
Oxygen Not Included is a space-colony simulation game where players are tasked with ensuring the survival of their colony. Polluted oxygen is a type of oxygen that can be breathed by the colonists but is not ideal as it can cause illnesses such as Slimelung. While some players opt to simply live with polluted oxygen, there are several methods to remove it, including using deodorizers, air pumps, and filters, or converting it into liquid oxygen.
| Characteristics | Values |
|---|---|
| How to get rid of polluted oxygen | Use deodorizers, air pumps, and filters |
| Deodorizer placement | In/around the base, near sources of pollution, in wild areas outside the base, near anything that produces polluted oxygen |
| Deodorizer mechanism | Converts polluted oxygen into oxygen, needs to be refueled with filtration medium |
| Deodorizer limitations | May not completely eliminate polluted oxygen, may require multiple deodorizers |
| Alternative methods | Cool and condense polluted oxygen into liquid oxygen, use pufts (animals that consume polluted oxygen), vent polluted oxygen into space, use filtration to clean polluted water |
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What You'll Learn

Using deodorizers to filter the air
Deodorizers are an effective way to filter polluted oxygen and improve air quality. They are available in various forms, such as sprays, candles, and plug-ins, each designed to tackle unpleasant odours. Deodorizers work by releasing fragrances or scents that mask unpleasant odours. While they can effectively provide a fresh scent, they do not address the source of the odour or remove pollutants from the air.
To utilize deodorizers effectively for filtering polluted oxygen, consider the following:
- Place deodorizers near sources of polluted oxygen, such as slime biomes or areas with polluted water or dirt.
- Incorporate deodorizers into your ventilation system or air pumps to consolidate the polluted oxygen in a specific area for easier management.
- Use deodorizers in combination with other methods, such as air filters or purifiers, to enhance their effectiveness.
- Regularly clean or replace deodorizers to prevent the buildup of pollutants and maintain their efficiency.
- Consider natural deodorizing options, such as plants, which can absorb pollutants and release fresh oxygen while also providing aesthetic value.
It is important to note that while deodorizers can help manage polluted oxygen, they may not be a long-term solution. For comprehensive air purification, combining deodorizers with other air filtration systems is recommended. Additionally, addressing the root cause of the polluted oxygen, such as improving airflow or properly disposing of polluted water, should be prioritized.
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Storing polluted water underwater
Polluted water is a common issue, especially in the context of video games like Oxygen Not Included, where it is produced by various activities and can have negative effects on the health and stress levels of characters. It is also a significant issue in the real world, with water pollution affecting our rivers, reservoirs, lakes, and seas, and jeopardising human health.
When it comes to storing polluted water underwater, there are several strategies that can be employed:
Firstly, it is important to separate polluted water from clean water sources to prevent contamination. This can be done by creating two cisterns, one for fresh water and one for polluted water. The polluted cistern should be located below the fresh cistern to minimise the risk of accidental mixing.
Secondly, to prevent the spread of germs and microbes, it is crucial to keep polluted water away from oxygen. One effective method is to use a bottle emptier to transfer polluted water from wash basins into a hole where carbon dioxide (CO2) accumulates. The heavy CO2 inhibits the growth of microbes, allowing for safe storage of polluted water.
Additionally, certain creatures like Gulp Fish can be utilised to convert polluted water into clean water. This natural method can help reduce the overall volume of polluted water that needs to be stored.
Another strategy is to use a Water Sieve to filter polluted water into clean water. This process involves combining polluted water with sand or regolith, resulting in the production of clean water and polluted dirt as a byproduct. The polluted dirt can then be managed separately.
It is worth noting that simply storing polluted water underwater without proper containment or isolation from oxygen may not be effective. In some cases, polluted water can emit polluted oxygen, which can then infect the surrounding area. Therefore, it is crucial to implement measures that prevent the spread of pollution and protect the oxygen supply.
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Venting polluted oxygen into space
In the game Oxygen Not Included, polluted oxygen is dirty, unfiltered air that is breathable but can cause the "Yucky Lungs" debuff, increasing the air consumption rate and causing coughing. It can also cause food nearby to rot at a faster rate. It is the primary vector for the transmission of Slimelung germs, which can cause Yucky Lungs, and other germs.
To effectively manage polluted oxygen, it is important to identify and address the source. Storing slime and polluted dirt underwater and properly disposing of and storing polluted water can help reduce the amount of polluted oxygen in your base. Additionally, placing deodorizers in all the places that stuff can settle, as well as anywhere that produces polluted oxygen, can help to slowly transform polluted oxygen into oxygen.
Another method to get rid of polluted oxygen is to cool and condense it into liquid oxygen and then heat it back up. This process can be achieved using an installation involving Thermo Regulators and hydrogen. First, the hydrogen is cooled to a temperature below oxygen's condensation point of -183°C using thermo nullifiers and thermo regulators. Then, the cooled hydrogen is piped through the polluted oxygen using a radiator system, allowing for a heat transfer that causes the polluted oxygen to condense into a liquid while the hydrogen heats up.
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Using air pumps to transport to a filter
Polluted oxygen can be managed by using air pumps to transport it to a filter. This method is particularly useful if you have a lot of polluted oxygen to deal with.
Firstly, identify the source of the polluted oxygen. This could be a slime biome or polluted water sources. Place air pumps strategically around the source of the pollution, focusing on areas with high concentrations of polluted oxygen. Ensure the pumps are placed at various heights and horizontal locations to maximise their reach.
The air pumps will draw in the polluted air and transport it to the filtration system. To do this, a network of gas pipes is used to connect the air pumps to a central filtration unit. Gas pipes are essential for transporting the polluted oxygen from the pumps to the filter. Ensure that the pipes are properly connected and directed towards the input of the filter.
Once the polluted oxygen reaches the filtration unit, it will be separated into different gases. The clean, non-polluted oxygen will be released through the standard green output of the filter and can be distributed back into your base. The orange output will contain the remaining polluted oxygen that was filtered out.
This method can be used in conjunction with other strategies, such as using deodorizers to convert PO2 into O2. Deodorizers are a popular and cost-effective option that can be placed near sources of polluted oxygen or in rooms with high concentrations of it.
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Cooling and condensing into liquid oxygen
One of the ways to deal with polluted oxygen is to cool and condense it into liquid oxygen. This process involves lowering the temperature of the oxygen to a critical temperature of -181.5°F (-118.6°C or 154K), at which point it transitions from a gas to a liquid state. This method of dealing with polluted oxygen is mentioned in discussions around the video game Oxygen Not Included, where players discuss strategies to manage their colony's oxygen supply and deal with polluted oxygen.
To condense oxygen into a liquid state, several steps are required. Firstly, oxygen must be compressed and any moisture must be removed. Then, the oxygen is cooled through a regenerator, and impurities are removed through a side bleed gel trap. The oxygen is then swirled through a phase separator to further separate it from other gases and impurities. Finally, a fractional distillation process is applied to obtain relatively pure liquid oxygen. It is important to note that this process requires specialised equipment and should not be attempted without proper knowledge and safety precautions due to the dangers associated with liquid oxygen, such as causing frostbite and making other materials more flammable.
One method that has been suggested involves using liquid nitrogen to cool oxygen. In this process, a test tube is clamped and placed in a bath of liquid nitrogen. Rubber tubing is connected to an oxygen cylinder, with the other end connected to a piece of glass tubing placed inside the test tube. By slowly releasing oxygen from the cylinder, liquid oxygen will begin to condense in the test tube due to the low temperature of the liquid nitrogen. This method requires careful control of the flow rate to ensure a slow and gentle flow of oxygen.
Another suggested method involves using a soda bottle with a bicycle valve installed on the cap. The bottle is pressurised using a bicycle pump and then placed in a freezer. This process is repeated in cycles, releasing the valve after each cycle. While this method may not achieve the extremely low temperatures required to condense pure oxygen, it may be possible to liquefy air, which contains nitrogen and oxygen, using this approach. However, it is important to note that even household freezers may not reach the required temperature, and more sophisticated equipment may be necessary.
It is important to note that liquid oxygen should be handled with care. If you have leftover liquid oxygen, it should be disposed of properly by pouring it over a non-combustible surface and allowing it to evaporate into the air. Additionally, when dealing with polluted oxygen, it is crucial to address the source of the pollution and improve airflow in the affected areas. Deodorizers and air filters can also be used to remove pollutants and improve air quality.
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Frequently asked questions
Polluted oxygen is a type of oxygen that is breathable but not as efficient for breathing as regular oxygen. It can also cause diseases like Slimelung and other germs.
There are several ways to get rid of polluted oxygen. One way is to use deodorizers to filter the air. Another way is to pump the polluted oxygen into a small room and use a deodorizer to convert it into oxygen. You can also vent polluted oxygen into space or let Pufts roam your base to consume it.
To prevent the spread of polluted oxygen, ensure proper disposal and storage of polluted water and dirt. You can also use air pumps to transport polluted oxygen to a filter or storage tank.











































