Approved secondary treatment systems

What are Secondary Treatment Systems (STSs)?

Secondary treatment systems (STS) (previously known as Aerobic Treatment Unit (ATU)) is a wastewater treatment system which produces treated effluent of secondary standard, i.e. 20 mg/L of Biochemical Oxygen Demand (BOD), 30 mg/L of Total suspended solids (TSS) and 10 cfu/100 mL of Escherichia (E) coli. Due to the treatment and disinfection process, the treated wastewater from STS systems may be used for garden irrigation.

The STSs systems listed below have been certified to Australian Standard AS 1546.3 and approved by the Chief Health Officer for domestic installations in Western Australia. They may also be used for commercial installations. AS 1546.3 sets out requirements for the design, commissioning, performance and conformity testing of secondary treatment systems (STS).

STSs are to be installed and operated in accordance with the Health (Treatment of Sewage and Disposal of Effluent and Liquid Waste) Regulations 1974, the Code of Practice for the Design, Manufacture, Installation and Operation of Aerobic Treatment Units Serving Single Dwellings and AS 1547: On-site domestic wastewater management.

As the conditions of approval can vary between designs, persons interested in installing a particular STS should confirm it meets their needs and discuss site requirements with the local government.

STSs have regular service requirements (usually quarterly) and maintenance must be through an authorised person or their staff/subcontractors.

Where nutrient retention is required, the local government should be consulted to determine if the STS’s nutrient removal capacity will meet their requirements.

Table 1: Approved STSs
Manufacturer / Distributor Model Capacity Comment / Restrictions Approval Expiry Date

Allied Pumps (external site)
Phone: 9350 1000 / 1800 447 777
Email: sales@alliedpumps.com.au

Everhard
Aqua-Nova 2000
Model 80100
1800L/day Approved for sub-surface or sub-strata or above ground spray irrigation.
Global Certification
No. 077
16/02/2022

Aquarius Wastewater Systems Pty Ltd (external site)
Phone: 9240 8545
Email:admin@aquariuswastewater.com.au

Aquarius O–3 1800L/day
Approved for sub-surface or sub-strata or above ground spray irrigation.
Certification trial results showed that the system is capable of removing nutrients to the following concentrations:
TP (% removal): <1 mg/L (98.5%)
TN (% removal): <10 mg/L (97.8%)
SMKH21519
25/03/2021
Aquarius O–2
1800L/day
Approved only for below ground disposal via sub-surface irrigation, leach drains, or soak wells.
The system does not include Alum Sulphate dosing and disinfection system.
The system does not remove nutrients.
Aquarius O–2 NR 1800L/day
Approved only for below ground disposal via sub-surface irrigation, leach drains, soak wells or AquaSafe Drains.
The system does not include disinfection system.
Certification trial results showed that the system is capable of removing nutrients to the following concentrations:
TP (% removal): <1 mg/L (98.5%)
TN (% removal): <10 mg/L (97.8%)
Biolytix Ltd (external site)

WA Distributor:
Water installations: 9295 6263

BF6 - Mark 2 1600L/day Approved for sub-surface irrigation.
SMK40499
8/12/2020

Biomax Pty Ltd (external site)
Phone: 9250 7733
Email: info@biomax.com.au

BioMax C–10

1800L/day
Approved for sub-surface or sub-strata or above ground spray irrigation.
Interim SAI Global Certificate Number:

SMK40530

BioMax P10-M
Approved for sub-surface or sub-strata or above ground spray irrigation. Certification trial results showed that the system is capable of removing nutrients to the following concentrations:
TP (% removal): <2 mg/L (97%)
TN (% removal): <10 mg/L (97.8%)
BioSeptic Pty Ltd (external site)
Phone: 9274 6988
Email: sales@bioseptic.com.au
Performa 2000 1500L/day Approved for sub-surface or sub-strata or above ground spray irrigation.
SMK02221
18/10/2020
Earthsafe Environmental Pty Ltd
Phone: 1300 327 847
Email: steven@rivatec.com.au
Earthsafe Environmental
ES10PC
1500L/day
Approved for sub-surface or sub-strata or above ground spray irrigation.
SMKH20612
27/08/2021

Jowa Group Pty Ltd (external site)
Phone: 8381 9100
Email: admin@biocycle.com.au

WA Distributors:
Tim Clews: 0429 824 300
Greg Browden: 0401 967 330

Biocycle BIO-7000 1500L/day
Approved for sub-surface or sub-strata or above ground spray irrigation.
SMKH20266
22/11/2020

Fuji Clean Australia Pty Ltd (external site)

WA Distributor:
Ecowater WA: 0417 098 281
Email: ecowaterwa@bigpond.com
CE1500EX 1500L/day

Approved for sub-surface or sub-strata or above ground spray irrigation.
Certification trial results showed that the system is capable of removing nutrients to the following concentrations:
TP (% removal): 1.3 mg/L (84%)
TN (% removal): 21.0 mg/L (58%)

SMKH21993
09/05/2021
Global Roto-Moulding Pty Ltd (external site)
Phone: (07) 4697 7099
Email: info@globalwater.com.au
 UBI Aqua 6000L 1500L/day Approved for sub-surface or sub-strata or above ground spray irrigation.
SMK40298
31/12/2020
Graf Australia Pty Ltd (external site)
Phone: 1300 131 971
Email: info@grafaustralia.com.au

WA Distributor:
Aquarius Wastewater Systems PL (external site)
Phone: 9240 8545
Email: mel@aquariuswastewater.com.au
Graf E-Pro
15-1
Graf E-Pro 
15-1C

Graf E-Pro
15-1 PAC

1500L/day

Approved for sub-surface, sub-strata, above ground spray irrigation and disposal via flatbed drains, leach drains and soakwells.

Certification trial results showed system is capable of removing nutrients to the following concentrations:
TP (% removal): 3 mg/L (54%)
TN (% removal): 24 mg/L (50%)

Certification trial results showed "PAC" systems are capable of removing nutrients to the following concentrations:
TP (% removal): 0.3 mg/L (94.5%)
TN (% removal): 24 mg/L (50%)

Global certification No. 329 & 188 & 188/1

26/04/2020
Graf E-Pro
15-2

Graf E-Pro
15-2C
Graf E-Pro
15-3+O

Graf E-Pro
15-2 PAC
Graf E-Pro
15-3+O PAC

1500L/day Approved for sub-surface irrigation and disposal via flatbed drains, leach drains and soakwells.

Certification trial results showed system is capable of removing nutrients to the following concentrations:
TP (% removal): 3 mg/L (54%)
TN (% removal): 24 mg/L (50%)

Certification trial results showed "PAC" systems are capable of removing nutrients to the following concentrations:
TP (% removal): 0.3 mg/L (94.5%)
TN (% removal): 24 mg/L (50%)
Graf E-Pro
15-3

Graf E-Pro
15-3 PAC

1500L/day
Certification trial results showed system is capable of removing nutrients to the following concentrations:
TP (% removal): 3 mg/L (54%)
TN (% removal): 24 mg/L (50%)

Certification trial results showed "PAC" systems are capable of removing nutrients to the following concentrations:
TP (% removal): 0.3 mg/L (94.5%), TN (% removal): 24 mg/L (50%)
Kingspan Water & Energy Pty Ltd (external site)
Phone:1300 736 562
Email: gerry.quinn@kingspan.com
 

Kingspan BioFicient  Series 1


 1500L/day
Approved for Surface irrigation, Sub-surface irrigation, Sub-strata irrigation, Flatbed drains, Leach drains, Soakwells
 SMK40710 
22 November 2023

Suncoast Waste Water Management (external site)
Phone: 1800 450 767
Email: info@ozzikleen.com
Ozzi Kleen RP-10 2000L/day Approved for sub-surface or sub-strata or above ground spray irrigation.
SMK02608
14/08/2021
Ozzi Kleen RP-10A+
2000L/day Approved for above ground spray irrigation, sub-surface or sub-strata drip irrigation.
Certification trial results showed that the system is capable of removing nutrients and produce the following effluent quality:
TP: <5 mg/L
TN: <10 mg/L
BOD: <10 mg/L
TSS: <10 mg/L
E.coli: <10cfu/100mL
Taylex Industries Pty Ltd (external site)
Phone: 1300 TAYLEX (1300 829539)
Email: info@taylex.com.au

Taylex ABS 10EP (Concrete and plastic)

2000L/day For dwelling units up to 10 persons.
Approved for above ground spray irrigation, sub-surface, sub-strata drip irrigation, leach drains and soakwells.
Certification trial results showed that the system is capable of removing nutrients to the following concentrations:
TP (% removal): 2.5 mg/L (84.67%)
TN (% removal): 24.9 mg/L (53.71)
Global Certification
040/8 & 040/10
11/07/2021

Taylex ABS 8EP (Concrete and plastic)

1200L/day For dwelling units up to 8 persons.
Approved for above ground spray irrigation, sub-surface, sub-strata drip irrigation, leach drains and soakwells.
Certification trial results showed that the system is capable of removing nutrients to the following concentrations:
TP (% removal): 2.5 mg/L (84.67%)
TN (% removal): 24.9 mg/L (53.71)
Toowomba Tanks Pty Ltd (external site)
Phone: (07) 4634 3860
Email: toowoombatanks@gmail.com 

WA Distributor:
TMC Australasia: 0418 267 959
Email: tony@tmcwaterrecycling.com
Barracuda
AWTS Super Treat IT
2000L/day For dwelling units up to 10 persons.
Approved for above ground spray irrigation, sub-surface, sub-strata drip irrigation, leach drains and soakwells.
 Global Certification
023/2
23/05/2020

Table 2: STSs assessed and not approved or approval withdrawn
Manufacturer Model Reason not approved / Further information
BioSystems 2000 Pty Ltd Biosystem 2000 Standard Mark certification not provided as of 1 July 2015.
Fuji Clean Australia Pty Ltd CE1200 Standard Mark certification not provided as of 1 July 2015.
Galvin Concrete & Sheetmetal Pty Ltd

Clearwater 90 Compact

Standard Mark certification not provided as of 1 July 2015.
Icon-Septech Pty Ltd Septech Turbojet 2000
Company liquidated. For further information, visit:
Australian Securities and Investments Commission (external site). Systems that have been purchased on or before 27 June 2016 may still be installed.
Jowa Group Pty Ltd Biocycle 5800 Standard Mark certification not provided as of 1 July 2015.
Water Gurus Pty Ltd Novaclear Company liquidated. For further information, visit:
Australian Securities and Investments Commission (external site)

More information

Environmental Health Directorate
Department of Health
Telephone: 9222 2000
Email: ehinfo@health.wa.gov.au

Approved for sub-surface, sub-strata, above ground spray irrigation and disposal via flatbed drains, leach drains and soakwells.

Certification trial results showed system is capable of removing nutrients to the following concentrations:
TP (% removal): 3 mg/L (54%)
TN (% removal): 24 mg/L (50%)

Certification trial results showed "PAC" systems are capable of removing nutrients to the following concentrations:
TP (% removal): 0.3 mg/L (94.5%)
TN (% removal): 24 mg/L (50%)

Last reviewed: 14-11-2019
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