Ashbrook Simon-Hartley has been providing water and wastewater treatment solutions for decades-with its roots reaching back to the early days of the 20th Century. Through the years, the company has advanced on all fronts and has been consistently recognized as a leader in innovation, engineering quality and end-user value.
Today, Ashbrook Simon-Hartley is very much an environmental business providing products, services and solutions that deliver clean wholesome water and remove the waste from wastewater in ways that minimize impact on the environment.
Across the globe Ashbrook Simon-Hartley solutions are also playing a key part in countries' economic growth enabling them to meet the demands of growing populations and rapid commercial, industrial and infrastructure development.
Ashbrook Simon-Hartley is a global company with operations on four continents and customers around the world. Major service hubs are operated in the U.S., the U.K., Dubai, and Chile, with local and regional representation in virtually every part of the world.
Process Systems
Ashbrook Simon-Hartley's process capabilities draw on a comprehensive range of technologies to create effective and efficient solutions for water and wastewater treatment applications. With over 2,000 industrial and municipal installations, ISO 9001 certified Ashbrook Simon-Hartley has the experience to provide high performance, quality solutions.
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Ultra-Violet Disinfection: The reliability of Simon Hartley Quay UV microwave lamps brings significant operating cost savings. Simon Hartley Quay UV bulbs last at least three times longer than low or medium pressure lamps and a minimum life of 3 years is guaranteed. Replacement cost is also significantly less, so the Simon Hartley Quay UV system is by far the most cost-effective technology for wastewater or potable water disinfection.
Simon Hartley Quay UV microwave technology combines the advantages of low and medium pressure bulbs into one electrode-less lamp. The result is low temperature, high output operation with much greater reliability and substantially reduced disinfection costs:
- Instant light - microwave power is instant - no warm up period
- No fade - constant performance throughout lamp life, no tailing off with ageing
- High output - only a third of the number of lamps of a low pressure system
- High Intensity Low pressure - peak emission at 245nm for germicidal disinfection efficiency
- Cool running - no baking on of residues, simple cleaning, no cooling required
- Long Life - guaranteed 28,000 hours, expect 5 years
SBRs can be thought of as an activated sludge system, which 'operates in time rather than in space'. By replacing the three separate steps of clarification, biological treatment and settlement with a timed sequence in a single basin, the footprint required is significantly reduced.
Compared with a conventional plant it also offers the flexibility of control to accommodate varying flows and influent quality. The timing of any step in the process - fill, aerate, settle, decant - can be adjusted at any time to cater for such variations and meet effluent discharge requirements.
Unique to the Ashbrook Simon-Hartley system is the SBR plus decanter's V-Notch Weir positioning technology that prevents solids and scum entering the final effluent decanted away from the basin. V-Notch Weir technology incorporates the rugged three-way multi-jack for infinite decanter positioning control.
Decanter sizes from 68 m3/hr to 1,590 m3/hr are available, multiple decanters can be used where higher decant rates are required.
Package Sewage Treatment: Packaged sewage treatment plants combine all the steps of a conventional treatment plant in a containerized enclosed unit. Typical applications are remote areas serving small populations where they offer a far more cost-effective solution than construction of conventional plants.
A range of sizes is offered to cater for flows from 11.4 m3/day (46 p/e) to 380 m3/day (1,500 p/e). The standard design of the packaged sewage treatment plant allows the system designs to be tailored to suit the clients application.
Packaged sewage treatment plant options include:
- Tanks - surge or sludge holding tanks
- Anoxic retention time
- Aeration time
- Disinfection - tablet chlorinator or UV
- Tertiary treatment filters
Various sewage treatment processes can be incorporated into the standard packaged sewage treatment plant, for example:
- Conventional activated sludge
- Sequencing Batch Reactor
- Membrane Bio-Reactor
- Moving Bed Bio-Reactor
Membrane Bio-Reactor: Integrated Membrane Activated Sludge (IMAS) Technology
Membrane Bio-Reactors, which do away with the need for a final clarifier and the space it takes up, are increasingly being used to bring down the size of sewage treatment plants and improve the quality of effluent produced. Whereas conventional MBRs use direct immersion, the IMAS process maintains separate biological and membrane processes to eliminate fouling problems and associated high-energy consumption.
With IMAS the biological and membrane processes are individually controlled and optimized:
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Pre-membrane particle management - located in the reactor tank reduces the level of MLSS (Mixed Liquor Suspended Solids) reaching the membrane by 90%. This in turn reduces the membrane area required.
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Ultrafiltration (UF) membranes - in a low fouling environment allows for low resistance properties to enable much higher flow rates and less process down time due to fouling.
IMAS MBR - Membrane quality effluent with
- Reduced screening - 6mm screens significantly reduce screenings and disposal issues
- No MLSS recirculation pump
- No air scour blower pump
- 65% less membrane area compared to conventional MBR
- 85% less energy consumption
- No oversized blowers - efficient oxygen transfer
- No operator training issues
- Smaller equalization basins
