Study On 4-amino-dimethyl-aniline Hydrochloride Degraded By Electrochemical Oxidation And Bio-electro Reactor

With each second that passes a water crisis takes another step closer to reality. Water is one of the abundantly available resources in nature and is essential for animal and plant life. Pollution of water bodies is increasing steadily due to industrial proliferation and urbanization. Nowadays, the worldwide production and use of chemical compounds have increased tremendously which find their way into the environment and many of these compounds are biologically non-degradable. Therefore, the major concern is to treat the wastewater before it is discharged into the environment.4-amino-dimethyl-aniline hydrochloride is one of the main components of the wastewater from vanillin production plant. So it is used for the target contamination to be degraded by microorganism, electro-chemical oxidation and Bio-electro reactor in this paper to find out a economical, efficient and non-polluted methode for the treatment of weastwater from vanillin production plant.phenolic compounds is among the most prevalent form of chemical pollutants in the industrial wastewater. 4-Amino-dimethyl-aniline hydrochloride belonging to this family is one of the main components of the wastewater from Vanillin production workshops. It inhibits the normal of microbial population, thereby affecting biological treatment process. The common treatment processes of the wastewater of Vanillin are difficulty and the technologies of treatment available for the contaminations from industrial wastewater are biological, physical and chemical processes. Several researchers have investigated the use of anaerobic biological processes for the removal of phenolics. However, biological processes cannot treat high concentration of phenolics associated with industrial wastewater. Blum et al. reported that high phenol concentration showed 50% initial-rate inhibition with different seed cultures and substrates. The inhibition potential of phenol itself and the presence of other organic and inorganic inhibitors are a major drawback of the process. It is also proved by the previous researchers that simplex physical and chemical processes have no obvious effects on the degradation of phenolics. At the mine time, recent research indicated that electrochemical process which associates chemical with physical progress in the water treatment such as electro–float and electro–deposition is able to degrade the phenolic compounds effectively.The electrochemical oxidation processes have attracted a great deal of attention because of their versatility, which makes the treatment of liquids, gases and solids possible, environmental compatibility, and especially, destruction of toxic and non-biodegradable organics by direct or indirect anodic oxidation. In fact, the needed for electrochemical technology here is electron, which is a clean reagent and therefore there is no others needed for adding. In recent years, it is much more cried for electrochemical methods that have been successfully applied in the purification of landfill leachate, tannery wastes, oil refinery wastewaters, textile wastes, etc. Therefore, electrochemical method is employed in this study.In direct anodic oxidation, the pollutants are first absorbed on the anode surface and then destroyed by anodic electron transfer reaction. In indirect anodic oxidation process, strong oxidants such as hypochlorite/chlorine, ozone, Fenton reagent are electrochemically generated. The pollutants are then destroyed in the bulk solution by oxidation reaction of the generated oxidant. All the oxidants are generated in situ and are utilized immediately. A lot of chloride contained in the vanillin wastewater, so there is an actual significance in the study on the degradation of 4-amino-dimethyl-aniline hydrochloride by an indirect electrochemical oxidation process.In this paper, the degradation of 4-Amino-dimethyl-aniline hydrochloride containing wastewater generated from Vanillin production at a constant current density in an undivided reactor was studied by electrochemical oxidation and Bio-electro Reactor. During the various stages of electrolysis, parameters such as the concentration of COD and TOC were determined in order to know the feasibility of electrochemical treatment. Energy consumption and current efficiency during the electrolysis were calculated. the kinetics during the indirect electrochemical oxidation of the compound was analyzed. It is known from the literature before that the initial pH does not have significant effect on the degradation of organic pollutants by indirect electrochemical oxidation in the range of 3.0~10.0 by the Ti/Ru-Ti-Sn anode. Thus, the affect of pH is not considered in this study. The study showed the result of the sample which contains COD 143.00 mg·L-1 and TOC 38.04 mg·L-1 degraded after electrolysis times of 5 hours , in the condition of current density of 30 mA·cm-2 , with initial hydrochloride of 100 mg·L-1 or no hydrochloride. It indicates that it is available to the degradation of 4-amino-dimethyl-aniline hydrochloride by an indirect electrochemical oxidation process. Treatment efficiency in terms of COD removal was notably high in the chloride added. The COD removal was 74.13%, otherwise, it was only 22.38% in the condition of no chloride.It was revealed in Bio-electro Reactor that the electrochemical oxidation degradation of 4-Amino-dimethyl-aniline hydrochloride is mainly the process of indirect electrochemical oxidation by the active chloro species in the given system containing chloride.The generation regular of the active chloro species had most relation with the removal efficiency of organic pollutants. Because of the active chloro species come from the chloride in the wastewater, the chlorinated organic compounds was generated in the indirect electrochemical oxidation. Although it can not be ignored for the second pollution problem of the chlorinated organic compounds in the treatment of organic pollutants, such stable compounds would be degraded with the longer electrolysis time. For this study, another 1.0 hour was needed for containing TOC of 0 mg/L. Hence, it is feasible for wastewater from vanillin production to be treated by indirect electrochemical oxidation.The results degraded by Bio-electro Reactor indicated that there are a lot of special microbes and bactieria eating 4-amino-dimethyl-aniline hydrochloride in the activated sludge after 20 days'incubation, at the same time a stable bio-filmed electrode was formed. On the condition of 25±1℃, pH6.3~7.3, used Bio-electro reactor not only increased the biodegradability and decreased the electrical energy consumption but also solved the problem which maybe bring by the electrochemical method , that is the second pollution of organic compounds containing chlorine in the process of indirect electrochemical degradation on the organic pollutants.