CDS Unit GPTContinuous Deflective

Separation

OVERVIEW

1. Purpose2. Description3. Comparison of GPT’s 4. CDS Operation5. Treatment

Performance6. Application7. Maintenance

PURPOSE

• The CDS technology is ideally suited to the removal of physical pollutants from stormwater

• Targeting the removal of gross solids and sediment

• Effective over a wide range of treatment flows

• No clogging / Blinding

• Low life cycle costs

DESCRIPTION

Continuous Deflective Separation

– Non blinding/clogging screen technology

– High rate physical separation, screen and vortex separation

– Guaranteed treatment flow rate

DESCRIPTION

– Separate treatment and storage zones,

– Pollutants stored out of flow path, reduced re-suspension

– Benefits of Direct Screening and Vortex Separation

Continuous Deflective Separation

Direct Screening Vs CDS

Q (Outflow)

CDSContinuous Predictable Flow - Non Blocking ScreenNo Bypass Flow occurs up to 100% capacityIdeal for continuous stormwater treatment models (e.g. MUSIC)

Reducing & Unpredictable Flows - Blocking ScreensResidual Flow (red) bypasses screening area

Q (Inflow)

Q (Inflow)

Q (Outflow)

Bypass

Direct Screen

COMPARISON OF GPT’S

CDS OPERATION

CDS OPERATION

CDS OPERATION

• Range of Treatment flows (22L/sec and Up)

• Online and Offline Models

CDS OPERATION

CDS Model Identification

– 4.7mm Aperture Screen Standard

– Steel components manufacture from 316 SS

– Precast is 50 MPa concrete

Most extensive independently validated GPT on the market

– CRC for Catchment Hydrology

– CSIRO

– Portland State University

– Louisiana State University

– UCLA

– New Jersey Corporation for

Advanced Technology (NJCAT)

TREATMENT PERFORMANCE

CDS Unit GPT

• Internationally patented technology

• Large customer base through out the UK, US, Asia and Australia

• Used for solid liquid separation in water, wastewater and stormwater treatment industries

TREATMENT PERFORMANCE

Gross Solids Separator, Wastewater Reuse System

Melbourne

CDS Unit GPT

TREATMENT PERFORMANCE

– Non-blocking screen / Guaranteed Treatable flow rate / High removal efficiency

– 98% reduction in Gross Pollutants

– 70% reduction in Total Suspended Solids

– 30% reduction in Total Phosphorus

– Up to 80% reduction in Heavy Metals

– Up to 94% of Hydrocarbons, Oils and Grease

Benefits of the CDS Unit GPT

APPLICATION

• Stormwater Treatment

• Stormwater Harvesting

• Combined Sewer Overflow

• Sewer Mining

• Liquid Solid Separation

APPLICATION

Fully Customisable

Inlet angle, tail-water, oil baffles, dual outlets, penstocks/drop boards, back to back units, exclusions bars, etc.

APPLICATION

Product Application Design

APPLICATION

Rocla offers a product specific design service giving customers detailed information including:

Product Application Design

• Product design and sizing advice

• Site specific design drawings, incorporating associated adjacent infrastructure & services

• Hydraulic analysis on the contributing drainage system, HGL, weir heights, etc.

APPLICATION

Rocla offers a product specific design service giving customers detailed information including:

Product Application Design

• Hydrological analysis of sites for rainwater/ stormwater harvesting applications

• Quantity and Quality treatment analysis

• Proven design outcomes for even the most difficult sites.

MAINTENANCE

Three Methods of Maintenance

• Removable Baskets

• Clamshell Bucket

• Suction Cleaning

MAINTENANCE

Easy and Efficient Maintenance– Large openings allow good access and

ventilation

– Large standard storage volume which can be increase if required

– No moving parts to grease or maintain

– Screen does not need to be cleaned due to CDS technology

– Low flow bypass and isolation device are available

DISCUSSIONDiscussion…