改性活性炭电极用于电厂生活污水后脱氮及减碳的研究  

Study on the Application of Modified Activated Carbon Electrode to Nitrogen Removal and Carbon Reduction of Domestic Wastewater in Power Plant

作　　者：杨畅畅 于海琴[1] 冯瑞琦 韩溪童 孙贺 范思辰 YANG Changchang;YU Haiqin;FENG Ruiqi;HAN Xitong;SUN He;FAN Sichen(Department of environment,Beijing Jiaotong University;Department of Computer and Information Technology,Beijing Jiaotong University:Beijing 100044,China)

机构地区：[1]北京交通大学环境学院,北京100044 [2]北京交通大学计算机与信息技术学院,北京100044

出　　处：《水处理技术》2025年第1期97-101,119,共6页Technology of Water Treatment

摘　　要：受传统氨氮处理工艺限制,电厂生活污水常出现氨氮难达标问题,从而需要投入大量外加碳源,这一过程会造成碳排放和处理成本的增加。本研究使用NaOH改性活性炭电极,应用在传统生活污水生物处理(AAO)之后进一步去除氨氮(后脱氮),此过程中不添加任何外加碳源、除磷药剂以及深度脱氮工艺。实验结果表明,在最优操作条件:电压1.2 V、进水流量37 mL/min、初始氨氮质量浓度6.138 mg/L下,改性后氨氮去除率达到64.31%;TN、TP、电导率去除率达到45.38%、62.08%和89.38%;CDI的加入使得传统生物处理过程无需外加碳源和除磷药剂即可达到出水标准,成本下降了0.4元/m^(3),出水作为电厂回用水可节省2 000元取水费用;对吸附过程进行碳排放核算,在电厂生活污水日处理量为450 m3/d的情况下,CDI装置的加入平均每天可以减少738.25 kgCO_(2)的排放,具有良好的减碳效益。此外,该技术可推广应用于居民小区等建筑做回用水,每天可节省256元污水处理费用,并且具有同样的碳减排效益。Due to limitations in the conventional ammonia nitrogen treatment process,domestic sewage from power plants often fails to meet the required ammonia nitrogen standards,necessitating the addition of significant quantities of external carbon sources.This,in turn,increases carbon emissions and treatment costs.In this study,a NaOH-modified activated carbon electrode was employed for post-denitrification,following the traditional biological treatment of domestic sewage(AAO),without the need for additional carbon sources,phosphorus removal agents,or deep denitrification processes.Experimental results indicated that under optimal operating conditions—voltage of 1.2V,influent flow rate of 37 mL/min,and initial ammonia nitrogen concentration of 6.138 mg/L,the ammonia nitrogen removal efficiency reached 64.31%.Furthermore,removal rates for total nitrogen(TN),total phosphorus(TP),and conductivity were 45.38%,62.08%,and 89.38%,respectively.The addition of capacitive deionization(CDI)technology enabled the traditional biological treatment process to achieve effluent standards without requiring supplementary carbon sources or phosphorus removal agents,reducing costs by 0.4 yuan/m^(3).Carbon emission calculations for the adsorption process showed that for a power plant with a daily domestic sewage treatment capacity of 450 m³/d,the use of the CDI system could reduce average daily CO_(2) emissions by 738.25 kg,demonstrating significant carbon reduction benefits.

关 键 词：生活污水 CDI 后脱氮 电吸附 碳减排 

分 类 号：X773[环境科学与工程—环境工程]