Experimental Study On Degradation Of Organic Wastewater By Fe-C Micro-electrolysis Method

In recent years,organic wastewater is widely involved many industries such as pharmacy,printing and dyeing,paper making,oil-bearing and so on.To a large extent,the pollutants in organic wastewater lead to the complex components,toxic and hazardous,many refractory substances and poor biodegradability.In view of the characteristics of organic wastewater,micro-electrolysis technology is a water treatment technology based on the combined effects of adsorption,redox reaction,electrochemistry,flocculation and precipitation,which can effective remove organic wastewater,and become one of the most important research directions for organic wastewater treatment.At present,the large amount of pharmaceutical waste water discharged and the characteristics of water quality are more and more representative in the difficult to handle organic waste water,and there are few researches.Therefore,it is necessary to effectively study the process of degrading pharmaceutical wastewater by micro-electrolysis technology.Pharmaceutical wastewater was used as the research object in this paper,the micro-electrolysis fillers were prepared by high temperature calcination,and the degradation of organic wastewater was analyzed by single factor analysis and orthogonal experiment.The experimental results show that the best micro-electrolysis fillers are prepared when the calcination temperature is 500?,Fe/C is 1:1,the content of bentonite is 20%,the content of ammonium bicarbonate is 4.5%,and the copper content is 4%.The micro-characteristics(XRD,SEM,EDS)characterization analysis found that the two kinds of micro-electrolysis fillers have a rough surface and a large void volume,and the material distribution in the reinforced micro-electrolysis filler is relatively uniform and there is no agglomeration phenomenon,which is favorable for the full contact between the organic wasterwater and the filler.The micro-characteristic characterization analysis shows that the apparent density and bulk density of the reinforced micro-electrolyte packing are larger than those of the iron-carbon micro-electrolyte packing,which indicates that the strengthened micro-electrolyte packing enhances the strength and hardness of the iron-carbon micro-electrolytic packing to a certain extent and reduces the reaction.reduces the loss of micro-electrolysis fillers during the reaction process.Two kinds of micro-electrolysis fillers were used to degrade tetracycline HCl in simulated organic wastewater.When initial pH=3,the dosage is 4g,the reaction time is 3h,the reaction conditions were the best.The degradation of organic wastewater by Fe/C micro-electrolysis packing can reach 72%.The enhanced micro-electrolysis technology has better treatment effect,which can reach 90.2%.Meanwhile the application range of PH is expanded,and the reaction in acidic,neutral and alkaline environment had better treatment effect.Dynamics study,all has the extremely good linear correlation between the fitting line,fitting similarity R~2 were higher than0.9,so the micro-electrolysis technology,tetracycline hydrochloride wastewater treatment process follows the first order reaction kinetics model.