Potential impact of methyl isobutyl ketone (MIBK) on phenols degradation in an UASB reactor and its degradation properties.
Methyl isobutyl ketone (MIBK) as a solvent is extensively used for the phenols extraction from the wastewater, so it is unavoidable to expose in the effluent due to the solubility and leakage problem. The present study evaluated the impact of MIBK on phenols degradation in an UASB reactor and analyzed its degradation properties. The results indicated that the continuous dosing (0.1gL-1) and impact (10gL-1) of MIBK had limited effect on phenols removal (1-2% reduction) in the UASB reactor, but the specific methanogenic activity (SMA) values of sludge decreased by 45-75% after MIBK exposure. Anaerobic degradation rate of MIBK fitted well to a pseudo-first-order kinetic equation with respect to the initial concentration of 35mgL-1(k=0.0115h-1, R2=0.9664). Furthermore, the relative methane generation rate constants of MIBK were 0.00816, 0.00613, 0.00273, and 0.00207d-1at the initial concentrations of 0.1, 0.5, 5, and 10gL-1, respectively. MIBK showed higher inhibitory effect on the methanogenesis than on phenols degradation. This study pointed out that the industrial installations should consider the influence of solvent on anaerobic treatment of phenolic wastewater.
Department of Municipal Engineering, School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China. Electronic address: wang_wei@hfut.edu.cn.
Wei
W
Wang
Department of Municipal Engineering, School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China.
Kai
K
Yang
Section Sanitary Engineering, Department of Water Management, Delft University of Technology, Delft 2828CN, The Netherlands.
Julian Muñoz
JM
Sierra
Section Sanitary Engineering, Department of Water Management, Delft University of Technology, Delft 2828CN, The Netherlands.
Xuedong
X
Zhang
Department of Municipal Engineering, School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China.
Shoujun
S
Yuan
Department of Municipal Engineering, School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China. Electronic address: zhhu@hfut.edu.cn.
Zhenhu
Z
Hu
D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D019149:Bioreactors; D007700:Kinetics; D008697:Methane / Q000378:metabolism; D008742:Methyl n-Butyl Ketone / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry; D010636:Phenols / Q000378:metabolism*; D012722:Sewage; D012997:Solvents / Q000737:chemistry; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000378:metabolism*
D008697:Methane; D008742:Methyl n-Butyl Ketone; D010100:Oxygen; D010636:Phenols; D012722:Sewage; D012997:Solvents; D062065:Wastewater; D014874:Water Pollutants, Chemical; C005458:methyl isobutyl ketone
Methyl isobutyl ketone; Phenolic compounds; Solvent; Specific methanogenic activity; UASB