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/m3.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 CO2 emissions by 738.25 kg,demonstrating significant carbon reduction benefits.
维普
万方数据
