【作者】 吉剑；

【导师】 蒋京东；

【作者基本信息】 苏州科技学院 ， 环境工程， 2010， 硕士

【摘要】 目前采用富氧曝气法处理制药废水的研究还不多,富氧曝气法具有很多优点,本研究采用富氧曝气法处理制药废水中的一种废水,为该种废水处理的实际工程应用提供设计参考依据。本文综述了活性污泥法的发展及革新;制药废水的各种处理方法,分析各方法的优缺点。本文采用富氧曝气法处理阿维菌素废水并与空气曝气法作比较。主要研究内容及结果如下:(1)首先研究适合于处理阿维菌素废水的富氧气体浓度,主要研究的富氧气体浓度有四种35%、45%、55%、65%,研究表明富氧气体浓度大的曝气系统,其反应速率较快,并且随着废水浓度的增加,该种优势越明显。在处理中浓度废水时,富氧气体浓度大的系统,处理效果较好,并且随着废水浓度的增加,这种差距就越明显,但是并不是富氧气体浓度越高越好,55%与65%这两个系统的处理效果始终相差不大,在综合考虑耗氧量的前提下,建议采用55%的富氧气体浓度处理阿维菌素废水。(2)研究富氧曝气系统处理阿维菌素制药废水的最佳曝气时间为12h,最佳曝气量为80L/h。研究pH值、温度对富氧曝气系统的影响并与空气曝气系统作比较,结果表明富氧曝气系统的最佳pH值为6.0~7.5,最佳温度在25~35℃、在最佳条件下处理效果均优于空气曝气系统;研究曝气方式(间歇曝气或连续曝气)对富氧曝气系统处理效果的影响,结果表明采用间歇曝气的方式(每曝气2h,静置0.5h,整个过程为12h)可以达到与连续曝气相同的效果,而空气曝气系统则达不到连续曝气时的效果。富氧曝气系统在减少曝气量+机械搅拌的条件下,可以达到与最佳曝气量条件下相同的处理效果,而空气曝气系统加搅拌无明显效果。富氧曝气系统的抗负荷冲击(pH值冲击、容积负荷冲击)能力要强于空气曝气系统。(3)富氧曝气系统的污泥的吸附性能和沉降性能均优于空气曝气系统,且产生的剩余污泥量少于空气曝气系统,主要原因是氧气浓度高,可以给系统提供充足的氧气,通过驯化逐渐改变系统中的微生物的组成,这也是富氧曝气系统污泥量减少的原因。更多还原

【Abstract】 Currently, the research of Oxygen-enriched aeration to used to treatment the pharmaceutical wastewater is few. Oxygen-enriched aeration method has many advantages. To use the oxygen-enriched aeration method to treatment the pharmaceutical wastewater in this study, offer the the design reference for the practical engineering applications of this kind of wastewater. The paper reviewed the development of activated sludge and process of innovation, a variety of treatment methods for pharmaceutical wastewater, to analyze the advantages and disadvantages these methods. In this paper, use oxygen-enriched aeration to treatment the Avermectin wastewater and compared with the air aeration method. Main research contents and results are as follows:(1) First, to study the suitable concentration of oxygen gas for treatment of Abamectin wastewater. The oxygen-rich gas concentrations has four which is 35%, 45%, 55% and 65%. The studies show that the system of a large concentration of oxygen-rich gas, its reaction rate faster, and with the water concentration increases, the more obvious advantages of this type. In dealing with the concentration of wastewater, the systems of oxygen gas with large concentration, the treatment effect is better, and as the water concentration increases, this gap more obvious, but not the oxygen-rich gas concentrations as high as possible, 55% and 65% of the treatment effect of these two systems has always been more or less, in the comprehensive consideration under the premise of oxygen consumption, we recommend using 55% of the oxygen-rich gas concentrations in the wastewater treatment of Abamectin.(2)Study of oxygen-enriched aeration system to handle the avermectin pharmaceutical wastewater of the best aeration time is 12h, the best aeration capacity is 80L/h. Study of the pH, temperature on the impact of oxygen enrichment aeration system,and compare with the air aeration systems, the results show that the optimal pH in oxygen aeration system is 6.0 ~ 7.5, the best temperature is 25 ~ 35℃, in the best conditions, the treatment effect is superior to air aeration system; Research aeration mode (intermittent aeration or continuous aeration) on the oxygen aeration system of treatment effect, results show that the intermittent aeration method (2h per aeration , put it aside for 0.5h, the whole process for 12h) can achieve the same effect with continuous aeration and air aeration system can not reach the effect of continuous aeration. the conditions of Oxygen aeration system to reduce the amount of Aeration+ Mechanical agitation ,it can be achieved the same treatment effect with the best aeration conditions, but the system of air aeration system + Mechanical agitation had no significant effect. The anti-shock loading capacity (pH,volumetric loading) of Oxygen-enriched aeration system was stronger than the air aeration system.(3)The sludge adsorption and sedimentation performance of the Oxygen aeration system is better than the air aeration system, and the sludge generated is less than air aeration system, mainly due to high concentrations of oxygen and can provide sufficient oxygen to the system, The composition of microbes gradually changed through by the domestication in the system, which is the mechanism of the amount of oxygen-rich sludge aeration system to reduce.更多还原