Aerobic biodegradation of dinitrophenols and their mixture in continuous operations by an immobilized mixed microbial community

作者：Karlova Pavlina^*; Halecky Martin; Paca Jan; Stiborova Marie; Kozliak Evguenii I

来源：Clean Technologies and Environmental Policy, 2015, 17(1): 287-291.

DOI：10.1007/s10098-014-0772-1

• Dinitrophenols
• Packed-bed reactor
• Aerobic biodegradation
• Wastewater treatment

Aerobic biodegradation of 2,4-dinitrophenol (2,4-DNP) and 2,6-DNP by an immobilized mixed microbial community in packed-bed reactors was compared for individual components and in a mixture. The reactors efficiently (> 97 %) removed higher 2,4-DNP concentrations (up to 43 g m(-3)) compared to 2,6-DNP (< 80 % only, even when below 5 g m(-3)), the former being metabolized with higher degradation rates. Similar loadings of both DNPs were efficiently degraded (> 95 %) when treated as a mixture; i.e., the 2,6-DNP removal efficiency was positively affected by the presence of 2,4-DNP when low concentrations of both pollutants were treated. However, an increase of the total DNP concentration to 41 g m(-3) led to a sizable drop of the degradation rate in the mixture but not when the substrates were treated separately.

• 出版日期2015-1