ACCELERATION OF 2,4,6-TRICHLOROPHENOL BIODEGRADATION THROUGH AEROBIC AND ANAEROBIC CONDITION ALTERNATION

LIANG Bin; FENG Shi-min; ZHANG Yong-ming

doi:10.13205/j.hjgc.202111010

Volume 39 Issue 11

Jan. 2022

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LIANG Bin, FENG Shi-min, ZHANG Yong-ming. ACCELERATION OF 2,4,6-TRICHLOROPHENOL BIODEGRADATION THROUGH AEROBIC AND ANAEROBIC CONDITION ALTERNATION[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(11): 83-88. doi: 10.13205/j.hjgc.202111010

Citation:

LIANG Bin, FENG Shi-min, ZHANG Yong-ming. ACCELERATION OF 2,4,6-TRICHLOROPHENOL BIODEGRADATION THROUGH AEROBIC AND ANAEROBIC CONDITION ALTERNATION[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(11): 83-88. doi: 10.13205/j.hjgc.202111010

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ACCELERATION OF 2,4,6-TRICHLOROPHENOL BIODEGRADATION THROUGH AEROBIC AND ANAEROBIC CONDITION ALTERNATION

doi: 10.13205/j.hjgc.202111010

1. MYJ Chemical Co., Ltd, Puyang 457000, China;
2. School of Environmental and Geographical Science, Shanghai Normal University, Shanghai 200234, China

Received Date: 2021-06-08
Available Online: 2022-01-26

Abstract

Abstract

2,4,6-trichlorophenol (TCP) is a recalcitrant organic compound, and reductive dechlorination is the key step for biodegradation of TCP, which is usually carried out in anaerobic conditions. Chloride ion in the para-position of TCP is harder to remove compared to Cl in the ortho-position, which means that 4-chlorophenol (4-CP), an intermediate of TCP reductive dechlorination, is difficult to further biodegrade in anaerobic conditions. However, the 4-CP was effectively biodegraded when the anaerobic mode was switched into an aerobic mode. Based on this advantage of alternating between anaerobic and aerobic modes, a vertical baffled bioreactor (VBBR) was employed for TCP biodegradation. Compared with anaerobic biodegradation alone, alternating between anaerobic and aerobic modes significantly enhanced TCP biodegradation. For an initial TCP concentration of 50 μmol/L, the time for complete removal of TCP was shortened from 34 h to less than 12 h. The mechanism was the relief of inhibitions by TCP-biodegradation intermediates. For example, phenol, an intermediate of 4-CP reductive dechlorination, got more rapid biodegradation in the aerobic mode, which relieved its inhibition and enhanced the biodegradation of TCP in the anaerobic mode.
- 2,4,6-trichlorophenol,
- reductive dechlorination,
- biodegradation

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References(24)

References

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