Solar Power at Trang Cambodia, 10KW System

In October 2017, I went to PKH Trang to inspect the installation of the 10KW Photovoltaic System. The system is working fine.

They have a high quality water filtration system with Reverse Osmosis.

Solar Two - Clean Water for an Orphanage

We installed a water filtration system for another orphanage in Cambodia. We used an ultra-membrane filter with pore size of 0.1 micron. It is able to remove bacteria and give clean water. It requires a minimum water presure of 2 bar to operate, hence we need to install an electric water pump before the filter so that it has enough pressure to operate the filter. A setback of this system is it requires regular back flushing in order to clean the filter to prolong the filter's life. Once the filter to clog up, it is time to replace a new filter. Suitable for making rainwater drinkable.

Visited a Boarding School in Pontianak, Indonesia

In 2005, I visited a boarding school in Pontianak, Kalimantan, Indonesia. I followed a church group who were visiting the school. My role was to study if it is possible to help them make their well water drinkable using a simple water filter system. I brought water samples back for testing and found that the water was acidic. This requires an additional process of neutralisation to raise the pH level of the water to 7.0 before filtering.

Also notice that the water was greenish in the toilet and latter realise that it was due to the acidity in the water attacking the copper pipes.

I did not recommend to install a simple water filter system as they need to address the low pH first.