5.1 Summary of Findings
Our air purifier system was successful as it purified the polluted air and decreased the high levels of carbon monoxide as can be seen from the graphs and charts above in the results section. It was constantly clearing the carbon monoxide in the surrounding air by halving the current values every 25 minutes. In the future, we would target at achieving for the time needed to halve the current level of carbon monoxide to be 15 minutes instead of 25 minutes. We would also target at making the air purification device automatic and for it to turn on by itself when the carbon monoxide levels are too high.
5.2 Comparison With Previous Research
None of the existing air purifiers in the market are a combination of water-based air purification and the HEPA filter. Our air purifying device is unique and is more effective in clearing the air of the haze pollutants.
Most air purifiers in the market can only clear pollutants that have a diameter that is larger than 0.3 micron meters (Becky Metivier, 2014). Thanks to the totobobo masks, our air purifying device can trap pollutants that have a diameter larger than 0.1 micron meters. This increases the effectiveness of our device.
The most expensive carbon monoxide sensor in the market is around $50 which is quite costly. Our carbon monoxide sensor is inexpensive and easy to put together as it only consists of a breadboard, an arduino, multiple wires and a MQ7 carbon monoxide sensor. All of this will only cost at most $20 as we use our own recycled box as the body of the sensor, which saves money.
If we had more time, we would probably be able to develop our system along with an LCD which allows the users to see the readings clearly without needing to connect the MQ7 carbon monoxide system. We would also be able to programme the system such that the air purifier system would automatically turn on when the carbon monoxide reading is too high. There are currently no other air purifier systems that have this characteristic.
5.3 Practical Applications
Singapore has an annual haze season and doing this project allowed us to understand this problem further and even try to find a solution to it. We also learnt more about the safety measures to take when faced with an unhealthy situation and these skills can be applied during the haze season when air quality turns bad.
This project also taught us to stay calm in a stressful situation and this can be applied to our daily lives when we need to meet datelines and also to have proper time management.
Learning about arduino is also very helpful in our lives because the world now revolves around physics and technology and having skills to programme the system will come handy in the future as technology becomes more advanced. For example, arduino can be used to turn on machines automatically and it can sense gases to measure its value
The most important thing we learnt is about safety in the laboratory. In the lab, there are many different experiments going on and because of that, we must always be aware of our surroundings. We must also be careful of our own experiment as there are many risks involved like the possibility of a short circuit or injuring ourselves. This learning can be applied to our SST 10Cs like collaboration and communication for without these two important Cs, our team would not have been able to function and succeed on this experiment.
5.4 Areas for further study
We can continue to find out and learn how to connect the air purifier system, arduino and carbon monoxide sensor system such that when the carbon monoxide sensor senses that the levels of carbon monoxide is higher than usual, the air purifier system will automatically turn on to purify the air.
We can also find out how to connect the liquid crystal display (LCD) to the arduino and learn how to programme the screen such that the carbon monoxide readings will be displayed on the screen and can be seen, instead of having to connect the carbon monoxide sensor to the computer every time, just to see the readings, which is very tedious and time consuming.
We can also research on more effective ways to purify the air because our model may work, but it’s not effective. Hence we will need to research on how to make our model more effective and design it accordingly to purify more air at one time.
One of our goals was to make our air purifier system environmentally friendly hence we can power it up with solar energy which is an alternative source of energy, which is green and clean. This will take research and further studies before we can actually archive this goal.