WATER & WASTE WATER

PROCESS EQUIPMENT

AWMA service all industry sectors with engineered, purpose built, innovative

water control solutions on a global scale. AWMA have recently formed a strategic

partnership with the global organisation Ham Baker Group. This partnership will

combine Ham Bakers’ 120 years of proven industry experience in water and

waste water processing equipment with AWMA’s well respected local

manufacture capability and customer focused solutions. AWMA will utilise existing

in-house capabilities to manufacture this extended range of products, continuing

to deliver innovative and efficient solutions for water management and water

treatment.

AWMA specialise in the design, manufacture, installation and service of

customised water control and now inlet works process equipment. All equipment

is supplied under our ISO 9001 accredited quality management system ensuring

compliance with all applicable international standards, local regulations and

project specific requirements.

Our unique approach to design is inclusive, ensuring that sustainable solutions

are developed in partnership with our clients, resulting in superior operational

performance and reduced whole of life costs.

When discussing your next water or wastewater project, consider involving

AWMA in the early design phase to benefit from experience, support and

innovative solutions.

The AWMA website features product information, project articles, design options,

photos and documentation for your information, alternatively contact the head

office on +61 3 5456 3331 for assistance.

www.awmawatercontrol.com.au

Travelling Fine Screen 4

Double Flow Bandscreen 6

Screw Screen Compactor 8

Integrated Compact Sewage Pre-Treatment Systems 14

Self-contained Inlet Plant 18

Grit Star 20

WATER & WASTE WATER

PROCESS EQUIPMENT

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TRAVELLING FINE SCREEN

DESCRIPTIONOur Travelling Fine Screen incorporates fabricated

panels manufactured from pre-formed stainless

steel perforated plate with apertures sized to suit

specific applications. The panel design allows easy

replacement in case of accidental damage whilst

being securely fastened to the special strength

203mm pitch roller link chain.

Panel cleaning is via a two-stage cleaning process.

First, a solid filled modular rotary brushing system

with optimised position and bristle configuration

removes the majority of screenings. This brushing

system allows speedy replacement and adjustment.

Second, wash water jets provide the final polish and

ensure the rear cavity of the equipment remains

free from blockage.

Each panel has a replaceable side seal

manufactured from bearing grade ultra-high

molecular weight polyethylene fitted between the

chain and panel to effect a close tolerance seal, with

the seal fitted to the screen structure.

The main structural side plates are manufactured

for strength and rigidity. These plates incorporate

side outlet passages at flow level to allow passage of

screened flow minimising headloss.

The high strength chains run in ultra high molecular

weight polyethylene guides and are driven by

sprockets attached to the head shaft running in ball

bearing plummer blocks. The drive is from a shaft

mounted gearbox with a choice of motor types to

suit specific applications.

The drive continually moves panels from the

screening zone via the channel in front of the

equipment to the cleaning mechanism where the

debris is removed from the perforated panels.

The fine screen is fully guarded by stainless steel

covers fastened to the main side structure.

The fine screen can be inched forward in case of

mechanical stoppage and hinged to pivot out of flow

for maintenance purposes. Dual speed units can be

supplied.

The screenings capture ratio is 79% as assessed at

the national Screen Evaluation facility, Chester-le-

Street, England.

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KEY FEATURES■ Unique cutaway side plate designhelps

reduce head loss.

■ Perforated hole size: 3mm to 6mm diameter.

■ Screen angles: 70° standard (45° and 60°

options).

■ Screenings Capture Ratio: 79%.

■ Incorporates high open area screening media to

improve hydraulic and capture performance.

■ Rotary brush cleaning mechanism combats hair

pinning even when used with minimal wash

water.

■ Fully retractable spray barallows speedy nozzle

unclogging.

■ Engineering bearing grade plastic side sealing

system, helps prevent solids bypass and offers

exceptional abrasion resistance.

■ Bespoke design for retrofitting or new chamber

installations up to 3m wide and 9m deep.

■ Quick and easy to install and maintain – shallow

excavation.

■ Material of construction: Grade 304 or 316 stainless

steel and carbon steel.

Proven hydraulic andcapture performance

established during independent trials at the

National Screen EvaluationFacility Chester-le-Street

England, conducted by UKWIR

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TRAVELLING FINE SCREEN

DOUBLE FLOW BANDSCREEN

DESCRIPTIONScreening panels are carried on a vertical travelling

path, between chains suspended from substantial

sprockets on a head shaft. The chains, screen panels

and guides are contained in a carbon steel or

stainless steel screen support structure. A feature

of this type of screen is its high capacity per width

ratio and ability to deal with large variations in water

levels and depths.

Dependant upon the size of screen, the frame will be

fabricated from rolled steel sections suitably braced

to withstand loads or from pressed and fabricated

plate in stainless steel or carbon steel. The head

section is fabricated to hold the head shaft in guides

and incorporates spray pipes and discharge trough.

Covers are manufactured in stainless steel and have

inspection windows fitted as standard.

The chains are at pitches of 200, 300 or 450mm

depending on the size of the screen. Links are

carbon steel plated or stainless steel and fitted

with moulded nylon rollers sized to suit the screen.

Drive to the head shaft, which is supported in

heavy duty roller bearings, is normally by a shaft

mounted gear reducer often with two speed

motor. Motors can be fitted with torque limiting

coupling or preferably current overload sensing,

to prevent damage due to obstruction or

overload.

The panel frames are of mild steel or stainless steel

construction secured to the chain by stainless steel

bolts. The frame carries plastic perforated panels or

stainless steel meshes depending upon application

and can be removed from outside the screen. The

trailing edge of the panel is extended forward to

form platforms for lifting larger debris.

Each panel is fitted with shaped seal plates. This

corresponds with fixed side seals to give

minimum clearance at sealing between clean and

unscreened water.

The screens are fitted with spray header pipe(s)

each with a row of jets to wash debris from the

panels into the debris trough incorporated into the

head covers. Debris troughs can be fitted with extra

sparge water supply, dependent upon debris

loading.

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KEY FEATURES■ High capacity per width ratio.

■ Up to 750 litres per second flow rate.

■ Carry-over prevented.

■ Thick plate perforated plastic or stainless steel

mesh panels.

■ Screen widths of up to 4.0m and depths of 20m can

be provided.

■ Screening down to 3mm where required.

■ Screenings Capture Ratio of up to 87%.

■ Heavy duty chains of proven design for low

maintenance.

■ Highly efficient side sealing systemprevents

screenings transfer downstream.

■ Removable panels for ease of maintenance.

■ Material of construction: Grade 304 or 316 stainless

steel.

Proven hydraulic andcapture performance

established during independent trials at the

National Screen EvaluationFacility Chester-le-Street

England, conducted by UKWIR

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DOUBLE FLOW BANDSCREEN

GENERAL INFORMATIONScreening is the first function which must be

considered in a civil or industrial wastewater

treatment plant. Its purpose is to intercept and

remove suspended solid particles that can damage

and/or slow down the depurative processes and

plant equipment.

The screw screen compactor with self-cleaning

brush is specially designed for fine screening of

sewage at the entrance of the plant or in many

industrial applications. Generally, it is installed

downstream of a coarse screen.

This is a multifunctional screen as it includes the

following operations:

■ Screening

■ Lifting and washing of the screened material

■ Compacting and dewatering

■ Discharge

The filtration level is defined depending upon the

type and amount of material expected and

according to the scheme of the purification process

adopted.

The screen filter consists of a semi-cylindrical

basket. The machine is able to block the small

suspended solid particles (larger than the screen

perforations), lifting them out of the water flow

by means of a screw, compact and convey them to

discharge, which is placed at the top of the machine.

During lifting the material is washed to remove

soluble organic substances.

APPLICATIONS■ Civil waste water treatment plants

■ Industrial waste water treatment plants

■ Tanneries

■ Industrial laundries

■ Slaughterhouses

■ Paper mills

■ Textile and fish industry

■ Food and chemical industry

SCREW SCREEN COMPACTOR

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Spiral screw brushes

Compaction area

Basket with conical zone

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CONSTRUCTION FEATURES Screw Screen Compactor model utilises a shaftless screw (anti-clogging spiral) technology to be installed in

the channel or in a steel container.

Screening area consisting of a semi-cylindrical filter basket with holes of variable diameter according to the

flow to be treated. For special applications we offer customised filter baskets.

Screw conveyor with special modular brushes bolted along a helical edge to provide cleaning of the semi-

cylindrical screen during the rotation of the spiral.

Lateral plastic strips fitted with metal mesh, seal the filter screen to the channel side walls.

Wear resistant plates bolted inside the housing of the spiral.

Cylindrical compaction zone for pressing the screened material, complete with flexible pipe to drain the

liquid and top cover for inspection.

Conical discharge outlet with full opening to prevent possible clogging of the compacted screened material

during unloading.

Adjustable foot support to allow the lifting of the tilting screen screw.

Installation in channel or in steel container.

Dimensions and level of filtration are determined according to the characteristics of the channel in which the

screen screw compactor is installed, the desired discharge height and the flow to be treated.

STRENGTHS■ Multifunctional: screening, lifting and cleaningof

the screened material, compaction and

dewatering, discharge.

■ Easy and quick to install.

■ Closed structure for odour control.

■ Reduced maintenance.

■ Tested at the National Screen Evaluation Facility

at Chester-le-Street STW with an Average

Screenings Capture Ratio of 51%.

ACCESSORIES■ Basket with trapezoidal bars.

■ Screen washing device.

■ Transport area washing device.

■ Compaction zone washing device.

■ Control cabinet.

■ Bagging system for screened material.

■ Transport area insulation for compaction at low

temperatures.

■ Without compaction zone.

■ Installation in a steel container tank.

■ Vertical installation for flanged connection to pipeline.

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Machine code Specification

Screen screw type Without central shaft

Diameter 200mm 300mm

400mm 500mm

600mm 700 mm

Spiral type Reinforced Conical

Inclination 35° to 45°

Length up to 12m

Basket cleaning With bolted brushes

Screen perforation 2mm 3mm 5mm 7mm

Basket type Circular holes

Rated power 0.55kW to 1.1 kW

Rotation speed ~10 rpm

Compaction degree 40% to 60%

Structural work

materials

AISI304L AISI316L

Spiral material Special steel AISI304L

AISI316L

Wear-resistant coating Stainless steel plates

GENERAL INFORMATIONThe pre-treatment system provides screening, sand

removal and eventually oil and grease removal from

sewage. The pre-treatment fulfils the need to protect

civil or industrial wastewater treatment plants. It's

purpose is to intercept and remove coarse solids,

sands and oils that can damage or slow down the

subsequent depurative processes and plant equipment,

or cause pipeline obstruction.

These compact systems consist of steel pre-

treatment facilities, which do not require civil works

for installation.

Compact system for sewage tanker acceptance with

screening and compaction.

The sewage pre-treatment station is equipped with a

screen screw seated in a steel tank to filter waste

water and remove the coarse materials. To do this

the screw screen is equipped with a semi-cylindrical

perforated metal sheet screen (basket) and a screw

conveyor.

The screen screw without central shaft minimises the

risks associated with possible clogging caused by

rags, plastic etc.

The screen utilises “clogging” logic. It starts only

when the level sensor, placed inside the acceptance

plant, is enabled. This logic guarantees pre-filtration

caused by the sewage solids which settle on the

basket, thus blocking the holes.

This compact system includes a male ball joint for

direct connection to a sewage tanker, with an

automatic flow control valve operated by the level

sensor placed inside the machine.

The system, contained in a suitable tank, is

hermetically sealed and can be installed even in

limited spaces.

In the filtration area, the system is equipped with

washing bar, solenoid control and nozzles. This

serves two purposes: cleaning the filtration area and

partial washing of the screenings with a consequent

reduction of organic matter (odour reduction in the

subsequent screenings storage zone).

INTEGRATED COMPACT SEWAGE

PRE-TREATMENT SYSTEMS

APPLICATIONS Civil waste water treatment plants.

Industrial waste water treatment plants,

including tanneries, industrial laundries,

slaughterhouses, paper mills, textile and fish

industries, food and chemical industries.

STRENGTHS■ Multifunctional: screening, lifting and cleaning of

the screened material, compaction and dewatering,

discharge.

■ Easy and quick to install.

■ Closed structure for odour control.

■ Reduced maintenance.

■ Sewage tanker quick discharge.

ACCESSORIES■ Screening bagging system.

■ Control cabinet.

■ Belt screen version.

Control cabinet

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Compact system for sewage tanker acceptance with screening and compaction

Compact system for sewage tanker acceptance with screening, compaction and desanding.

Compact sewage pretreatment station with screening, compaction, desanding and deoiling.

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Machine code Specification

Screw conveyor type Without central shaft

Models 50-100

Basket clearing With bolted brushes

Basket spacing (drilling) 5-7 mm

Basket type With round holes

Rated power 0.55kW-1.1kW

Rotation speed 10 rpm

Compaction degree 40-60%

Chassis materials AISI304L AISI316L

Spiral material High strength carbon

steel

AISI304L AISI316L

Wear-resistant coating Stainless steel plates

Compact system for sewage trucks acceptance

Maximum flow for water with 200 ppm SS

Ltot Linf Hdis Htot Hinl Flow Valve R.P. Screen

R.P.Inlet –

Male

Spherical

Outlet

Model [mm] [mm] [mm] [mm] [mm] [m3/h] [kW] [kW] [DN] [DNPN10]

50 4000 2110 1500 2200 800 50 0.18 0.55 100 200

100 5100 3710 1990 2900 1100 100 0.18 1.1 100 200

SCREW SCREEN GENERAL SPECIFICATIONS

The compact stations are designed to solve the

problem of sewage pre-treatment at the entrance of

small plants. They eliminate the need to construct

reinforced concrete tanks.

These compact stations perform the following

steps: screening, compaction and desanding.

In addition, options are available with deoiling

treatment functions.

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SEWAGE TANKER FOR SCREENING, COMPACTION AND GRIT REMOVAL

SELF-CONTAINED INLET PLANT

Travelling Fine Screens:■ Unique cutaway side plate design helps reduce

head loss.

■ Screenings Capture Ratio of 79%.

■ Incorporates high open area screening media to

improve hydraulic and capture performance.

■ Auto adjusting rotary brush cleaning mechanism

combats hair-pinning, even when used with

minimal wash water.

■ Washing debris plate.

■ Fully retractable spray bar allows speedy nozzle

unclogging.

Bandscreens:■ High capacity per width ratio.

■ Carry-over prevented.

■ Thick plate perforated plastic or stainless steel

mesh panels.

■ Screening down to 3mm where required.

■ Heavy duty, proven design, chains for low

maintenance.

■ Highly efficient side sealing system prevents

screenings transfer downstream.

■ Removable panels for ease of maintenance.

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DESCRIPTIONA combined package of screening and grit removal is a pre-requisite of wastewater treatment to make the

on-going effluent a manageable and consistent medium prior to entering the next phase of treatment.

The system includes fabricated tanks which are either modular or site specific to suit the flows and location.

Depending on the flow and operating regime we can offer Travelling Fine Screens or Bandscreens or a

combination of both.

Screenings Handling (Star Wash):■ Impressive volume reduction and dryness fraction.

■ Pioneering cleaning techniques.

■ Available in 150mm, 200mm and 300mm body

diameters to accommodate varying throughput

requirements.

■ Stand alone, under screen or integrally

screen mounted.

■ Enhanced reliability – does not use cutter blades

or macerators.

■ Not subject to excessive wear in gritty conditions.

Grit Removal (Grit Star):■ Efficient removal of both faecal and vegetable

matter resulting in a cleaner grit with considerably

lower organic content.

■ Low cost and low energy use.

■ Compact design.

■ High efficiency - takes full advantage of

gravitational settlement.

■ Simple, low rotating paddle mechanism, easy to

maintain.

■ Capacity from 100 to 18,000m3/hr.

■ 95% removal of grit greater than 315 microns in

size with specific gravity of less than 2.65.

■ Available in modular sections for ease of assembly

on site.

BENEFITS■ ‘One Stop Shop’ ready to go inlet works.

■ Manufactured to ISO quality accredited standards.

■ Pre-wired and pre-commissioned in the AWMA

manufacturing facility.

■ Designed to provide easy maintenance and access

once installed.

■ Minimal civil works required on site.

■ Time on site greatly reduced.

■ Health and safety risks on site are minimised.

■ Capacity to suit client flow rate requirements.

■ Typically 50 to 700 litres per second.

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GRIT STAR

DESCRIPTIONA combined package of screening and grit removal is a prerequisite of wastewater treatment to make the

ongoing effluent a manageable and consistent medium prior to entering the next phase of treatment.

The Grit Star grit removal system is designed to provide the highest grit removal performance possible.

The grit removal device has less than 6mm (270°) or 152mm (360°) headloss. No moving parts that can be

subject to wear or stoppage are sited below the water surface. An integral scouring / fluidising line is provided

to clean or fluidise the grit before extraction. All drives, lubrication points and bearings are readily accessible

from the walkway above the bridge level. The impeller is positioned immediately above the grit collection

hopper, rotated by a drive tube to optimise velocity and maximise the removal of faecal and vegetable

matter in the grit chamber.

The grit removal system can be provided to operate in a pre-cast concrete trap (provided by others) or we can

provide a fabricated tank in stainless steel or shot blasted and painted mild steel to suit clients requirements.

System overview

■ Proven design with track record stretching back to 2003

■ Installed at various sites in the UK

■ All moving parts fully guarded

■ Manufactured under a Quality System accredited to ISO 9001

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The grit classifier is designed and sized to receive a liquid/solid

mixture, settle solids out of the mixture into a trough and convey

the solids via a rotating spiral to a discharge point. Water and

suspended solids exit the unit through an overflow chamber.

KEY FEATURES■ 95% removal of grit greater than 315 microns in size with a specific gravity greater than 2.65.

■ 85% removal of grit greater than 210 microns in size with a specific gravity greater than 2.65.

■ 65% removal of grit greater than 140 microns in size with a specific gravity greater than 2.65.

■ Intake capacities from 100m³/hour up to and including 18,000m³/hour.

■ Efficient removal of both faecal and vegetable matter resulting in a cleaner grit with considerably lower organic

content.

■ The grit removal device has less than 6mm head loss.

■ The 270° Grit Star grit removal system comprises a compact, circular trap located in the head works of the

wastewater treatment plant. Each grit chamber comprises: geared motor driven drive head, impeller, impeller

drive tube, grit pump/blower and connecting pipework to the classification and de-watering plant.

OPTIONS■ Grade 304 or 316 stainless steel main structure.

■ Grit trap can be fabricated from mild steel or stainless steel as part of a package inlet works.

■ Supply to site in sections for assembly in-situ.

■ ATEX certified use in hazardous areas.

■ Control panel and field cabling.

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AWMA’S RANGE OF WATER CONTROL GATES, BULKHEADS

AND STOPBOARDS INCLUDE:

For further information view www.awmawatercontrol.com.au

ULF Undershot PENSTOCKS

DLF Overshot PENSTOCKS

DECANT WEIRS WLF Wedge-locking PENSTOCKS

TLF TopsealingPENSTOCKS

TLF-P PENSTOCKS STOPLOGS FLAP GATES BULKHEADS/ ROLLER GATES

STOPBOARDS

RADIAL GATES LAYFLAT TILTING WEIR GATES

SIDEWINDERS COMBINATION GATES

SELF-REGULATING TIDAL GATES

HEAD & DISCHARGE GATES

CONCEALED FLOOD BARRIERS

RETRACTABLE FLOOD BARRIERS

TILTING FLOOD BARRIERS

DEMOUNTABLE FLOOD BARRIERS

SCREENS I SELF-CONTAINED INLET PLANT SCREENINGS HANDLING I GRIT REMOVAL

Engineering Design, Australian Manufacture

Installation & Commissioning

Local Technical & Sales Support

ISO 9001:2015 Quality Accreditation

INLET SCREENS

SELF-CONTAINED INLET PLANT

SCREENINGS HANDLING

GRIT REMOVAL

PENSTOCKS

BULKHEADS

STOPBOARDS

FLOODGATES