摘要
采用电化学氧化工艺处理某制药厂高氨氮废水,考察了初始pH、电解质浓度、电流密度、极板间距对废水处理效果的影响。在弱碱条件下,增加电解质浓度、提升电流密度和减小极板间距等措施有利于降解性能的提升。基于废水处理效果及能耗综合考虑,确定了最佳的操作条件:初始pH值为8.0,电解质质量浓度为6.0 g/L,电流密度为20 mA/cm^(2),极板间距为1 cm,电解时间为3.0 h。在此条件下,废水氨氮、化学需氧量的去除效率分别为84.76%、45.93%,运行能耗为69.12 kW·h/m^(3),运行电费为55.30元/m^(3)。通过该方法处理高氨氮制药废水,可在降低废水氨氮的同时,实现废水中大量有机物的去除,具有较好的环境效益和社会效益。
The high ammonia nitrogen wastewater from a pharmaceutical factory was treated via the electrochemical oxidation process.The effects of initial pH,electrolyte mass concentration,current density,and electrode spacing on the wastewater treatment effect were investigated.Under weak alkaline conditions,measures such as increasing the electrolyte concentration,increasing the current density and reducing the distance between the plates were beneficial to improve the degradation performance.Considering the effect of wastewater treatment and energy consumption,the optimal operating conditions were determined:the initial pH value was 8.0,the electrolyte mass concentration was 6.0 g/L,the current density was 20 mA/cm^(2),the electrode spacing was 1 cm,and the electrolysis time was 3.0 h.Under these conditions,the removal efficiencies of ammonia nitrogen and chemical oxygen demand in wastewater were 84.76% and 45.93%,respectively,the operating energy consumption was 69.12 kW·h/m^(3),and the operating electricity cost was 55.30 yuan/m^(3).The method for treating high ammonia nitrogen pharmaceutical wastewater can reduce the ammonia nitrogen and at the same time realize the removal of a large amount of organic matter,which has good environmental and social benefits.
作者
侯鹏飞
陈晓飞
祁浩杰
闫志斌
雷诣涵
邢佳枫
HOU Pengfei;CHEN Xiaofei;QI Haojie;YAN Zhibin;LEI Yihan;XING Jiafeng(Chenping Laboratory,Tianjushi Engineering Technology Group Co.,Ltd.,Shijiazhuang 050000,China)
出处
《净水技术》
CAS
2023年第1期115-121,共7页
Water Purification Technology
关键词
电化学氧化
高氨氮
制药废水
影响因素
能耗分析
electrochemical oxidation
high ammonia nitrogen
pharmaceutical wastewater
influencing factors
energy consumption analysis
