Study On Bio-Electro Reactor For Simultaneous Denitrification And High Concentrations Phenol Degradation

Phenol and nitrate are two major pollutants simultaneously occurring in severalindustrial wastewaters. By combining microbial treatment and electrode biofilmreactor, we developed a novel bio-electro reactor (BER) with high efficiency and lowrunning cost for the simultaneous removal of phenol and nitrate.In the experiment, anaerobic sludge has been developed in a sequencing batchreactor (SBR) for 146 days by increasing concentrations of influent Phenol and nitratein step, and dominant culture is abtained; Four factor affected degradation processcontain C/N, concentrations of influent Phenol and nitrate, concentrations of NO₂^--Nand temperature is studied, and it has been revealed that simultaneous denitrificationand Phenol degradation is feasible and has champion result in a sequencing batchreactor (SBR).Three identical operating conditions include micro electric reactor, microbioreactor and micro electric-bioreactor in the study of microbe breed on theelectrode. It has been revealed that T=20℃, pH=7.0, current strength at the range0-55mA can't depredated the Phenol; micro electric reactor and microelectric-bioreactor have their own merit, the degradation efficiency of microelectric-bioreactor higher than micro electric reactor, the microbe breed on theelectrode in the bioreactor are more speed than in the micro electric reactor, but thebiofilm in the micro bioreactor can't used for long time, several weeks abscessed fromthe electrode, the film in the micro electric-bioreactor are very tightness, breed timevery long but once formed may used for long time.The operation of BER showed that BER had great advantage at degradationefficiency. However, the removal C/N in our experiment is higher, which is oppositeto the conventional theory. The elucidation of the mechanism needs further works.