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Joondalup Primary School

Iron Treatment

About this Project

Joondalup Primary School has extensive grounds that include a sports oval, nature playground and eight grassed social areas. They use sprinklers to keep these areas green and healthy.

Iron staining became a visible problem over time as iron has calcified onto paving and buildings near the sprinklers. Untreated bore water is used by the sprinklers and this is the cause of the staining.

Below you will find information on the:

  • Extent of the Problem
  • Bore Water Treatment 
  • Leftover Iron
  • The Visual Impact of Iron Staining

We have installed a bore water treatment system that is extremely good at removing iron, calcium and other minerals. The result is clean and balanced water which doesn’t stain property.

Joondalup Primary School Bore Water Treatment

Extent of the Problem

People become accustomed to the look of iron staining because the accumulation of iron and calcium is so slow.

Each day, the stain is marginally worse than the day before.

This picture of Joondalup Primary School shows a wall that has been exposed to sprinklers three times a week for several years.

We applied an acid-based wash that removes iron stains to see how deep the stain actually was.

It is always best to install a bore water treatment system before the stain accumulates but in this case Joondalup Primary didn’t have that option.

The iron stain had crept up on them.

Bore water Treatment at Joondalup Primary School

Bore Water Treatment

Our preliminary water tests showed that the school’s bore water has a very high iron concentration in its ground water.

Test results from our water samples confirmed this and were the basis of the water treatment system we designed.

The goal of the system is to simply remove iron out of the water and capture it in a separate tank. This stops iron from ever being used in the school’s irrigation.

These are the technical components in this particular bore water treatment system: 

  1. Dual tank sand traps that oxidise and separate the iron from the water.
  2. Water conditioner that improves the ionic structure of water so plants grow better
  3. Chlorination injection that delivers miniscule amounts of chlorine to reduce bacteria and organic particles.

Bore Water Treatment

Our preliminary water tests showed that the school’s bore water has a very high iron concentration in its ground water.

Test results from our water samples confirmed this and were the basis of the water treatment system we designed.

The goal of the system is to simply remove iron out of the water and capture it in a separate tank. This stops iron from ever being used in the school’s irrigation.

These are the technical components in this particular bore water treatment system: 

  1. Dual tank sand traps that oxidise and separate the iron from the water.
  2. Water conditioner that improves the ionic structure of water so plants grow better
  3. Chlorination injection that delivers miniscule amounts of chlorine to reduce bacteria and organic particles.
Bore water Treatment at Joondalup Primary School
Joondalup Primary Bore Water Treatment

Leftover Iron

All the iron that is removed from the bore water has to be captured somewhere. In this picture you can see dark brown water filling up a water tank. 

That brown colour is iron that would otherwise be distributed across school grounds and buildings. Instead the iron is backflushed out of the irrigation system and into its own tank. 

Iron is heavy and settles quickly. After eight to twelve hours the iron will sit at the bottom of the tank and the water above can be filtered out into ground sumps next to the tank. 

Over time the iron will accumulate at the bottom of the tank. It is a heavy and dark sludge which is removed and taken elsewhere for disposal.

It is easier and cheaper to catch and remove iron in this way than allow it stain buildings and property.

Joondalup Primary School Aerial View

The Visual Impact of Iron Staining

The aerial from Google Maps shows how buildings, roofs and paving next to sprinklers change colour due to iron staining. 

Overspray is always the reason unwanted staining occurs. 

In smaller areas it is more water-wise to replace sprinklers with subsurface drip irrigation. The same untreated bore water with high concentrations of iron and calcium will water plants and leave property untouched and clean.

Joondalup Primary School Aerial View 1

The Visual Impact of Iron Staining

The aerial from Google Maps shows how buildings, roofs and paving next to sprinklers change colour due to iron staining.

Overspray is always the reason unwanted staining occurs.

In smaller areas it is more water-wise to replace sprinklers with subsurface drip irrigation. The same untreated bore water with high concentrations of iron and calcium will water plants and leave property untouched and clean.

Melville Senior High School Iron Stain Removal

Melville Senior High School Stain Removal

Melville also has high iron levels in their groundwater.

We completed a stain removal job on limestone amphitheatre steps that overlooks their sports oval.

Joondalup Primary School Bore Water Treatment
Joondalup Primary School Iron Treatment System
Joondalup Bore water treatment
Joondalup Bore water treatment

Enquiry Form - 24 hr response

Please complete the form below to help us immediately start on your problem or situation.  

If you would like a call from a water treatment specialist, please include your contact number and indicate so in the comments section.

info@earthandwater.com.au

3/14 Brolo Ct, O'Connor 6163, WA