HAIGH ENGINEERING COMPANY LTD.

ACE Screeners

• High Performance screening & screening handling
• Water Efficient with no washwater
• Flexibility built in as standard Backed Up with Haigh product support
• Ideal For Sewage Treatment Works & Waste Water Treatment

Haigh’s range of seven ACE Screeners cover inlet flows from 0-100l/s and are designed specifically for use in smaller waste water and sewage treatment works, typically populations up to 10,000.

Installation flexibility is a key attribute, allowing project designers to use an ACE Screener in virtually any situation; Retrofit into existing civil structures, new build channels, or as pipeline sections.

An ACE Screener is a combined screen and screenings handling plant, compliant to WIMES (Water industry mechanical and electrical specification). A perforated plate screen provides effective screening, screening washing followed by compaction using the unique LISEP / Lipactor.

Screeners make inlet screening for small works cost effective, not just during initial procurement but through the whole life of the Screener. Savings continue to accumulate as there are no wash water costs.

Engineers often use step screens where installed headloss is an issue, where headloss with spiral sieve screens is too high. But step screens offer limited screenings capture ratios. Engineers often use spiral sieve screens for higher capture rates than step screens or bar screens, but spiral sieve screens have limited screening effectiveness.

Haigh’s ACE Screener has proven very low installed headloss similar to, and often lower than step screens, and screenings capture rates higher than spiral sieve screens. Engineers can have both hydraulic and screening performance. Screenings are reduced by Liseps so bins are lighter and easier to handle. They are emptied less often and all done without washwater, washwater pumps, associated problems of reliability or the ongoing cost of potable water supply.

Benefits of ACE SCREENERS

Zero washwater - One of the great advantages of the ACE Screener is that it requires no washwater whatsoever. Often the cost of potable or piped in water is not included in the whole life cost of an installation, when up to 70 tonnes of water are used by some competitor products per day. The capital cost of a screener can soon be recovered.

Low volume screenings - Screenings are an unavoidable but unwanted by-product of sewage treatment so at Haigh we design our equipment to produce the minimum screenings residue by putting as much of the organic material back into the flow. The small amount of residual solids left over is then dewatered, compressed and dried.
The original screenings volume is reduced by over 95% so bin and skip use is considerably reduced.

Maximum organics returned to treatment – Organic material removed from the flow are a problem so ACE Screeners are designed to keep them there where they can improve downstream processes and limit residual solids to less than 5% of the original screened material. The resulting end product screenings are cleaner, lower in odour and are easier to dispose of.

Applications of ACE Screener

Problem - Bio Reactors not performing correctly due to organic starvation caused by poor screenings handling at headworks.
Solution - Install an ACE Screener which will wash and scrub out over 95% of organics and return them to the works where they belong to improve performance and final effluent quality.

Problem - Traditional compactors, with or without spray washing systems still put considerable volumes of faecal and other organics into skips or bins.
Solution - Liseps return over 95% of organics back to treatment, improving the quality of sludges and final effluent. It also means binned screenings are cleaner.

Problem - Compactors and washers are inflexible for remote siting of dewatering and solids separation.
Solution - ACE Screeners carry the solids in suspension via pipework up to 50 metres long allowing the most convenient positioning of the Lisep for collection and transport.

Sales and Service

Haigh has a UK wide dedicated sales force who specialize in knowing how to bring added value to your works such as reducing civil costs, eliminating washwater, and at the same time cutting screenings skip and transport costs. Your local Sales Manager will be pleased to discuss your particular requirements and options for Haigh equipment to suit your works. If you decide to proceed with a Haigh installation a dedicated Contracts Engineer will be appointed to your project to oversee it from start to finish. Most new or existing installations will also require some kind of design input for layout and services positioning and the in-house design team will produce bespoke drawings for approval. Additional Nationwide service backup is available to keep your installations working throughout its life at optimum efficiency. Service Contracts can be arranged to periodically check equipment and advice on preventative maintenance. We endeavor to keep your Haigh equipment working at optimum performance, cost effectively for years to come. Haigh has a purpose built factory with the latest technology. Computer aided design and three dimensional modeling is complemented by sheet steel laser cutters, precision folding and robotic welding.

LISEP Packages

LISEP PACKAGES: HUGE VOLUME REDUCTION, WORKS WITH ANY SCREEN, CLEAN PROCESSED SCREENINGS, MAXIMUM ORGANICS TO TREATMENT AND EASY UPGRADE

LISEP packages process screenings from raw sewage flows. The efficient and effective process, takes raw screenings combined with a launder flow, washes and separates out the faecal matter and compacts the remaining screenings as a relatively clean and dry product ready for disposal by skip.

LISEP (liquid separator) Packages return the vast majority of faecal organic matter back to the main sewage flow for biological treatment, generating better sludges and preventing the starvation of biological filters.

LISEP packages can be used in conjunction with any screenings handling system fine or coarse. The modular design concept allows designers to integrate the package into any screenings handling site topography, placing the skip where it is most convenient. Haigh understands the implications of `whole life cost` (WLC) for operators and owners. With this in mind, the LISEP package optimises 'whole life savings' as a result of the process. Skip movements and the costs associated with disposal, by landfill, incineration, or other methods, are often the most significant costs in the day-to-day running of a sewage treatment plant. These costs are often neglected when selecting equipment; they can dwarf traditional WLC parameters. The substantial volume reduction achieved by LISEP packages means fewer skip movements and consequently lower whole life costs when compared to other systems. With increasing landfill costs and the legislative framework getting tougher the savings can only increase. Whole life savings equate to faster payback on capital spend.

Cost savings:
Lisep Packages reduce the volume of wet screenings by 90% without compacting - This is double the reduction offered by washing and compacting systems compared with competitor published data. So skip removal and disposal costs are halved. With Lipactors fitted the volume is halved again.

Layouts and Orientation:
LISEP packages are designed with two modules. A washing stage and a liquid separator / compacting stage. Washed and homogenised screenings are pumped from the washing stage to the liquid separators. This allows for a more convenient location of the skip without extensive launder or conveyor systems to carry wet screenings from the screen to the screenings handling plant. A myriad inlet works and building layouts can be accommodated using duty, duty standby or assist operating configurations.

Un- compacted Screenings:
Some installations may not need to take full advantage of the volume reduction offered by the compactors. For these applications, the compacting element can be left off the scope. The screenings handling plant will still be of the same clean quality but would be deposited as moist confetti in the skip.

Grit Capable:
Fine screens located upstream of traditional grit traps will invariably draw out grit as stones or fine grit out of the raw sewage flow. LISEP packages are designed to cater for grit, minimizing the impact on the operation and reliability of the plant. Automatic grit removal from the conditioning tank is available, or a manual solution exists for less grit prone sites via a bund.

Control Systems:
LISEP packages are designed to run automatically given a standard set of operating principles. The system is self-regulating to accommodate variable wash water supply for example during storm flows. Haigh has a full electrical control panel design and make capability. Packages can be supplied with or without integrating control systems.

HIGH PERFORMANCE SCREENINGS HANDLING FOR MEDIUM TO LARGE SIZED WASTE WATER AND SEWAGE TREATMENT WORKS

HOW IT WORKS

Screenings arrive into a conditioning tank via a launder flow channel from the screens. This can be a common launder or individual launder. Screenings handling are normally diluted using the screen wash water to provide the launder flow.

The level in the conditioning tank will rise to a preset start level, at which point the duty macipump(s) will start up. These are rated to beat the incoming launder flow so that the level in the tank will start to drop. The Macipump (s) will run until a preset stop level is reached and then change control to a 20-30 second run-on timer - this ensures that floating debris is drawn in or mixed and basically kept in suspension.

The Macipump is a disintegrator running on the same shaft as a centrifugal pump. Screenings are drawn into the pump through the cutterhead (headstock and shearplate design) so that the rag etc is disintegrated to a 10mm maximum particle size. They are then pumped away as a dilute mix (max 2% ds) to the liquid separating stage. In the solids disintegration and pumping action, the rag and paper is subjected to some severe agitation (washing) and greases, faecal matter are washed out of the rag, broken up and put into suspension.

Washed and disintegrated screenings are pumped into the liquid separator (LISEP) which uses centrifugal action to separate water from solids. The LISEP consists of a pair of conical sewage screens, with a rotor running inside but not in contact with. The rotor throws the dilute medium to the inner surface of the screen so that water and faecal matter is forced through (this decant liquor is piped back to the main channel or to a local drain point). The inner surface of the screen is swept clear by the rotor, moving the solids gradually up and out to the skip. There is a small compactor included on the discharge of the LISEP to further reduce the volume of screenings and to maximise dryness.

The LISEP can be positioned wherever convenient within 50 metres of the inlet with connecting pipework as required.

Haigh Sludge Macerators

SLUDGE MACERATORS: HAIGH PIPELINERS FOR SOLIDS DISINTEGRATION IN RAW SEWAGE AND SLUDGE

Dear prospective client,

Consider the benefits of a Haigh Pipeliner for your Sludge Macerator.
The modern automatic waste water treatment works and pumping stations are a marvel of modern engineering, able to work 24 hours a day without supervision.
I am certain you would like to see every waste water works under your control to be operating to the same high standard. Unfortunately financial constraints prevent the upgrading of every waste water works immediately.
The cost effective Sludge Macerator and Haigh Pipeliners will increase the reliability and effectiveness of these new treatment works and also prevent your pumps in your existing waste water works from blocking and causing unnecessary maintenance.
Haigh is a progressive company serving the waste water industry with high quality well engineered products. The Pipeliner, along with the Macipump and other products, all of which are designed for waste water treatment, have been proved with many thousands of hours of service in a multitude of applications. I hope the ideas shown on this web page will encourage you to specify with confidence Haigh Pipeliners at your works.

Yours faithfully,
 
Nigel Shepherd
Managing Director

A Sludge Macerator is a disintegrating device for raw sewage and sludges up to 8% solid matter in a pipeline under operating conditions ranging from –l bar to +4 bar. The cutters consist of a steel headstock with tungsten carbide wear blades rotating against a stationary alloy steel shearplate with a hardness of 50-55 rockwell, The size of the holes in the shearplate may be specified to suit the application. The cutters can be replaced without disturbing the mechanical seal. The seal will rotate in an oil bath to ensure adequate cooling and lubrication and will have sealing rings of differing grades of tungsten carbide.

Features of Sludge Macerator: Haigh Pipeliners

New innovative design: allows cutter cartridge to be replaced in only a few minutes.The Haigh Pipeliner 202 consists of a conditioning cutterhead co-axially mounted specifically designed to handle raw sewage and sludge. An external method of pumping is required.

Positive cut: highly effective proven cutting action gives controlled particle size and eliminates the tendency of shredded solids to reform.

Strong agitation: Ideal for harmonizing waste water into suspension.

Easy to service: Cutter Cartridge can be changed within minutes with perfect alignment using only two allen keys. No special tools required.

Drawback design of cutter cartridge eliminates need to disturb pipework when maintenance is required. Cutter Cartridge: The drawback design of the Pipeliner allows the easy removal of the cutting elements without disrupting the surrounding pipework. A standby cutter cartridge assembly can be economically purchased to avoid the cost of an entire second machine.

Sludge Macerator Options and machine sizes:-

Haigh Pipeliner 302 (Disintegrator)
The larger Haigh Pipeliner 302 is designed to disintegrate raw sewage at the rate of 45-100 Metres cubed per hour. Plus the option to handle sludge at the rate of 20-40 metres cubed per hour.
 
Haigh Pipeliner 202 (Disintegrator)
The Haigh Pipeliner 202 is designed to disintegrate raw sewage at the rate of 0-40 Metres cubed per hour. Plus the option to handle sludge at the rate of 0-20 metres cubed per hour.

Haigh Pipeliner 125s (Disintegrator) 
The Haigh Pipeliner 125S consists of a conditioning cutterhead co-axially mounted specifically designed to disintegrate raw sewage.

Haigh Pipeliner 101 (Disintegrator)   
Pipeliner 101 is the Pipeline Disintegrator for domestic raw sewage and small sites.