Effect of a static magnetic field on formaldehyde biodegradation in wastewater by activated sludge
Maria Łebkowska , Anna Rutkowska-Narożniak , Elżbieta Pajor , Zbigniew Pochanke
AbstractThe aim of this study was to determine the impact of a static magnetic field (MF) of 7 mT on formaldehyde (FA) biodegradation by activated sludge in synthetic wastewater. The MF had a positive effect on activated sludge biomass growth and dehydrogenase activity. The influence of the MF on the degradation process was observed with a FA concentration of 2400–2880 mg/l. Decreases in FA concentration and chemical oxygen demand (COD) were greater, by 30\% and 26\% respectively, than those in the control sample. At initial FA concentrations in raw wastewater of 2400 and 2880 mg/l, a decrease in the wastewater biodegradation efficiency was observed. This resulted in an increase of the ecotoxicity of the effluent to Daphnia magna. The value of the sludge biotic index (SBI) was dependent on the FA concentration in raw wastewater and the induction of the MF.
|Journal series||Bioresource Technology, ISSN 0960-8524, (A 45 pkt)|
|Keywords in English||Biodegradation, Formaldehyde, Static magnetic field|
|ASJC Classification||; ; ; ;|
|Publication indicators||= 53; = 46; : 2011 = 2.516; : 2011 = 4.98 (2) - 2011=5.352 (5)|
|Citation count*||28 (2015-09-11)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.