Case Studies > Commercial


The design and application flexibility of the AES wastewater treatment system can provide a natural, low maintenance and affordable solution to commercial premises on-site sewage needs.

AES and its precursors have been in use in the US for over 25 years installed in businesses from eco-resorts to McDonald’s restaurants.

In New Zealand, AES systems have been installed at RSE’s (Recognised Seasonal Employers), campgrounds, maraes, museums, mini-golf and DOC facilities. Custom wastewater and septic treatment solutions are AES’s speciality.

Greenwood Park, Nelson has an AES system installed under the car park of the holiday camp.

Owner Chris White-Johnson said  “There are lots of different systems out there but the reason we have gone for the Advanced Enviro-septic system is that you can put it under a hard surface and utilise every bit of land you have got. With the old sand filtration system, you had to isolate a whole area and you lost a lot of available space. We have gone for something state of the art that will work for a long time. It’s a great concept.

Councils, rural communities and property developments can all benefit from the passive nature of the AES system particularly as capital, maintenance and operating costs of conventional systems increase.

Conventional aerated wastewater treatment systems (AWTS) can suffer major failure through bacterial die-off in low load periods resulting in high maintenance costs and poor quality output.

AES’s passive biological treatment process is the most tolerant advanced secondary system capable of handling load variations. The large bacterial surface area (7m2 per Lm of AES pipe) and highly oxygenated biological environment, allows the bacterial load to adjust rapidly according to the volume of carbon entering the system.

AES can be used to refurbish sand filtration beds treating primary effluent with bacteria and protect the infiltration bed against progressive failure. Or it can be used for completely new sewage treatment plants with massive reductions in capital and operating costs over standard mechanical and chemical plants.

Check out some US examples in Presby Commercial Systems