Abstract
Formaldehyde is harmful to human beings. It is widely used in chemical industry, medicine, and agriculture and is frequently discharged into the sewage. Microbial metabolism of formaldehyde has attracted increasing attention for its potential application in formaldehyde removal, especially for indoor gaseous formaldehyde degradation. Methylobacterium sp. XJLW capable of degrading formaldehyde was isolated and exhibited a strong activity for liquid formaldehyde degradation. In the present study, the survival rate of XJLW was evaluated under drought, 30°C, 4°C, 15°C, 35°C, and 40°C. After 4days, the average survival rate under 30°C is the greatest (83.97%) among the five temperatures. Whether the temperature was above or below 30°C, the average survival rate decreased significantly. However, the resistance of XJLW to reduced temperatures seemed better than that to increased temperatures. The average survival rate under 15°C and 4°C was 71.1% and 58.67%, while that under 35°C and 40°C was 49.47% and 0.1%. Two batches of gaseous formaldehyde treatments were carried out in an analog device with super absorbent polymer (SAP) as the carrier materials of XJLW. The results showed that XJLW could effectively degrade gaseous formaldehyde in the analog device for a long period.
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