Biological Oil Remediation Explained

Oil and fuel spills are not just messy, they create safety hazards, threaten the environment, and drive up operating costs thanks to waste handling costs, separator clean-outs, and downtime. Biological remediation offers a smarter alternative: products that deploy selected, naturally occurring, bacteria designed to digest hydrocarbons into harmless by-products, typically CO₂ and water, while you keep operations moving.

In this guide, we explain how our industry tested biological products - such as OT8, Bio LF, Bio TA, Forecourt Bio, OT8 FC, Bio Tubes, Bio Gel, and S‑Oil Treat - work at the microbiological level, when to use each product, and the best practices to maximise results. We also share real-world outcomes from forecourts and fuel depots, plus customer feedback, so you can see the performance in context.

In a Netherlands forecourt trial using Forecourt Bio, Bio Tubes, and OT8, oil separator discharges were reduced by over 95% over six months.
In a Scottish fuel depot, Bio Tubes delivered a greater than 98% reduction in hydrocarbon discharge within the first month of a six‑month trial, translating directly into savings on waste disposal, separator cleaning, and Consent to Discharge management charges.

The Microbiology: How our bacteria cultures eat hydrocarbons

Our biological products incorporate specially selected bacteria cultures. Given the appropriate conditions, these microbes use oil hydrocarbons as a food source, converting them into water and CO₂. Crucially, they keep working as long as oil is present, so stains and residues disappear over time rather than reappearing after rinsing.

What the bacteria need to thrive:

Food source: petroleum hydrocarbons (diesel, petrol/gasoline, lube oil, even heavy crudes)
Warm conditions: temperature influences metabolic rate, digestion speeds up as temperatures rise
Moist conditions: water is essential for microbial activity
Oxygen: supports aerobic degradation of petroleum hydrocarbons

When these conditions are in place, the bacteria in our products digest contamination to completion, rather than simply dispersing or masking it. The strains used are Euro Type 1, classified as safe for long‑term laboratory application and general public exposure, adding an extra layer of reassurance for facilities, staff, and the public.

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Where can our biological products be used?

Hard surfaces such as concrete and block paving - OT8
Tarmac and asphalt – Bio TA
Heated parts washers and industrial cleaning – Bio LF
Forecourt islands, pumps and floors – Forecourt Bio
Oil contamination on road surfaces – Road Bio LF
Industrial floor with oil stains – OT8 FC
Degreasing Small Areas, Equipment & Hand Rails – OT4
Oil Separator Bioremediation for continuous digestion – Bio Tubes
In-situ treatment for gravel, stones, and topsoil - Bio Gel
Oil contamination on soil and sand – S-Oil Treat and Nutrient 8

Real world benefits of biological degreasing

Biological oil remediation helps reduce overall costs. By actively breaking down hydrocarbons in rinse water and separators, biological products have been shown to cut oil discharge by up to 95% in real-world trials. This means fewer tanker call-outs, lower disposal fees, and longer intervals between separator servicing. In addition, products like Bio Gel allow you to treat contaminated gravel and soil on-site, avoiding the expense and disruption of excavation and transport.

Compliance and risk management are also improved. Lower hydrocarbon levels in separator effluent help sites stay within permitted discharge limits, reducing the risk of fines and regulatory issues. These products are also safer to use as they are non-flammable, have negligible VOC content, and contain bacteria classified as safe for public exposure, supporting health and safety goals.

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Operational continuity is another advantage. Biological cleaners fit easily into existing cleaning routines without requiring special transport or handling. This means maintenance teams can keep working without downtime.

Finally, these solutions support sustainability. They convert hydrocarbons into harmless CO₂ and water, reducing reliance on harsh chemicals. Documented reductions in separator discharge and waste volumes provide measurable data for environmental audits.

Best Practices: Getting the most from biological cleaners

Biology works best when the right conditions are in place. Here are some practical tips to make sure you get the most out of these products:

Start by preparing the surface. Remove any excess oil using absorbents or a vacuum system before applying the cleaner. This ensures the bacteria can focus on breaking down the remaining contamination that can’t be easily removed.
Next, create an environment where the bacteria can thrive. They need warmth, moisture, and oxygen. Pre-wet the area before applying the product, keep it damp during the treatment, and for larger stains, cover with a plastic sheet to hold in heat and humidity.
Choose the right product for the job. For example, use OT8 for concrete and block paving, Bio TA for tarmac and asphalt, Forecourt Bio for forecourt areas and equipment, OT8 FC for oily factory floors, Bio Gel for gravel or soil , and Bio Tubes for separators.
Give the product time to work. Follow the dwell time instructions. Brushing helps expose fresh oil to the bacteria.
Check the chemical environment too. Extremely acidic or alkaline conditions can slow down or stop biological activity, so avoid harsh chemicals when using biological products in separators.
Temperature matters. In colder weather, allow more time, use warm water at around 37°C where possible, and consider covering the area to keep it warm.
Finally, track your progress. Record separator discharge levels before and after using these products. Many users see significant improvements that justify the investment.

Applications and case studies

These examples show how biological cleaning solutions deliver measurable results in different settings.

At fuel depots in Scotland, separators were struggling with high hydrocarbon loads, driving up disposal costs and compliance risks. By introducing Bio Tubes as part of a six‑month trial, the sites saw dramatic improvements. Within the first month, hydrocarbon levels dropped from 670 µg/L and 2,820 µg/L to less than 10 µg/L—a reduction of more than 98%. This meant immediate savings and a stronger compliance position.

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In the Netherlands, a busy five‑island petrol station faced constant diesel and petrol drips, leading to frequent separator servicing. The solution combined routine cleaning with Forecourt Bio, targeted stain removal using OT8, and separator bioremediation with Bio Tubes. Over six months, oil separator discharges fell by 95%, allowing longer service intervals and improving environmental performance.
Residential and light commercial sites also benefit. One customer tackled mixed oil contamination on block paving and concrete, including an eight‑month‑old diesel spill, using OT8. After two light applications and a quick rinse, the stains were virtually gone in about an hour, a result that can be repeated on typical driveways and yards.

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For rail sidings and bunded storage areas, where gravel and soil are often contaminated, Bio Gel offers an in‑situ solution. Instead of costly excavation, the gel is applied at around 2 litres per m², kept moist for 48 hours under a plastic sheet, and left to work for up to 30 days. Turning the material and adding nutrients for heavy contamination can enhance results. This approach digests hydrocarbons on site, avoiding transport and disposal costs while minimising disruption.

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The Key Takeaways

Bioremediation is a performance driven yet economical way to manage oil and fuel contamination:

It eliminates hydrocarbons rather than moving the problem elsewhere.
It reduces separator discharges and cuts waste handling costs.
It maintains operational continuity across forecourts, depots, workshops, and infrastructure.

Ready to take the next step?

Whether you manage a forecourt network, a distribution depot, a rail yard, or an engineering workshop, we can help you assemble the right biological toolkit - from OT8 and Bio TA to Bio LF, Forecourt Bio, OT8 FC, Bio Tubes, and Bio Gel - for consistent results, season after season.

Tel: +44 (0) 1561 361515 Email: info@oiltechnics.com

Oil Technics Ltd., Linton Business Park, Gourdon, Aberdeenshire, Scotland UK DD10 0NH [View Map]