Tanks, Structures and Components

Wastewater treatment plants contain various infrastructure, including wastewater bins and tanks, clarifiers and covers. These products, which also include products designed to maintain that infrastructure, will help treatment plant operators make sure their plants are in top condition.
Tanks, Structures and Components
Double-wall tank

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Bins/Hoppers/Silos

  pH neutralization package

The pH neutralization package from J.L. Wingert Co. includes a conical tank, tank stand, pump, programmable controller with display and all the necessary equipment to customize batching requirements. Units are automated and delivered ready for installation. Options include various communication protocols, data logging and remote monitoring. 714/379-5519; www.jlwingert.com.

  Anaerobic digestion system

The High Solids Anaerobic Digestion (HiSAD) System from Infilco Degremont is a two-stage system for treating high-solids organic wastes (20 percent solids or greater) without mixing. The system can achieve up to 75 percent solids removal at 15 days or shorter retention time. No mixing means operations and maintenance costs are kept low and return on investment improved. The system is resilient to changes in feed composition. 804/756-7623; www.degremont-technologies.com.

  Tension fabric building

Tension fabric buildings from Legacy Building Solutions incorporate structural steel beams that aren’t vulnerable to unseen corrosion, and have multiple coating options, including hot dip galvanizing, red oxide primer and powder coat paint. The design allows for wider doors than are possible with web truss, and added side doors. Structures can be modified to provide desired eave extensions and interior columns. They can also be engineered to handle additional loads for conveyors, sprinklers and other systems. They feature polyethylene fabric roofs, with a wide variety of PVC fabrics available, allowing natural light to permeate, while insulation can be added to meet energy codes when required. Sidewalls can be customized and built with any desired material, then lined to prevent corrosion. 877/259-1528; www.legacybuildingsolutions.com.

  Moving bed bioreactor

BioSphere Moving Bed Biological Systems from Siemens Water Technologies incorporate a biomass carrier into a moving-bed fixed-film process that provides a protected, extremely high surface area environment for biofilm growth. That increases capacity by 200 percent or more and ensures compliance with tightening permit limits, all within the existing plant footprint. The system is suited for plant upgrades, retrofits or expansions. It can remove BOD5 to less than 5.0 mg/L and total nitrogen to less than 3.0 mg/L. 866/926-8420; www.water.siemens.com.

  Fiberglass sump and sewage basins

Fiberglass sump and sewage basins from TOPP Industries are manufactured to ASTM D3753 and offer inside diameters from 18 to 120 inches (other diameters available on request). Basins are available in heights to meet specific applications; one-piece tanks are available as deep as 35 feet. The 96-inch-diameter basins provide capacities from 3,008 to 7,520 gallons, while the 120-inch-diameter basins hold 4,700 to 11,750 gallons. 800/354-4534; www.toppindustries.com.

Clarifiers/Components

  Container filter

Sludge Mate container filters from Flo Trend Systems can dewater a variety of materials such as alum, ferric, biosolids, septage, grease trap waste and slaughterhouse waste. A closed-system design controls odor, prevents spillage, reduces maintenance and protects against the elements. The units have 10-gauge reinforced walls and seven-gauge carbon steel floors. The filters produce cake that passes the paint-filter test; material can be transported straight to landfills. The units are available in roll-off, trailer-mounted, and tipping-stand-mounted styles. Capacities range from 5 to 40 cubic yards. 713/699-0152; www.flotrend.com.

  Microsand clarifier

The ACTIFLO clarification process from Kruger USA combines microsand-enhanced floc formation and settling. The process treats low-turbidity runoff, reservoir water with algae, water with high total organic carbon, hard and soft water, groundwater, river and stream water, brackish water and seawater. The process uses microsand as a seed for floc formation and as ballast. The sand-ballasted floc allows for clarifier designs with high overflow rates, short retention times and small footprints. The process can be used in applications that include treating wet weather flows, phosphorus removal and water reuse. 919/677-8310; www.krugerusa.com.

  Solids-contact clarifier

Hi-Tech solids-contact clarifiers from Kusters Water are used for water and wastewater treatment applications including raw water intake, turbidity removal, cold lime softening, metals removal and other types of high-rate clarification. Collectors and drives in various styles meet job-specific requirements. 800/264-7005; www.kusterswater.com.

  Solids-contact clarifier

The CLAR-I-VATOR high-rate solids-contact clarifier from Smith & Loveless provides economical and efficient chemical precipitation. It combines flash mixing, flocculation, clarification, sludge collection and sludge thickening in one operation. Diameters range from 10 to more than 100 feet, with half-bridge and full configurations. Tank design options consist of concrete, mild steel, stainless steel and non-metallic. Full upgrades and retrofit options for drive heads, scum skimmers, baffles and weirs are available. 800/898-9122; www.smithandloveless.com.

  Drop-in rental clarifier

UniPure rental clarifiers suit facilities facing temporary shutdowns of clarifiers for maintenance or upgrades. Units can be leased by the day, week or month. Combined with an open-top tank, the drop-in system provides all the treatment capabilities of permanent clarifiers. The mobile host tank reduces transportation costs and ensures that units are delivered ready to operate. They can be dispatched in days, and online in minutes. 877/864-7873; www.unipure.com.

  Drive unit

Drive units from WesTech Engineering are delivered as a single, completely assembled and shop-tested unit, ready to be installed on the thickener or clarifier center column. They offer flexibility of design that allows the engineer to select a drive that closely matches the process and mechanical requirements. 801/265-1000; www.westech-inc.com.

Clarifier/Digester/Tank Cleaning

  Sludge removal system

The SedVac sludge removal system from Brentwood Industries cleans the sedimentation basin floor, removing solids without clogging. Its header is designed to engulf and funnel the sludge blanket to the discharge hose. Powered by cable-driven technology, the vacuum can operate daily or continuously, eliminating downtime for manual cleaning. 610/263-1100; www.brentwoodindustries.com.

Coatings and Linings

  Non-structural spray lining systems

Ecodur PGC (plasticized gypsum coating) systems from Colorado Lining International protect against chemical and gas corrosion. It withstands extreme levels of hydrogen sulfide and other corrosives in water and wastewater. The single-coat material is 100 percent solids and VOC-free. It provides strong adhesion and high-build capacity, and is NSF 61 compliant. 800/524-8672; www.coloradolining.com.

  Weather barrier

ENESEAL MP single-component, water-based, ultra-low viscosity weather barrier from ENECON Corporation dries to an invisible, water-repellent seal. It protects virtually all types of concrete, masonry and mineral surfaces, forming a hydrophobic barrier inside pores that repels water and water-borne salts, thus preventing surface scaling, freeze-thaw cracking and corrosion of reinforcing steel. This barrier is breathable, allowing water vapor to escape while reducing liquid water penetration into the substrate. 888/436-3266; www.enecon.com.

  Industrial coating

PERLASTIC asphalt-based, polymer-modified linings from Global Polymer Solutions protect concrete, steel, ductile iron, aged FRP and other substrates. They are applied in spray, brush, roller, or trowel-grade formulations. They add corrosion- and chemical-resistant protection to tanks, pipelines, manholes, containment areas, processing equipment and facilities in all types of environments. They can be installed directly to rust without sandblasting or extensive surface preparation. They are 100 percent solids and VOC-free. 800/933-1031; www.perlastic.com.

  Tank lining

International Paint’s Devoe Bar-Rust 234P solvent-free epoxy, low-temperature tank lining system meets the industry’s need for low-VOC compliance. The 100 percent solids, high-build tank lining system suits new construction and rehabilitation with fast cure, a 2:1 mixing ratio and single-coat application capability. It carries NSF/ANSI 61 certification and cures to a hard, high-gloss finish for a safe, clean and maintenance-free installation. The system is applied with a plural airless sprayer. 877/234-5268; www.international-pc.com.

  Polyurea tank lining

Rhino Extreme 11-50 rapid-curing polyurea tank lining from Rhino Linings is designed to reduce facility downtime and withstand moisture, humidity and low temperatures even during application. It bonds to virtually all substrates, including metal, wood, concrete, fiberglass and geotextiles. It creates a monolithic, impermeable lining with elastomeric properties that allow application to surfaces subject to vibration, expansion, contraction, movement, flexing, abrasion and impact. 800/422-2603; www.rhinoliningsindustrial.com.

  Clarifier trough coating system

The Sher-Release silicone fouling release system from Sherwin-Williams Protective & Marine Coatings creates a hydrodynamic surface with three layers — an epoxy anti-corrosive base, an elastomeric coating and a silicone topcoat. The material is non-toxic and low-VOC. It allows soft, fouling-like algae to be released from the surface with light water pressure, such as water jets, while maintaining adhesion, abrasion resistance and scratch resistance. It can be applied with standard airless spray equipment. 800/524-5979; www.sherwin-williams.com/protective.

Covers/Domes

  Filter cover

The Defender filter cover from Environetics prevents algae growth, contains odor and maintains operating temperatures. Opaque covers block UV light, prohibiting algae growth to keep filters clean. The mechanical attachment system provides a positive seal for effective odor containment. Low-profile design minimizes internal volume, reducing odor treatment requirements. Covers isolate thermal air masses to maintain operating temperatures and eliminate freezing. Modular construction enables rapid installation. 815/838-8331; www.environeticsinc.com.

  Floating disc cover system

The LemTec Hexa-Cover from Lemna Technologies adapts to any pond or tank and offers odor, algae and evaporation control and heat retention. It incorporates hexagonal discs made of recycled polypropylene with interlocking edges and a buttressed profile that allows for self-leveling, adjustment and dispersion, ensuring maximum surface area coverage in all conditions. It installs with minimal time, cost and equipment, and incorporates discreet discs that distribute themselves across the water surface to accommodate any basin equipment, piping or water level fluctuations. 612/253-2000; www.lemnatechnologies.com.

Digesters

  Grit separator

Full Circle Vortex grit systems from Envirodyne Systems have 360-degree designs that use a Hercules drive. They allow for in-line entry and exit and can accommodate varying flows, low headlosses and coarse to fine grit removal. They have no submerged parts and a small footprint, are energy efficient and use grit with low organic content. Laminar flows are introduced tangentially into the grit chamber and are directed along the outside of the tank by an inlet baffle into a rotational current. A mechanized impeller forces a vortex, creating a shear zone, which separates lighter organics from heavier grit. An outlet is provided in-line, but at a higher elevation to prevent short-circuiting. Grit collects towards the center of the tank, where it settles into a lower grit storage hopper. Water and air scour lines or mechanical means can be supplied to fluidize the grit, and further scrub organics. 717/763-0500; www.envirodynesystems.com.

  Aerobic digester

The GR and GRO digester systems from Schreiber apply a continuously sequencing reactor (CSR) process to provide high-efficiency aeration and separate low-energy
mixing for aerobic sludge stabilization and gravity thickening. Using a dual GR system allows one unit to serve as an aeration/clarification unit and one to be used as a digester/thickener. The unit incorporates sludge stabilization and thickening within a concentric basin arrangement for efficient space utilization. Peripheral drive helical scrapers transport the thickened sludge to a central hopper for withdrawal for dewatering or recirculation. The thickener can be converted to function as a clarifier. 205/655-7466; www.schreiberwater.com.

Doors/Hatches

  Quick-opening manway

Quick-opening manways (watertight doors) from Chase Associates provide access to concrete and steel tanks and can be installed in new construction or retrofitted. They provide safe ground-level tank access during tank construction and quick, secure entry over the life of the completed tank. In-swing styles seal an ASME flanged and dished cover against a liquid-tight, replaceable gasket. A handwheel release operates only when the tank is empty and provides access within seconds without tools. Out-swing styles secure an ASME cover with threaded hand knobs. Security covers are available for tanks in public locations. Units are available in mild steel, stainless steel and other alloys. 888/626-9297; www.manways.com.

  Sealing slide gate

The Model MU four-sided sealing slide gate from Orbinox provides highly versatile flow control for wastewater treatment plants. The leakage rate is 50 percent or less of the maximum recommended by AWWA under normal conditions. It is available in larger sizes for more demanding conditions. The design of the body and seat assures non-clogging shutoff on suspended solids in industries such as pulp and paper, power plants, wastewater treatment plants, chemical plants, food and beverage plants, bulk handling and mining. 450/622-8775; www.orbinox.com.

Grating/Handrails/Ladders

  Handrail and ladder system

Dynarail handrail and ladder systems from Fibergrate Composite Structures are easy to install. Components are lightweight and easy to fabricate. They include everything needed to install OSHA- and IBC-compliant horizontal and inclined handrail systems with two or three rails. Specialty picketed handrail systems are available. Other options include ladders, standard walk-throughs and safety cages, including a retractable walk-through for applications such as manholes, pits or indoor roof access points where covers are used. 972/250-1633; www.fibergrate.com.

Skimmers

  Stainless Steel Skimmer

The Alpha stainless steel skimmer from Megator removes wastewater scum from aeration tanks. Made of stainless steel, it can handle aggressive liquids at varying depths and concentrations. It has a lightweight design with one-man operation, an adjustable intake weir, a tri-float design for stability and a shallow draft that enables it to operate in as little as 12 inches of water. The skimmer can be arranged for gravity flow in new construction, while complete recovery units are used for existing tanks. 800/245-6211; www.megator.com.

Tanks

  Double-wall tank

Cylindrical double-wall tanks from Assmann Corporation eliminate chemical spills without the expense of lined concrete containment. The molding process provides a heavier-top sidewall and dome to prevent dome collapse, while a primary inner tank and a secondary locked-on outer tank ensures against chemical spills. Constructed of molded high-density crosslinked polyethylene or FDA-compliant linear polyethylene, the outer shell containment equals 120 percent of primary tank capacities, exceeding EPA standards. The dome on the inner tank interlocks with the outer tank’s sidewall, sealing the secondary containment area and preventing debris and snow from entering, making the system ideal for outdoor storage. The double-wall design also prevents cross contamination of contents. They are available in 20- to 6,550-gallon sizes. 888/357-3181; www.assmann-usa.com.

  Stainless steel tank

Stainless steel tanks from Boerger are used in the biogas industry as primary and secondary digesters and as equalization or storage tanks. The tanks are fixed to a concrete foundation using anchor bolts with sealing compound. They can be customized to meet specific needs, with capacities from 8,000 to 1.3 million gallons. They can be built high and narrow or low and wide. If more storage space is required in the future, additional ring segments may be added. Tanks can also be easily dismantled and rebuilt elsewhere. Options include ladders with safety cages, stairways and platforms, tank covers, tank connections and flanges, tank access and manways.  612/435-7300; www.boerger.com.

  Prestressed concrete tank

Wire-wrapped prestressed concrete storage tanks from Caldwell Tanks are economical units constructed to meet the requirements of AWWA D110 and ACI 372. They are a low-maintenance choice for a variety of applications, including potable water, municipal and industrial wastewater and thermal energy storage. 502/964-3361; www.caldwelltanks.com.

  Mix tank

Mix tanks from DEL Tank & Filtration Systems are available in horizontal and vertical configurations in sizes from 1,000 to 33,000 gallons. They can hold up to 20-pound-per-gallon fluids using four 10 hp explosion-proof mixers. With a round bottom and smooth 1/4-inch-thick walls, the bullet-style tanks promote uniform solid suspension and mixing that nearly eliminate build up. 800/468-2657; www.deltank.com.

  Storage tanks

AWWA Standard D110 prestressed concrete storage tanks from DN Tanks are made using a cylindrical concrete wall placed in permanent compression. AWWA D110 Type I tanks are constructed using a cast-in-place concrete wall, horizontal strand prestressing and vertical post-tensioning. AWWA D110 Type III tanks are constructed using precast concrete walls, with an embedded steel diaphragm. The tank wall is also placed in permanent compression, accomplished by horizontal wire-wound prestressing. Either tank type can be built with roofs constructed as clear span, freestanding concrete domes, or with column-supported, conventionally reinforced flat slab roofs. Capacities range from 80,000 to 50 million gallons. 800/826-8306; www.natgun.com.

  Folding frame tank

Folding frame tanks from Husky Portable Containment are available in steel or aluminum frames (single or double fold) with several size and material options. They are suited for potable or wastewater storage and firefighting. Easy-lift handles are standard. The folding frames are also pinch-free, meaning no added pieces to get in the way. 800/260-9950; www.huskyportable.com.

  Portable storage tank

Watertight, insulated T-Max tanks from Orenco Systems are portable, long-lasting, chemical-resistant fiberglass storage containers in capacities from 300 to 15,000 gallons. Standard tanks come in 14- to 42-foot lengths, weigh 4,000 to 12,000 pounds, and are 7.5 feet wide by 8.5 feet high. Custom sizes are available. Molded in a single piece using the vacuum infusion process, they are constructed of 4-inch-thick foam-cored fiberglass walls. The vacuum infusion process produces void-free, high strength fiberglass laminates and allows for encapsulation of foam core, providing an insulation value of R-24. 800/348-9843; www.orenco.com.

  Rolled, tapered panel bolted tank

The RTP (rolled, tapered panel) bolted tank from Tank Connection Affiliate Group is made to exact tolerances with sidewall plate thickness up to 1/2 inch. No external reinforcement webbies/web stiffeners are required; field construction is accomplished using a synchronized hydraulic screw jack process that keeps crews on the ground. Tanks are available in capacities up to 8 million gallons. 620/423-3010; www.tankconnection.com.



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