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Characteristics of Phenolic Wastewater Treatment using Moving Bed Biofilm Reactor in the MLE Process  

Kim, Moon Ho (서울시립대학교)
Oh, Sung Mo (서울시립대학교)
Bae, Yoon Sun (서울시립대학교)
Park, Chul Hwi (서울시립대학교)
Publication Information
Journal of Korean Society of Water and Wastewater / v.21, no.5, 2007 , pp. 521-529 More about this Journal
Abstract
Nutrient removal from synthetic wastewater was investigated using a MLE (Modified-Ludzack Ettinger) type MBBR (Moving Bed Biofilm Reactor), with different phenol ($C_6H_5OH$) concentrations, in order to determine the inhibition effects of phenol on biological nutrient removal and the biodegradation of phenolic wastewater. The wastewater was prepared by mixing a solution of molasses with known amounts of phenol and nutrients. The experiments were conducted in a lab-scale MLE type MBBR, operated with four different phenol concentrations (0, 67, 100 and 168mg/L) in the synthetic feed. Throughout the experiments, the ratio of the phenolic COD concentration to the total COD was varied from 0 to 1. Throughout batch test, the SNR (Specific Nitrification Rate) and SDNR (Specific Denitrification Rate) were significantly influenced by changes of the phenol concentration. Phenol was inhibitory to the nitrification/denitrification process, and showed greater inhibition with higher initial phenol concentrations. The SNR observed with 0, 67, 100 and 168mg phenol/L were very different like 10.12, 6.95, 1.51 and $0.35mg\;NH_{3^-}N/gMLVSS$ hr, respectively. Similarly, the SDNR observed at 0, 67, 100 and 168mg phenol/L were different like 0.322, 0.143, 0.049and 0.006mgN/gMLVSS day, respectively.
Keywords
Phenol; Moving bed biofilm; Nitrification; Denitrification; Inhibition; media;
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Times Cited By KSCI : 1  (Citation Analysis)
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