AS 1546.3:2017

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On-site domestic wastewater treatment units, Part 3: Secondary treatment systems

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This Standard sets out requirements for the design, commissioning, performance and compliance testing of secondary treatment systems (STS) and advanced secondary treatment systems designed to treat domestic wastewater. The design hydraulic treatment capacities that may be tested in accordance with this Standard range from a minimum of 1200L/d to a maximum of 5000L/d. Guidance on installation, operation and maintenance is also provided.

Header

About this publication

Preface

1 Scope and general

1.1 Scope of standard

1.2 Inclusions

1.3 Exclusions

1.4 Objectives

1.5 Interpretation

1.6 Application

1.6.1 General

1.6.2 Nutrients

1.6.3 Legislation

1.7 Normative references

1.8 Definitions

1.9 Test requirements

1.9.1 General

1.9.2 Test STS for assessment of compliance with this Standard

1.10 Abbreviations

2 Performance criteria and design requirements

2.1 Scope of section

2.2 Performance criteria

2.2.1 General

2.2.2 Effluent compliance criteria

2.2.3 Nutrient reduction testing (where specified by the supplier)

2.3 Design requirements

2.3.1 Design parameters

2.3.2 Design considerations

2.3.3 Temperature range

2.3.4 Tanks and fittings

2.3.5 Selection of materials

2.3.6 Design and construction of tanks

2.3.7 Emergency storage capacity

2.3.8 Contamination of effluent storage chamber

2.3.9 Mechanical and electrical equipment

2.3.10 Noise levels

2.3.11 Service life

2.3.12 Alarm system

2.3.13 Modifications

2.3.13.1 General

2.3.13.2 Modifications triggering system retest

2.3.13.3 Modifications not requiring retest

2.3.14 Sampling points

2.3.15 Disinfection

2.3.15.1 General

2.3.15.2 Disinfection apparatus

2.4 Electricity consumption

2.5 Installation

2.6 Operation and maintenance

3 Marking of secondary treatment systems

3.1 Scope of section

3.2 Requirements

3.2.1 Minimal information

3.2.2 Permanence and visibility

4 Information to be provided with an STS

4.1 Scope of section

4.2 STS documentation

4.2.1 STS data

4.2.2 Installation, operation and maintenance instructions

4.2.2.1 General

4.2.2.2 Installation instructions

4.2.2.3 Operating and maintenance instructions

5 Evaluation of product conformity

5.1 Scope of section

5.2 Product conformity

Appendix A

A1 Scope of Appendix

A2 Test STS

A3 Testing facility

A4 Installation for testing

A4.1 General

A4.2 Specifications

A5 Type testing procedures

A5.1 General

A5.2 Influent

A5.2.1 Influent collection

A5.2.2 Influent quality and testing

A5.2.3 Influent distribution

A5.2.4 Temperature

A5.3 Commissioning phase

A5.3.1 General

A5.3.2 Sludge accumulation testing

A5.3.3 Nutrient testing

A5.4 Sampling

A5.4.1 General

A5.4.2 Stress test sampling

A5.5 Method of analysis

A5.6 Testing schedule

A5.7 Daily influent flow schedule

A5.8 Sampling schedule

A5.9 Stress test procedures

A5.9.1 General

A5.9.2 Laundry day stress test

A5.9.3 Power failure stress test

A5.9.4 Overload (133% capacity) stress test

A5.9.5 Vacation/no flow stress test

A5.9.6 Chemical stress test

A5.9.7 Surge/peak flow stress test

A5.10 Alternative disinfection system testing

A5.11 Maintenance servicing

A5.12 Outcomes of testing

A5.13 Reporting

A5.14 Decommissioning the STS

Appendix B

B1 Scope of Appendix

B1.1 General

B1.2 Disinfection purpose

B2 Chlorine disinfection

B2.1 General

B2.2 Chlorine disinfection apparatus

B2.3 Chlorine application apparatus

B2.3.1 Liquid chlorine dosing

B2.3.2 Solid chlorine disinfection

B3 Ultraviolet light disinfection

B3.1 General

B3.2 Apparatus

B3.3 Ultraviolet lamps

Appendix C

C1 Scope of Appendix

C2 Installation

C3 Site requirements

C3.1 Near buildings

C3.2 Desludging access

C3.3 Geotechnical

C3.4 Surface and subsurface waters

C3.5 Sanitary drainage

C4 Manufacturer’s installation instructions

C5 Installation verification

Appendix D

D1 Scope of Appendix

D2 Operation and maintenance procedures

D2.1 General

D2.2 Procedures

D2.3 Manuals

D3 Operational monitoring

D3.1 General

D3.2 Disinfection monitoring

Appendix E

E1 Scope of Appendix

E2 Relevance

E3 Testing and product certification

E4 Definitions

E4.1 Batch release inspection and test

E4.2 Certification scheme

E4.3 Production batch

E4.4 Sample

E5 Minimum sampling and testing frequency plan

E5.1 General

E5.2 Quality plan

Amendment control sheet

AS 1546.3:2017

Amendment No. 1 (2018)

Correction

Bibliography