Bintaro Lama

This was the 3rd time I'm gonna go to a kampung. At first, I thought we're just gonna visit Bintaro Lama but we're also gonna make a slide show or a video about the 3 stations we're assigned to.
Nicholas, Nathan and I were at stations 1, 3 and 5. Station 1 introduces the sand filter, a thing which traps bacteria in the groundwater. How? Let's say that the groundwater gets poured in the sand filter and it passes through the sand, gravel and small rocks. Why does the sand filter need those solids? It's because they trap the bacteria while the ground water passes through it.
Station 3 shows another way to clean water through SODIS which I'm not sure of what it stands for but it's kind of like Solar Disinfection. Why is it called that way? It's because this process includes solar heating. First, you clean the water bottle( the water bottle should have no texture and should be transparent so when it dries in the sun, the heat will burn the germs in the bottled water) inside and outside, and then fill it with water( which came from the sand filter) . When the water goes on the top, make it overflow so that the oxygen feed on the germs. Then, you put it on a roof of a house so that the sun can burn the remaining germs. The bottle stays there for 6 hours. Station 5 shows the water quality test and the tubility test. First, they will show you a really long cylinder which is like a graduated cylinder and they will fill it with water. This is called the Turbidity Test. This test shows how clear is the water. How can you tell? On the bottom of the tube, there's an X sign so if you look through the tube and water, you can tell if you can see the X sign clearly. Another tool of measuring water's quality is called the PH4, a tool which measures acidity. P stands for percent and H stands for Hydrogen, and I don't really know what 4 stands for. On the PH scale, from numbers 0 to 14, water is simply the baseline which is in 7 and it also means that it's neither acidic or basic. Acidic things can be lemon or hydrochloric acid. Basic things can be soap or ammonia. And after we visited all 3 of the stations, we sang with the kampung kids a washing hands song, and then we washed our hands. After all of the jingle, we went on the buses and we went back to JIS.