Study On Electro-coagulation Flotation Technology In Oil-Wastewater Treatment

Oil-wastewater is a kind of wastewater which is liable to cause serious environmental pollution to the industry and our life, its source is wide and component is complex, oil-wastewater treatment is especially attended by people at home and abroad. Traditional technology: oil separation coagulation-flotation and bio-chemistry (Old Three Sets) no longer meets the requirement of outlet water quality and the sewage integration discharge standard with the development of production technology; so many people are engaging in exploring new technologies to treat oil-containing sewage. In this paper, aiming at oil-wastewater, the further studies on function mechanisms and dynamic models of electro-coagulation flotation have been made. Conclusions are as follows:1. Based on electro-chemistry, coagulation and flotation technology, the physical and chemical processes of electro-coagulation flotation technology in oil-wastewater treatment have been studied, and four typical function mechanisms, electrolysis coagulation, electrolysis flotation, electrolysis oxidation and electrolysis deoxidization, are given.2. Two critical processes in electro-coagulation flotation technology, electrolysis coagulation and electrolysis flotation, have been analyzed. Electrolysis coagulation dynamic models and electrolysis flotation dynamic models in oil-wastewater treatment have been established, and the influence factors of processes are also analyzed, which provide theoretic basis for optimizing the performance of electro-coagulation flotation technology.3. Some critical components of electro-coagulation flotation equipments, such as electro-coagulation-flotation reactor and electrode, have been introduced, their structure and material characteristics have been given, and an electro-coagulation flotation experiment equipment has been designed.4. Based on the common use of iron anode in electro-coagulation flotation, unit electrolysis voltage calculation model of iron anode has been constructed. For the major problem of the higher electricity energy consumption of electro-coagulation flotation equipments, the further analysis on some factors which influence electricity energy consumption has been made deeply and some reasonable measures have been put forward.