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Updated: May 28, 2026
09:49
Prospecting Microbial Strains for Bioremediation and Probiotics Development for Metaorganism Research and Preservation
Published on: October 31, 2019
Microbial ecological governance of 1,4-dioxane biodegradation under staged nutrient stimulation
Trang Vu1, Sifang Wang2, Zhu Wang3
1Department of Civil and Environmental Engineering, Northeastern University, Boston 02115, United States.
Water Research
|May 26, 2026
Summary
Nutrient sequencing, not just dose, is key for effective groundwater bioremediation. Staged nutrient addition guides microbial communities for durable 1,4-dioxane removal, outperforming simple high-dose strategies.
Area of Science:
- Environmental microbiology
- Bioremediation
- Groundwater remediation
Background:
- Nutrient amendment is a common in situ groundwater remediation technique.
- The influence of nutrient dose and sequence on microbial community assembly and biodegradation performance is not well understood.
- 1,4-dioxane is a persistent groundwater contaminant often found with chlorinated solvents.
Purpose of the Study:
- To investigate the microbial ecological mechanisms of staged nutrient stimulation for 1,4-dioxane biodegradation.
- To compare the effectiveness of different nutrient sequencing strategies and bioaugmentation.
- To understand how nutrient regimes shape microbial community structure and function.
Main Methods:
- Soil-groundwater microcosms were used to compare three treatment trains over 45 days.
- Treatment trains included different nutrient sequences: low-high-none (Train 1), high-none (Train 2), and high-none with bioaugmentation (Train 3).
- Microbial community assembly and biodegradation of 1,4-dioxane and chlorinated solvents were analyzed.
Main Results:
- Staged low-high-none nutrient sequence (Train 1) and bioaugmentation (Train 3) achieved significantly higher 1,4-dioxane removal (∼69% and ∼66%) compared to high-none (Train 2, ∼43%).
- Train 1 and Train 3 exhibited deterministic community assembly, while Train 2 showed stochastic drift after nutrient withdrawal.
- The staged nutrient regime acted as an ecological ratchet, enriching specific degraders and leading to stable, high-function microbial communities.
Conclusions:
- Staged nutrient stimulation critically influences microbial community trajectories and bioremediation durability.
- Nutrient sequencing is more important than nutrient dose alone for optimizing in situ bioremediation.
- Bioaugmentation can enhance bioremediation by acting as a catalyst for synergistic microbial consortia.
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