ArticleApplied microbiology and biotechnology2025
Microaerobic biodegradation of aromatic hydrocarbon mixtures: strategies for efficient nitrate and oxygen dosage.
Article in Applied microbiology and biotechnology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The biodegradation of organic aromatic compounds in subsurface environments is often hindered by limited dissolved oxygen. While oxygen supplementation can enhance in situ biodegradation, it poses financial and technical challenges. This study explores introducing low-oxygen concentrations in anaerobic environments for efficient contaminant removal, particularly in scenarios where coexisting pollutants are present. An innovative strategy of alternating nitrate-reducing and microaerobic conditions to stimulate biodegradation is proposed, utilizing nitrate initially to degrade easily-degradable compounds, and potentially reducing the need for additional oxygen. Batch experiments were conducted to assess the biodegradation of a BTEX, indene, indane, and naphthalene mixture using groundwater and sediments from an anaerobic contaminated aquifer. Two set-ups were incubated for 98 days to assess the redox transitions between microaerobic (oxygen concentrations < 0.5 mg O
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