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首页> 外文期刊>Water, Air, and Soil Pollution >BIODEGRADATION OF MONOETHANOLAMINE, ETHYLENE GLYCOL AND TRIETHYLENE GLYCOL IN LABORATORY BIOREACTORS
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BIODEGRADATION OF MONOETHANOLAMINE, ETHYLENE GLYCOL AND TRIETHYLENE GLYCOL IN LABORATORY BIOREACTORS

机译：实验室生物反应器中氨基乙醇胺，乙二醇和三乙二醇的生物降解。

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The release of alkanolamines and glycols into the subsurface soils poses a potential hazard to the environment through impacted soil and groundwater. This study investigated aerobic and anaerobic biodegradability of monoethanolamine (MEA), ethylene glycol (MEG) and triethylene glycol (TEG). Significant levels of MEA (31 000 mg/kg), MEG (500 mg/kg) and TEG (2100 mg/kg) were successfully aerobically biodegraded in bioreactors. The aerobic slurry experiments suggested initial phosphate (P) limitation, as biodegradation rates increased by one order of magnitude after phosphate addition. Anaerobic decay of MEA, MEG and TEG was unaffected by P-addition. MEA, MEG and TEG degradation products such as acetate, ethanol and ammonium at about 75 000 mg/kg, 8100 mg/kg and 8800 mg/kg degraded completely and did not prevent aerobic biodegradation. This study confirms proposed biodegradation pathways of MEA, MEG, TEG and their breakdown products in natural soil and groundwater using indigenous microbes. Levels of contamination studied here are significantly higher than previously reported.
机译：链烷醇胺和乙二醇释放到地下土壤中会通过受影响的土壤和地下水对环境构成潜在危害。这项研究调查了单乙醇胺（MEA），乙二醇（MEG）和三乙二醇（TEG）的好氧和厌氧生物降解性。在生物反应器中，好氧的MEA（31000 mg / kg），MEG（500 mg / kg）和TEG（2100 mg / kg）的水平成功地被好氧生物降解。有氧浆料实验表明了最初的磷酸盐（P）限制，因为添加磷酸盐后生物降解速率增加了一个数量级。 MEA，MEG和TEG的厌氧衰减不受P加成的影响。 MEA，MEG和TEG降解产物（例如醋酸盐，乙醇和铵）的浓度约为75000 mg / kg，8100 mg / kg和8800 mg / kg完全降解，并且不能防止需氧生物降解。这项研究证实了使用天然微生物在天然土壤和地下水中MEA，MEG，TEG及其分解产物的拟议生物降解途径。此处研究的污染水平明显高于先前报道的水平。

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