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#biosparging

2 public questions tagged with this topic.

Bioremediation

Biosparging primarily promotes:

Principal benefit of biosparging lies in stimulating rapid aerobic biodegradation within otherwise anaerobic groundwater by resolving oxygen limitation that constrains metabolic energetics. Most petroleum hydrocarbon catabolic routes depend on iron-containing monooxygenases and Rieske dioxygenases inserting molecular oxygen into inert C-H bonds of alkanes forming alcohols and aromatic rings forming catechols, reactions impossible without O2 as cosubstrate. Products funneled via beta-oxidation and ortho cleavage into TCA cycle generating high ATP yield. Under anoxia, degradation relies on slowe

Ref: Vidali Bioremediation review 2001 aerobic pathways; EPA Biosparging enhances aerobic degradation; PubMed PMID 14767740 rates.

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Bioremediation

Biosparging involves:

Biosparging constitutes in situ groundwater remediation targeting dissolved and sorbed petroleum hydrocarbons in saturated zone where natural oxygen typically depleted below 1 mg per L. Technology injects air, pure oxygen or microbubble oxygen-emitters at pressures slightly above hydrostatic 5 to 15 psi through wells placed 5 to 10 feet below plume. Bubbles rising dissolve oxygen up to 8 to 10 mg per L per Henry's law and partition volatile BTEX upward to vadose zone for capture by soil vapor extraction. Aerobic bacteria Pseudomonas putida and Rhodococcus carrying xylene monooxygenase and cate

Ref: EPA Biosparging Design Guidance 1994; Leeson et al. Air Sparging Principles; PubMed biosparging review PMID 10463012.

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