活性炭吸附工艺在纺织印染废水深度处理的工业化应用

发布时间：2018-03-14 03:54

本文选题：纺织印染废水　切入点：活性炭吸附　出处：《郑州大学》2017年硕士论文　论文类型：学位论文

【摘要】：我国经济近年来高速发展,已经发展成为纺织工业大国,纺织工业蓬勃发展的同时也带来废水排放总量的爆发性增长,造成生态环境逐渐恶化,水污染日趋严重和水资源短缺加剧。我国污染物排放标准日益严格,传统纺织印染废水处理工艺已很难达到较严格的排放或回用要求。因此,纺织印染废水的深度处理越来越体现出其重要性。本论文以活性炭滤池吸附工艺为基础,研究了煤质颗粒活性炭对纺织印染废水生化出水COD的吸附容量、吸附速率等特性,为高密市第二污水处理厂提标改造项目工艺设计提供必要的设计依据。同时结合项目的调试与试运行,通过对吸附滤池反洗控制参数(如反洗时间、反洗气量、气压、对出水水质的影响等)的研究,为污水厂吸附滤池的运行提供可靠的运行条件,优化运行参数,降低成本。主要结论如下:(1)静态试验表明,煤质颗粒活性炭对纺织印染废水生化出水的COD有良好的吸附作用,其吸附容量为152.9mg/g,活性炭吸附时间为20-60min时,具有较高的处理效率。穿透实验表明,出水COD值大于50mg/L时,炭柱累计处理水量7.5L,累计运行时间约为41.7天,吸附容量利用率为79.7%;(2)工程试运行表明,活性炭吸附滤池对于纺织印染废水生化出水中可溶性难降解有机物、悬浮物具有良好的吸附和过滤作用。通过反洗实验,优化了滤池的反洗运行参数,确定反洗参数为:反洗阶段的前10min,反洗气量设为4m3/h,之后到反洗结束,反洗气量设为5.5-6m3/h,反洗持续时间为4h。依照吸附单元进水堰门水头高度设定反洗周期,水头抬升300mm时,启动反洗程序。(3)本工程吨水运行成本0.36元,具有一定的推广前景。
[Abstract]:China's economy has developed rapidly in recent years and has developed into a large country in textile industry. The booming development of textile industry has also brought about an explosive increase in the total amount of wastewater discharge, which has resulted in a gradual deterioration of the ecological environment. The pollution of water is becoming more serious and the shortage of water resources is worsening. The discharge standard of pollutants is becoming more and more strict in our country. It is very difficult for traditional textile printing and dyeing wastewater treatment process to meet the strict requirements of discharge or reuse. The advanced treatment of textile printing and dyeing wastewater is more and more important. Based on the adsorption technology of activated carbon filter, the adsorption capacity and adsorption rate of coal granular activated carbon on COD of textile dyeing wastewater are studied. This paper provides the necessary design basis for the technological design of the upgrading project of the second wastewater treatment plant in Gaomi city. At the same time, combined with the commissioning and trial operation of the project, the backwash control parameters of the adsorption filter (such as backwash time, backwash gas volume, air pressure) are obtained. The study on the influence of effluent quality, etc., provides reliable operating conditions for the operation of adsorption filter in wastewater treatment plant, optimizes the operation parameters and reduces the cost. The main conclusions are as follows: 1) static test shows that, Coal granular activated carbon has a good adsorption effect on COD of biochemical effluent from textile printing and dyeing wastewater. When the adsorption capacity is 152.9 mg / g and the adsorption time of activated carbon is 20-60 min, the treatment efficiency is higher. The penetration experiment shows that when the COD value of effluent is more than 50 mg / L, the adsorption capacity is 152.9 mg / g and the adsorption time of activated carbon is 20-60 min. The results showed that the activated carbon adsorption filter could not degrade the soluble organic matter in the biochemical effluent of textile printing and dyeing wastewater, and the accumulative operating time was about 41.7 days, and the utilization ratio of adsorption capacity was 79.7%. The suspended solids have good adsorption and filtration function. Through the backwash experiment, the operation parameters of the backwash are optimized. The backwash parameters are determined as follows: the first 10 minutes of the backwash stage, the amount of the backwash gas is set to 4 m3 / h, and then to the end of the backwash, The backwash gas volume is 5.5-6m3 / h and the backwash duration is 4h.According to the water head height of the inlet Weir gate of the adsorption unit, the backwash period is set up and the backwash procedure is started when the water head is raised by 300mm.) the operation cost of this project is 0.36 yuan per ton of water, which has a certain popularizing prospect.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X791

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