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Large amount of wastewater generated by the refining industry, complex composition, are more difficult to govern organic wastewater, especially an alkali waste water. Wherein the mass fraction of the base is usually 5% to 10%, a pH above 11, containing a high concentration of substances such as phenol, sulfides, mercaptans, naphthenate, stench, pollution is extremely serious, the COD is often up to 5000mg / L, above, caused by the impact of the subsequent biochemical systems, thus affecting the normal operation of the wastewater treatment system, affecting the final effluent quality. Many domestic refineries are trying to solve this problem. In this paper, photochemical oxidation technology refinery basic wastewater degradation experimental study to explore the feasibility of this technology degradation of high concentration organic wastewater. Of this experimental research work includes: (1) by measuring various types of pollution indicators in wastewater before and after treatment: COD, Oil, the Ar-OH.S2-NH3-N, BOD, compared UV/O3, UV / air and UV / TiO2/H2O2 process governance effect; (2) to inspect various operating factors, such as: UV, O3, H2O2, TiO2 concentration, measurement, response time to deal with the effect of; (3) to explore UV/O3 improve the biodegradability of wastewater; (4) to study the law of the photochemical oxidation degradation of refinery basic wastewater to determine the optimum conditions of pretreatment requirements. Experimental technology used routes are: 1. Designed practical, easy industrial application of the reactor; 2 the O3/UV, air / UV, air -O3/UV, TiO2/UV/H2O2 wastewater treatment process experiments, comparative various forms of treatment effect, changing the reaction conditions, screening the best conditions, to determine the most appropriate pretreatment. Through the experimental studies, the following conclusions: (1) air -O3/UV way is the optimum combination of basic wastewater pretreatment; (2) O3 concentration and contact time is the key factor to affect the degradation effect, 0.1A concentration of 03 conditions, first aeration 0.5h, inter the S2-after the first dosage 1.5hO3/UV, COD, Oil, Ar-OH, S2-average degradation rate were: 43.3%, 46.3%, 74.5 %, 96.7%, reaching pretreatment requirements; (the) by UV/O3 law to deal with effluent BOD / COD value increased to an average of 0.45, to improve the biodegradability of wastewater. On the basis of the above study, UV/O3 process oxidation refinery basic wastewater proposed a kinetic model, and prove that the kinetic model can reflect the actual. The experimental results show that the photochemical oxidation technology can fully meet the governance requirements, and has the following advantages: completely ambient temperature and pressure reactions, degradation of pollutants, the treatment effect is easy to control, in addition to color, deodorant. Compared with other technologies, reaction process does not produce sludge, without sludge treatment, so save the investment, and the equipment is simple, small footprint, is one of the best governance wastewater. The results of this research are the basis for the development of a new refinery wastewater treatment technology, is now reporting the Guangdong Provincial Science and Technology Program topics, and laid the foundation for further industrial small scale experiments.
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