Materials of Construction

Tanks
Piping
Testing
Surface preparation(steel)

Coatings (steel)

 

Standards used

SPC Slant Plate Clarifiers
Lamella design clarifiers
33
TSS settling
5 – 3000 GPM

 

TSS: 5-20 Metals: 0.5-2.0 (mg/L)
Inclined plate / Lamella plate theory
Influent diffuser or overflow weir
To contain Slant Plate Packs (SPP)
Located under separation chamber and SPP packs
Located after separation chamber
Water flows over this baffle to exit tank
Vertical weir plate to maintain operating water level
Optional
Optional
Single or multiple, Wave Plate or flat plate separation packs
Multiple section vapor retaining, gasketed with polyethylene gasket and attached via zinc plate fasteners
NPT couplings up to 3″, 4″ & larger: 150# ANSI B16.5 FF flange
Steel skid base of channel, beam or tube construction
(4) Minimum, located at lifting points on sidewalls of tank

 

A-36 carbon steel, 304/316 SS, polypropylene
A-53 black steel, 304/316 SS, FRP,PP
Dye penetrant on steel construction
Interior surfaces shall be prepared to an SSPC-SP10 near white metal blast. Exterior surfaces shall be prepared to an SSPC-SP6 commercial blast.
Interior coating shall be coated with Ameron High Build Coal Tar Epoxy Amercoat 78HB (16 mils DFT).
Exterior coating shall be coated with Ameron epoxy primer, Amerlock 2, (5-8 mils DFT).  Final coat to be Ameron Amershield Aliphatic Polyurethane Enamel coat (5 mils DFT)Surface color to be Green RT-2203.
Elements of AWS D1.1/1.1M, API, API-650, API-421, ANSI, IEC,AWS D1.6, UL, UL-508,UL-845,SSPC,ASME, CSA, NEMA, NFPA79, NEC

Slant Plate Clarifier Operational Theory

Slant Plate Clarifiers: Are passive, physical separation systems designed for settling of solids that are denser than water through the implementation of lamella plate theory, under which Slant Plate Clarifiers and inclined plate clarifiers operate.

Settling Process: The water/solids mixture enters the SPC inlet, is immediately dispersed via a diffuser that reduces the velocity and turbulent flow into the influent chamber that further reduces the velocity and begins the settling process. The flow exits the bottom of the influent chamber and is diverted into a horizontal path and then begins a vertical path through the Slant Plate Pack where a series of settling plates are bound together in a settling pack. As the flow enters the pack the solids encounter the plates and stop their vertical motion by hitting the plates in their path. Once they hit these plates the solids fall downward to the plate surfaces beneath them and then slide down these plates, ultimately settling to the bottom of the sludge chamber.

In a Lamella plate type design a counter-current flow develops within the Slant Plate Pack where the flow rising upwardly through the plate pack passes over the solids as they slide down the plates in the opposite direction.

The settling or prediction of a particle’s ability to settle can be described by Stokes Law, wherein the particle density, the fluid it is part of and the time it takes for that particle to settle a certain distance in a period of time can be determined. The Lamella concept shortens this period of settlement time by interrupting the particle path with a surface area that forces it to stop and reverse it’s direction due to density differential between it and the carrier fluid.

Stokes Law: This equation relates the terminal settling or rise velocity of a smooth, rigid sphere in a viscous fluid of known density and viscosity to the diameter of the sphere when subjected to a known force field (gravity). The equation is:

V = (2gr²)(d1-d2)/9µ
where
V = velocity of rise (cm sec-¹),
g = acceleration of gravity (cm sec-²),
r = “equivalent” radius of particle (cm),
dl = density of particle (g cm -³),
d2 = density of medium (g cm-³), and
µ = viscosity of medium (dyne sec cm-²).

Slant Plate Pack: The Slant Plate Pack is designed to rest at a 55°angle giving the plates an optimum angle for settling. The Lamella concept is simply the relocating of an equivalent surface area available in a large, open tank to the surfaces of numerous plates in contact with the wasteflow, the Slant Plate Clarifier tank size can be reduced considerably when compared to a conventional clarifier. The projected, surface area is equivalent to the surface area of an equally sized circular clarifier.

The plates provide a projected, horizontal surface area. This projected area demonstrates the area available for settling.

Models

SPC-12
SPC-20
SPC-40
SPC-60
SPC-80
SPC-120
SPC-170
SPC-240

SPC-330
SPC-440
SPC-550
SPC-660
SPC-770
SPC-880
SPC-990
SPC-1100

SPC-1320
SPC-1520
SPC-1760
SPC-1980
SPC-2200
SPC-2420
SPC-2620
SPC-2860
SPC-3080
SPC-3300

Influent Feed System

Air operated, diaphragm pump with air controls or progressive cavity, centrifugal or electric diaphragm pumps are offered, sump level switches & Nema 4 control panel, skid mounted, 115/230/460V power offered.

Effluent Pumpout

Centrifugal pump with level switches & Nema 4 control panel, base mounted or tank mounted, 115/230/460V power offered. An external pumpout tank is included.

Sludge Pumpout System

Air operated, diaphragm pump with air controls & Nema 4 control panel, auto on/off timer, tank mounted, 115V/1ph/60Hz power req’d. Electric pumps available: electric diaphragm, progressive cavity or other pump type. 1 – 100 GPM

Freeze Protection

Immersion heaters mounted through tank wall. Each heater has an independent thermocouple well, 30-60 deg. F thermostat and Nema 1 (or optional Nema 4 or 7) housing. 230/460V/3ph/60Hz power. Centralized master control panel can be provided (standard on large systems). Explosion proof systems also offered.

Cover

Multi-sectioned tank cover with section handles, gasket seal and attaching hardware to vapor seal the tank head space.

Elevation Platform
Epoxy coated steel platforms or leg extensions to elevate tank to desired level can be provided.

Walkways

Walkways can be provided for full or partial SPC tank length to facilitate access to the tank top and internals. Handrails, self-closing safety gates are provided. Ladders or stairs are provided in conjunction with the walkway. A variety of materials can be provided for construction such as: coated carbon steel, stainless steel, FRP or aluminum. Designs are per OSHA standards.

Alarms

High effluent, influent and other alarm systems can be provided as stand alone or in combination with other options to indicate high, low or other conditions and trigger audible and/or visual indicators.

External Storage/Feed Tanks

A wide variety of tank volumes can be supplied for your water and sludge holding needs. Flat bottom and cone bottom designs constructed in polyethylene, fiberglass, steel & stainless steel can be provided.

Effluent Filter Systems

Solids filter systems can be provided to remove light loads of filterable solids from the SPC effluent. Contact Pan America to determine proper filtration needs for your application.

AQAM Filter Systems

AQAM (Alkyl Quaternary Ammonium Montmorillonite) filter systems can be provided to remove trace hydrocarbons, sheens, DNAPLs, slightly soluble chlorinated hydrocarbons and high molecular weight organics from the SPC effluent. Contact Pan America to determine proper filtration needs for your application.

Emulsion Cracking Systems

Emulsion cracking systems can be provided to remove oil-in-water emulsions prior to the SPC. Contact Pan America to determine proper system needs for your application.

Chemical Reaction Treatment Systems

Chemical treatment systems can be provided to coagulate, flocculate, reduce (and other process types) the wasteflow prior to the SPC. Contact Pan America to determine proper system needs for your application.

pH Adjustment Systems

pH adjustment or pH neutralization systems can be provided to maintain pH levels prior to or after the SPC. Contact Pan America to determine proper system needs for your application.

Solids Contact Recycle

Where light loadings of solids or other materials hinder rapid or complete chemical pretreatment. Solids from the sludge chamber can be directed back into the chemical treatment system to assist chemicals in building flocc by bulking up the solids.

Sludge Dewatering

Sludge from the SPC can be dewatered via a filter press or other dewatering device. Contact PAE for system dewatering requirements.

Carbon Filtration Systems

GAC carbon filters can be provided to remove contaminants after the SPC. Contact Pan America to determine proper system needs for your application.

Applications

– Plating shops
– Produced water
– Manufacturing plants
– Textile stone wash
– Surface water pretreatment
– Petrochemical plants
– Metals processing plants
– Steel mills
– Scrubber water
– Cooling tower blowdown
– Drinking water pretreatment
– Drinking water treatment
– Power plants

Metals Removal Performance

Following the precipitation/flocculation stages if the particulate settle then a Slant Plate Clarifier is required. The Slant Plate Clarifier is the device of choice and will provide the following typical settling performance:

SPC discharge (mg/L)
TSS: 5-20
Metals: 0.5-2.0

Metal Reduction Precipitation Form
Units of concentration: mg/L

Arsenic: .005 Ferric hydroxide
Barium: .50 Sulfate
Cadmium: .05 Hydroxide
Copper: .02-.07 Hydroxide
Mercury: .001-.01 Alum. co precip
Nickel: .12 Hydroxide
Selenium: .05 Sulfide
Zinc: .10 Hydroxide


Pan America Environmental, Inc
2309 N. Ringwood Rd., Ste G, McHenry, IL 60050 USA
815.344.2960   •   panam@panamenv.com