Sylvie Willis
Algae require sunlight for growth, so it is impossible for it to grow inside a fuel tank. However, what people often refer to as algae in their fuel tanks is actually a form of microbial growth, which includes bacteria, mould, and fungi. These microbes enter the tank when water does, and they feed on the fuel, creating a sludge that can clog filters and cause engine damage. To prevent this, it is important to regularly test for microbes and water, and to treat the tank with biocides or other chemicals to kill the microbes.
| Characteristics | Values |
|---|---|
| What is it? | "Algae" in a fuel tank is not actually algae but a buildup of microbes such as bacteria, mold, and fungus. |
| How does it grow? | Algae requires sunlight to grow, so it cannot grow in a fuel tank. However, microbes can grow in the presence of water, air, and temperature. |
| How to prevent it? | Use fuel stabilizers, fuel polishing systems, and biocides to prevent and treat microbial growth. Regular testing is also important. |
| How to treat it? | Remove water from the tank, clean the tank, and use biocides to kill the microbes. Replace fuel lines, fittings, and filters. |
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What You'll Learn
- Algae is actually a buildup of microbes like bacteria, mould, and fungi
- Water in the tank creates favourable conditions for these microbes
- Biocides can be used to kill active microbial contamination
- Fuel stabilisers can prevent the growth of bacteria and other microbes
- Regular testing can keep your diesel tank free of microbes and sludge
Algae is actually a buildup of microbes like bacteria, mould, and fungi
While the growth in fuel tanks is often referred to as "algae", it is actually a buildup of microbes like bacteria, mould, and fungi. This sludge-like substance is a common contaminant in diesel fuel tanks, causing issues for vehicles and equipment.
Diesel fuel is susceptible to contamination, and one of the most frequent problems faced by diesel users is microbial growth, or "diesel algae". This growth is not actually algae, as algae require sunlight to grow, which is absent in the dark confines of a diesel tank. Instead, the sludge found in diesel tanks is the result of microbial activity, specifically bacteria, mould, and fungi. These microbes enter the tank through condensation or water ingress, and they thrive in the presence of water and diesel fuel, their source of food.
The microbes form colonies and produce waste products that can lead to corrosion and engine damage. They can also create a slimy film that coats fuel tanks and lines, impeding fuel flow and causing equipment malfunctions. It is crucial to address this issue promptly, as the microbial growth can render diesel fuel unusable and lead to costly repairs.
To prevent and address diesel algae, several measures can be taken. Firstly, regular testing and maintenance are essential. Microbe tests, such as ATP testing, should be conducted annually to detect microbial growth early on. Additionally, fuel stabilizers can be used to prevent bacterial growth, especially when the engine is inactive for extended periods. Proper maintenance includes keeping the fuel system clean and dry, as water creates favourable conditions for microbial growth.
If microbial growth is detected, treatment options are available. Biocides, or chemicals that kill bacteria and other contaminants, are commonly used to address diesel algae. However, biocides should be used cautiously and in regulated amounts, as overuse can lead to the development of biocide-resistant microbes and potential corrosion of the fuel system. Mechanical processes, such as using a mobile fuel polishing system to circulate, filter, and return the fuel, can also help eliminate water and microbes from the tank.
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Water in the tank creates favourable conditions for these microbes
While algae cannot grow inside a diesel fuel tank due to the absence of sunlight, microbes such as mould, bacteria, and fungi can thrive in such environments. These microbes require both food and water to survive, and diesel fuel provides them with the necessary resources. Water creates favourable conditions for these unwanted microbes to grow and establish colonies, leading to potential issues with the diesel fuel and the tank itself.
Water can enter the tank through various means, including condensation caused by temperature fluctuations or during the refuelling process. This water settles at the bottom of the tank, creating an ideal environment for microbes to reproduce and feed on the diesel fuel. The presence of water and diesel fuel forms a separation, allowing bacteria to thrive in the water while obtaining their food source from the fuel.
The microbes produce waste products that can lead to corrosion and engine fouling. Additionally, they can create a slimy film that coats the fuel tanks and lines, reducing fuel flow and causing equipment malfunctions. Therefore, it is crucial to address the presence of water in the fuel tank to prevent microbial growth and maintain the proper functioning of the diesel engine.
To prevent and mitigate the growth of microbes, several measures can be taken. Regular testing and treatment cycles are essential to keep the diesel tank free of sludge and water. This involves hiring companies to conduct testing and sending samples to third-party laboratories for accurate results. Additionally, fuel additives can be used to remove water from the fuel, and the water separator should be drained frequently.
In cases of microbial contamination, the use of biocides is recommended. However, biocides should be used cautiously as they can lead to the development of biocide-resistant strains of microbes if overused. Proper care and maintenance of the diesel tank, including keeping it clean and using fuel stabilizers, can go a long way in preventing microbial growth and maintaining the health of the diesel engine.
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Biocides can be used to kill active microbial contamination
Although algae cannot grow inside a diesel fuel tank due to the absence of sunlight, microbes like mould, bacteria, and fungi can contaminate the fuel. These microbes feed on the hydrocarbons in the diesel fuel and produce waste products that can cause corrosion and engine fouling. They can also create a slimy film that coats fuel tanks and lines, reducing fuel flow and causing equipment to malfunction. This substance is often referred to as "diesel algae" or "diesel bacteria".
To ensure the best outcome, a multi-stepped approach is often necessary. This includes treating the problem with biocides, cleaning the tank to remove dead microbes and biomass, and implementing a fuel quality management (FQM) program to prevent future issues. Additionally, it is important to test for the presence of microbes and water in the tank before treatment. Regular testing should also be implemented after treatment to keep the diesel fuel tank sludge and water-free.
One example of a biocide product is Biobor JF, which has high fuel solubility and can effectively blend with fuel. However, it is important to note that even the best biocides might require a follow-up application to completely eliminate the microbial problem.
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Fuel stabilisers can prevent the growth of bacteria and other microbes
While algae cannot grow inside a diesel fuel tank due to the absence of sunlight, microbes such as bacteria, mould, and fungi can contaminate the fuel. These microbes enter the tank through vents or during filling and thrive in the presence of water and food sources like diesel fuel. The resulting biomass, often referred to as "diesel algae," can cause significant issues, including clogged filters, engine damage, and reduced fuel flow.
To prevent microbial growth and the costly problems it creates, fuel stabilisers can be used. Fuel stabilisers are additives that help maintain fuel quality and performance over time. They work by inhibiting the growth of bacteria and other microbes, which is essential since microbes can lead to product loss, liability issues, and Microbial Influenced Corrosion (MIC).
One type of fuel stabiliser is a biocide, a chemical additive that controls and prevents microbial contamination. Biocides are effective at treating microbial growth, but their overuse can lead to the development of biocide-resistant microbes and potential harm to the fuel system. Therefore, it is important to use biocides in combination with other methods, such as proper maintenance and tank cleaning.
Other ways to prevent microbial growth include limiting the amount of water in the tank, using fuel tank insulation to stabilise fuel temperature, and equipping fuel tank vents with filters to prevent the entry of bacterial and fungal spores. Regular tank cleaning, maintenance, and inspection are also crucial in preventing microbial contamination.
By using fuel stabilisers and adopting preventative measures, diesel fuel tank owners can effectively inhibit the growth of bacteria and other microbes, maintaining the health and performance of their fuel systems.
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Regular testing can keep your diesel tank free of microbes and sludge
Although algae cannot grow inside a diesel fuel tank due to the absence of sunlight, microbes such as mould, bacteria, and fungus can contaminate the fuel and cause extensive damage. This contamination is often referred to as diesel "algae". Regular testing can help prevent and address this issue, keeping your diesel tank free of microbes and sludge.
Testing is crucial to identify the presence of microbes and water in your diesel fuel tank. You can purchase bacteria tests or hire a company to collect samples and send them to a third-party lab for accurate results. By regularly testing your diesel fuel, you can detect potential issues early on and take preventive measures.
If testing reveals the presence of microbes, you can employ targeted treatments such as biocides, which are chemicals that kill bacteria and other contaminants. However, it is important to use biocides sparingly as overuse can lead to the development of biocide-resistant microbes. Additionally, biocides are toxic and can harm other components in your fuel system.
To prevent microbial growth, you can use fuel additives that eliminate water from the fuel, breaking down the layers that microbes thrive in. Mobile fuel polishing systems can also be used to circulate, filter, and return the fuel to your tank. Maintaining your fuel tank by regularly cleaning it and using high-quality diesel fuel can also help prevent the buildup of debris, sediment, and contaminants.
By implementing regular testing and following through with appropriate treatments, you can effectively keep your diesel tank free of microbes and sludge. This proactive approach will help you avoid the costly repairs and engine issues associated with diesel "algae" contamination.
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Frequently asked questions
Algae is commonly referred to as diesel "algae", however, it is not actually algae but microbial growth. This microbial growth requires water to grow and thrive. Water can enter your tank in different ways, such as condensation, and when it does, you run the risk of microbial growth.
You can buy a bacteria test to determine what's inside the tank. Some companies will test for microbes and the presence of water at the bottom of the tank. You can also do a microbe test on the stored fuel at least once a year.
To get rid of algae in your fuel tank, you must first remove the water and clean your tank out. Then, use a biocide to kill the active microbial contamination.
