【作者】 王超洋；

【导师】 关卫省；

【作者基本信息】 长安大学 ， 环境工程， 2008， 硕士

【摘要】 进入水体的石油烃类污染物会对水生生物、周边环境及自然景观产生严重的影响。对于浓度较低的含油废水,特别是受烃污染的地表水的处理逐渐成为人们关注的热点,虽然其石油烃的含量小,但危害却非常深远。本文就针对受石油烃污染的河流水质状况,提出了针对石油烃污染的深度处理处理方法。本试验所研究的水质因子有三种,分别是油、COD和氨氮。废水先用臭氧进行预氧化。先通过静态试验,研究分析了在不同臭氧投加量和不同臭氧接触时间下臭氧预氧化对水中污染物的去除效果,最后确定臭氧的最佳投加量为8mg/L,接触时间为10min。曝气生物滤池采用高比表面、高吸附性和离子交换性能的斜发沸石作为滤料,试验介绍了生物沸石的挂膜启动情况,重点研究了不同运行条件下对含油废水处理效果和耐污染物冲击负荷性能的影响,确定了该曝气生物沸石工艺的最佳运行工况为:PH=6.5～7.5,温度20～250C,水力负荷为1.1205m/h,水力停留时间为1.766h,曝气量为30ml/min,气水比为10:1。生物滤池在此工况下运行既能得到较好的污染物去除效果,又能节省运行费用。将臭氧氧化装置与曝气生物滤池装置串联,在已确定的臭氧和生物沸石最佳工况下运行,进水水质状况为COD:35mg/L左右;氨氮:2.0mg/L左右;油:3.0mg/L左右。出水中油含量稳定在0.15mg/L左右,出水COD稳定在11mg/L左右,氨氮的去除率接近100%。废水经过处理后,COD和氨氮达到了地表水Ⅰ类水环境标准,油达到了地表水Ⅲ类以上水环境质量标准。臭氧—曝气生物沸石工艺对含油废水的深度处理在技术上是可行的。更多还原

【Abstract】 The pollutants of petroleum hydrocarbons into water had a great impact on aquatic organisms, the surrounding environment and natural landscape. For low concentration of oily wastewater, especially for the surface water polluted by petroleum hydrocarbons, the treatment process has caused a great concern. Although the content of petroleum hydrocarbons in water was small, the hardness was serious. The depth treatment of river polluted by petroleum hydrocarbons was introduced in this paper.The index of water quality in this study included three factors: content of oil, chemical oxygen demand(COD) and ammonia nitrogen. In this paper, the removal efficiency of ozone pre-oxidation under different ozone dosage and different contact time was researched through static test. And the results determined was that the best ozone dosage of 8mg/L, the contact time of 10min.The zeolite with advantages of high surface area, high adsorption and ion change properties was used as filter media in biological aerated zeolite. In this experiment, the start of biological membrance was introduced in biological aerated zeolite, and the impact of operating condition on the effect of oily wastewater treatment and the performance of enduring fluctuation of pollution was researched. The best operating condition of biological aerated filter process was also determined. And the conditions contained pH = 6.5 ~ 7.5, the temperature of 20 ~ 250C, the hydraulic load of 1.1205m/h, the hydraulic retented time(HRT) of 1.766h, the aeration capacity of 30ml/minand the gas-water ratio be 10:1. The biofilter under this condition had a high removal efficiency of pollutants and low operating cost.The effluent quality was improved using the process of ozonation and biological aerated zeolite in series at the best running condition. Condition of enter water:COD:35mg/L; ammonia nitrogen:2.0mg/L; oil:3.0mg/L.The content of oil in effluent was stabilized at 0.15mg/L, and COD at 11mg/L around. And the removal of ammonia nitrogen was close to 100%. COD and ammonia nitrogen of effluent reached to the classⅠof surface water environmental standard water, and content of oil to the classⅣ. The process of ozonation-biological aerated zeolite of oily wastewater treatment is feasible in technic.更多还原