For low-to-moderate hydrocarbon contamination across large soil volumes, biological remediation is the most cost-effective route we offer naturally occurring microbes, accelerated and monitored, doing the work that would otherwise take chemical or mechanical intervention to achieve.
In-situ bioremediation works by injecting microbial consortia and nutrient amendments, typically NPK-based fertilisers, directly into contaminated soil, then aerating the treatment zone through vertical vent wells. Moisture is managed and checked throughout, since arid soils dry out fast and low moisture slows biodegradation down. Where excavation is the better option, ex-situ landfarming spreads contaminated soil across lined treatment beds, tilled regularly and dosed with nutrients and bioactivators.
Our Key Focus Areas
Biological treatment is most effective in sandy soils with moderate permeability, which is exactly the profile common across much of Qatar’s affected industrial land. On-site biopiles and landfarming zones are monitored for temperature, oxygen and microbial activity for 60 to 180 days depending on site conditions, with progress tracked against real field data rather than guesswork. Qatar University field trials at the Dukhan dump site and the Al Zubarah coast recorded 53% removal of total petroleum hydrocarbons in biopiles using selected indigenous strains over 90 days, against 30% from natural self-purification over the same period.
3–12
Typical remediation timeframe, in months, for in-situ bioremediation of sandy soils.
- Month Treatment Window
60–180
Monitoring period, in days, for on-site biopiles and landfarming zones tracking temperature, oxygen and microbial activity.
- Day Monitoring Window
*Industry benchmark for petroleum sludge and weathered hydrocarbon residues via ex-situ landfarming (Stepanova et al., 2022), applied as our design target: 60–80% biodegradation within six months.
What You’ll Get
Biological remediation trades speed for cost efficiency and a lighter environmental footprint. It is the right call when your project timeline can absorb it.
Microbial & Nutrient Injection
NPK-based nutrient amendments and microbial consortia injected with vertical vent well aeration.
Landfarming or Biopiling
Lined treatment beds, regular tilling and moisture regulation for excavated soil, or on-site biopiles where excavation isn’t needed.
Progress Monitoring
Temperature, oxygen and microbial activity tracked for 60–180 days against documented biodegradation benchmarks.
Frequently Asked Questions
Common questions about our biological remediation service, process and MOECC compliance.
Microbial consortia and NPK-based nutrient amendments are injected directly into contaminated soil, with aeration provided through vertical vent wells. Moisture is monitored and adjusted throughout, since biodegradation stalls without it.
Landfarming excavates contaminated soil and spreads it across lined treatment beds for regular tilling and nutrient dosing. Biopiling treats soil in constructed piles on-site, monitored for temperature, oxygen and microbial activity without full excavation.
In-situ bioremediation of sandy soils typically runs 3–12 months depending on contamination depth and concentration. Landfarming has documented biodegradation rates of 60–80% within six months for petroleum sludge and weathered hydrocarbon residues.
It’s most effective in sandy soils with moderate permeability and low-to-moderate hydrocarbon contamination. Hotspots with high benzene, toluene or naphthalene concentrations are usually better addressed with In-Situ Chemical Oxidation, sometimes alongside biological treatment for the wider site.
Biopiles and landfarming zones are monitored for temperature, oxygen and microbial activity throughout the treatment window, with post-remediation soil sampling and laboratory analysis confirming the final result against MOECC cleanup targets.