Startup Strategy On Chloronitrobenznene Degardation In Microbial Electrolysis Cell

Chlorinated nitrobenzene is typical organic pollutants. Because the chlorinatednitrobenzene has mutagenicity, difficult biodegradability, and biological chemicals,many countries will nitrobenzene listed as priority pollutants. In conventional watertreatment processes, some common methods of economy and efficiency of matching.For example using anaerobic biological method to deal with the waste watercontaining chlorine generation of nitrobenzene, slow start, low processing efficiency,but this way. Therefore develops quickly effective chlorinated nitrobenzenewastewater treatment processes or pretreatment process to strengthen itsbiochemical very meaningful.This study developed a microbial electrysis cell, adopt domestication bacteriumresistance and two ways to start the direct inoculation of mixed bacteria microbialanaerobic electric auxiliary reactor, anaerobic microorganism electricity auxiliarydevice were examined for4-chlorinitrobenzene degradation effect. Found a way touse domestication bacterium can get good start effect. Domestication of anodeinoculant to resistance at the same time, the results show that the domestication hasbeen resistant to high concentrations of pollutants in the anode bacteria, the bacteriain1g/L of aniline atmosphere remained higher activity and electrochemical features.Continuous flow experiment laid the foundation for later research.4-chlorinitrobenzene in microbial anaerobic reduction of electric auxiliary deviceproduct mainly for the4-chlorinated aniline.4-chlorinitrobenzene proved thefeasibility of enhanced degradation occurred during biological cathode.Studied the pH, the total dosage of PBS buffer and electrode distance on44-chlorinitrobenzene degradation rule. When the cathode phase solution pH valueduring6~8, microbial anaerobic electric catalytic device for4-chlorinitrobenzenehas good degradation effect, and in the best in neutral environment. PBS phosphoricacid buffer solution concentration change influence on the performance of theanaerobic microorganism electricity auxiliary device is small, even if the waterreduced to20mM, the concentration of phosphate buffer solution system removalrate of30h of4-chlorinitrobenzene is still100%. When completely remove PBSphosphoric acid buffer solution, the cathode liquid due to internal obvious alkalinepH rise rapidly, inhibits the anodic microbial activity. And microbial activity loss ledto the fall off from the electrodes, increases the current density of the reactor. Whenthe electrode distance, respectively is1cm,3cm,6cm, electrode distance nearerthe degradation effect is better, in the30h when their degradation rate were100%, 95%and91%, respectively. The initial4-chlorinitrobenzene concentration of30mg/L, applied voltage0.5V, with a pH of7,20tendency for PBS bufferconcentration, HRT is24h operation one-piece microbial electric catalyticanaerobic reactor.