Microbial degradation of formaldehyde in white mineral dispersions preserved with formaldehyde-releasing biocides
Microbial degradation of formaldehyde in white mineral dispersions preserved with formaldehyde-releasing biocides
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DOI：
10.1016/j.ibiod.2009.05.008
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发表时间：
2009-09
影响因子：
4.8
通讯作者：
N. Maiuta;Silvia Hubschmid;N. Giuliani;P. Schwarzentruber;C. Dow
中科院分区：
文献类型：
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作者：
N. Maiuta;Silvia Hubschmid;N. Giuliani;P. Schwarzentruber;C. Dow
两种不同的甲醛降解微生物，恶臭假单胞菌和扭脱甲基杆菌，分离自碳酸钙浆料含有甲醛释放生物杀灭剂（乙二氧基）二甲醇。针对每种微生物单独以及在混合培养物中，在肉汤和碳酸钙浆中研究了它们的相对甲醛生物降解和甲酸产生动力学。此外，测定了最小抑制浓度（MIC）。结果表明，在泥浆中，M. extorquens比P.putida更耐受甲醛。在浆料中，微生物诱导的甲醛氧化引起甲酸的暂时积累，这被认为是碳酸钙浆料悬浮体系的pH下降和不稳定的原因。此外，观察到残留甲醛浓度驱动浆料中的单个抗甲醛微生物的优势和恢复。总体而言，这项研究表明，碳酸钙浆料中甲醛的生物降解是由混合抗甲醛微生物种群的细菌属的交替优势引起的。
Two different formaldehyde-degrading microorganisms, Pseudomonas putida and Methylobacterium extorquens, were isolated from calcium carbonate slurry containing the formaldehyde-releasing biocide (ethylenedioxy) dimethanol. Their relative formaldehyde biodegradation and formic acid production kinetics were studied in broth and in calcium carbonate slurry for each microorganism individually, as well as in mixed cultures. Furthermore, the minimal inhibition concentration (MIC) was determined. The results indicated that in slurry, M. extorquens is more tolerant of formaldehyde than P. putida. In slurry, microbial-induced oxidation of formaldehyde caused a temporary accumulation of formic acid, which is presumed to be responsible for pH drop and destabilisation of the calcium carbonate slurry suspension systems. In addition, the residual formaldehyde concentration was observed to drive dominance and recovery of individual formaldehyde-resistant microorganisms in the slurry. Overall, this investigation indicated that biodegradation of formaldehyde in calcium carbonate slurry is brought about by alternating dominance of bacterial genera of mixed formaldehyde-resistant microbial populations.