Study on biodegradation of 2, 4-DCP by anaerobic sludge acclimated by mixed mono-chlorphenols

Wen Zhang, Ling Chen, Jun Ping Ji, Si Qing Xia

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose of this study was to determine the treatability of 2, 4-dichlorophenol (2, 4-DCP) by anaerobic granular sludge which was acclimated by mixed mono-chlorphenols (2-CP, 4-MCP). The characteristic of degradation of 2, 4-DCP by anaerobic sludge acclimated by mixed mono-chlorphenols was investigated through shake flask study and performance of continuous flow anaerobic bioreactors. The difference of degradation of 2, 4-DCP by acclimated and unacclimated sludge was also compared. 2, 4-DCP was degraded at 50 h and 180 h respectively for acclimated and unacclimated sludge, which testified that acclimated sludge could more effectively degrade 2, 4-DCP. Although the intermediate product 4-MCP was present in both reaction system, 4-MCP could be degraded completely after 400 h in the acclimated sludge but accumulated in the unacclimated sludge. Therefore, acclimation by the mixed mono-chlorphenols (2-CP, 4-MCP) could enhance the ability of para-and meta-dechlorination for anaerobic sludge and increase the treatability of 2, 4-DCP. The results of continuous anaerobic sludge-suspended carrier bioreactor (ASSCB) indicate that inoculation of the acclimated sludge by mixed mono-chlorphenols can degrade two mono-chlorphenols simultaneously, shorten the setup period, and increase the efficiency of degrading 2, 4-DCP. 2-CP was easily degraded with removal rate of over 80%. While the removal rate of 4-MCP was fluctuating within 30%-80% with changes of its influent concentration.

Original languageEnglish (US)
Pages (from-to)1252-1257
Number of pages6
JournalHuanjing Kexue/Environmental Science
Volume28
Issue number6
StatePublished - Jun 1 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)

Keywords

  • 2, 4-DCP
  • Anaerobic degradation
  • Chlorphenol
  • Dechlorination

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