Post on 12-Mar-2018
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