摘要
Bio-electrochemical system( BES) was used to soften hard water,and effects of ion species,electrode area and influent concentration on the performance of BES to soften hard water were analyzed. The results showed that it was more easy to remove Mg^(2+) from the hard water than Ca^(2+). Increasing electrode area could enhance the performance of BES to soften hard water. When the amount of added graphite at the anode was 150 g,the removal efficiency of Ca^(2+) increased by 18. 1%. The increase of influent concentration at the anode and the cathode could improve the softening efficiency of hard water by BES. As COD concentration at the anode and NO_3^--N concentration at the cathode increased to 2000 and 300 mg/L,the removal efficiency of Ca^(2+) rose by 36. 1% and 9. 4% respectively.
Bio-electrochemical system( BES) was used to soften hard water,and effects of ion species,electrode area and influent concentration on the performance of BES to soften hard water were analyzed. The results showed that it was more easy to remove Mg^(2+) from the hard water than Ca^(2+). Increasing electrode area could enhance the performance of BES to soften hard water. When the amount of added graphite at the anode was 150 g,the removal efficiency of Ca^(2+) increased by 18. 1%. The increase of influent concentration at the anode and the cathode could improve the softening efficiency of hard water by BES. As COD concentration at the anode and NO_3^--N concentration at the cathode increased to 2000 and 300 mg/L,the removal efficiency of Ca^(2+) rose by 36. 1% and 9. 4% respectively.
基金
Supported by National Undergraduate Training Programs for Innovation and Entrepreneurship(201610449064)
A Project of Shandong Province Higher Educational Science and Technology Program(J16LD03)
Doctoral Scientific Research Foundation of Binzhou University(2014Y17)
Natural Science Foundation of Shandong Province(ZR2014EEP009)
