电化学技术对分散式生活污水回用处理研究

发布时间：2018-03-19 06:50

  本文选题：电化学　切入点：COD　出处：《大连海事大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着经济的发展与人们生活水平的不断提高,人们对水资源的需求与排放量也逐渐增大,对水体的污染也越来越严重。分散式生活污水有效处理回用,不仅可以有效解决排放污染问题,而且可以解决部分用水问题,具有良好的开发前景。目前,中水处理技术尚未成熟,而现有的污水处理技术又难以达到污水资源化的要求。因此,本文针对分散式生活污水的排放特点,主要采用以环境友好型技术著称的电化学法方法进行处理,目的是利用该技术简化传统污水处理工艺,并达到快速便捷处理以满足回用的目的。本文主要以污水中的有机物、氮和磷的降解或去除为重点目标,根据电化学水处理的特点及反应机理,探究电化学处理过程的影响规律与最佳反应条件。研究表明,电化学对污水具有较好的处理效果,可以实现分散式污水回用处理的目的。电化学处理对磷的处理效果非常高,电解时间与电压对总磷均有影响,随着电解时间的延长,TP的去除量增加,当电压为5V时,在30min内完成对磷的全部去除。该工艺对水体中COD具有较好的去除效果。其中,阴极材料、电极间距、电压、氯离子以及添加剂Fe3O4对COD的去除效果均有影响。极板间距的缩进有利于COD的去除。适量氯离子可促进污染物的降解,提高COD的去除率。Fe3O4的添加有助于促进COD的去除。当Fe3O4的投加量为80mg/L时,作用时间为30min,COD的去除率可达70%,满足回用的目的要求。电化学对氨氮的去除效果有限,氯离子的添加可促进氨氮的去除。实验结果表明,当电压为8V,间距为15mm,Fe3O4和电解质NaCl投加量分别为50mg/L和5000mg/L,处理后的城镇生活污水可满足生活杂用水回用要求。
[Abstract]:With the development of economy and the improvement of people's living standard, the demand and discharge of water resources are increasing, and the pollution of water is becoming more and more serious. It can not only effectively solve the problem of discharge pollution, but also solve part of the problem of water use, which has a good prospect of development. At present, the technology of reclaimed water treatment is not mature. However, the existing sewage treatment technology is difficult to meet the requirements of wastewater reuse. Therefore, according to the characteristics of decentralized domestic sewage discharge, this paper mainly adopts the electrochemical method, which is famous for environment-friendly technology. The purpose of this paper is to simplify the traditional wastewater treatment process and to achieve rapid and convenient treatment to meet the purpose of reuse. This paper focuses on the degradation or removal of organic matter, nitrogen and phosphorus in sewage. According to the characteristics and reaction mechanism of electrochemical water treatment, the influence law and optimum reaction conditions of electrochemical treatment process were studied. The effect of electrochemical treatment on phosphorus treatment is very high. The electrolysis time and voltage have an effect on total phosphorus. With the increase of electrolytic time, the removal of TP increases, when the voltage is 5 V, All phosphorus removal was completed in 30 minutes. The process has a good removal effect on COD in water. Among them, cathode material, electrode spacing, voltage, Chlorine ions and additive Fe3O4 have an effect on the removal of COD. The reduction of plate spacing is beneficial to the removal of COD, and the proper amount of chloride ions can promote the degradation of pollutants. When the dosage of Fe3O4 is 80 mg / L, the removal rate of COD in 30 mins can reach 70%, which can meet the requirements of reuse. The electrochemical removal effect of ammonia nitrogen is limited, and the effect of electrochemistry on the removal of ammonia nitrogen is limited when the dosage of Fe3O4 is 80 mg / L, and the removal rate of COD can be increased by increasing the removal rate of Fe3O4.When the dosage of Fe3O4 is 80 mg / L. The experimental results show that when the voltage is 8V, the spacing is 15mm NaCl and the dosage of electrolyte NaCl is 50mg / L and 5000mg / L respectively, the treated municipal domestic sewage can meet the requirements of domestic miscellaneous water reuse.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X799.3

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