Probably the most common form of blackwater system in new zealand is the septic tank where some of the solids are digested by anaerobic bacteria and the remaining.
Grey water treatment systems nz.
Blackwater is the wastewater from the kitchen sink and toilets although blackwater systems usually treat greywater as well.
How it works see second image for diagram step 1.
Greywater systems used for toilet flushing should have a treatment system.
In new zealand commercially manufactured grey water systems that meet the requirements for treatment and reuse of water are available.
As an exceptional septic tank alternative naturalflow is the wastewater solution for new zealand s rural homes and businesses.
The average kiwi spends 7 minutes in a shower which depending on the shower head can equate to between 7 and 14 litres per minute.
Purchase ready made grey water systems for your home.
Any on site wastewater treatment system must meet performance requirements for construction and operation of the building code.
Greywater is water from basins baths and showers that is piped to a surge tank.
Testing by environmental science and research esr on greywater systems in new zealand found the presence of bacteria which can harm your health even in treated greywater.
Throughout new zealand many are already enjoying the benefits of reusing grey water.
These units are typically comprised of a plastic gully with a grating a submersible pump which automatically moves the grey water to the irrigation system.
When the valve is open greywater flows directly to the mains sewage or septic tank.
Use water twice and return it to the environment naturally.
Grey water comes from baths showers laundries dishwashers etc.
Water from kitchen sinks was found to be unsafe for reuse because of the risk of contamination from organic matter such as bacteria from meat.
Greywater systems must comply with building code requirements.
A grey water recycling system will filter and clean around two thirds of your water use ready for use in a dripper feed irrigation system.
If the system is designed to as nzs 1547 the requirements of the code will be met.
These robust power free sewage treatment systems in nz have very little maintenance requirements and are cost effective throughout their lifetime making them good replacements for traditional septic tanks.
How a greywater system works.
The greywater is held briefly in the tank before being discharged to an irrigation or treatment.
If a greywater treatment system dgts is being used rather than a greywater diversion device gwdd the waste water from the kitchen can be included.
All greywater diversion systems must use by law a subsurface or substrata irrigation discharge system such as drip irrigation.
Save your septic system if you have one by diverting grey water from it.
