- Home
- Site Analysis
- Site Use
- Passive Design
- Water
- Minimising water use
- Stormwater controls
- Rainwater Systems
- On-site Wastewater Treatment
- Septic Tanks: Overview
- Septic Tanks: Design Checklist
- Aerated Wastewater Treatment Systems
- Disposal Systems
- Care and Maintenance
- Greywater: Uses and Safety
- Greywater: System Design and Installation
- Greywater: Gravity and Pumped Systems
- Greywater: Filtering and Treatment
- Greywater: Irrigation Systems
- Composting Toilet Systems
- Material Use
- Energy
- Health and Safety
- Other Resources
Water
Designing homes to use water efficiently, reduce costs and cope with more frequent droughts or storms.
Aerated Wastewater Treatment Systems
Aerated water treatment systems progressively treat and filter the wastewater as it moves by gravity through a series of chambers or tanks. They treat the wastewater to a higher level than that achieved with a septic tank and may, depending on the system provide water suitable for the irrigation of fruit trees.
The treatment process steps are:
- anaerobic decomposition and settlement of solids
- filter
- aerated or aerobic decomposition which may incorporate a bioreactor to give additional bacterial treatment
- fine filter
- clarification chamber (four-chamber systems only) to allow fine sludge particles to settle and be pumped back to the first chamber
- pump chamber where a submersible pump feeds the disposal field.
- Additional treatment of the effluent water may be provided by passing the wastewater through a sand filter, reed beds or textile bed reactor then collecting it and pumping it to the disposal field.
- Domestic wastewater treatment tank with baffle and separate greywater inlet
In this option greywater bypasses the sludge chamber.
- Proprietary system with filtration unit
A single chamber tank incorporating a baffle and screen filter. This produces cleaner effluent than the traditional single-chamber septic tank.
For your clients
To help your clients understand onsite wastewater treatment options, safety issues, and the importance of maintenance, refer them to www.smarterhomes.org.nz/water/on-site-sewage-systems and www.smarterhomes.org.nz/water/re-using-greywater.