| 3DBER-S-Fe同步脱氮除磷及去除邻苯二甲酸酯的工艺特性 |
| 摘要点击 3096 全文点击 1074 投稿时间：2016-04-09 修订日期：2016-05-28 |
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| 中文关键词 再生水 三维电极生物膜 水力停留时间 邻苯二甲酸酯 脱氮除磷 |
| 英文关键词 reclaimed water three-dimensional biofilm-electrode hydraulic retention time phthalate esters (PAEs) nitrogen and phosphorus removal |
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| 中文摘要 |
| 为探究三维电极生物膜耦合硫铁新工艺（3DBER-S-Fe）脱氮除磷并同步去除邻苯二甲酸酯（PAEs）的工艺特性，在水力停留时间（HRT）分别为8、6、4 h条件下，研究分析了系统内总氮（TN）、总磷（TP）、邻苯二甲酸二丁酯（DBP）、邻苯二甲酸二（2-乙基）己酯（DEHP）、NO3--N、SO42-及pH的变化情况.结果表明，3DBER-S-Fe系统具有较好的脱氮除磷及PAEs去除效果.当水力停留时间为8、6、4 h时，TN去除率分别为80.99%、78.85%、64.76%；TP去除率分别为65.18%、67.17%、43.44%；DBP去除率分别为96.72%、97.32%、96.53%；DEHP去除率分别为91.89%、81.57%、74.30%.在3DBER-S-Fe系统内，存在异养、氢自养、硫自养反硝化脱氮过程，当HRT由8h缩短到4h时，单质硫可以弥补进水NO3--N负荷增加所导致的反硝化电子供体相对不足问题，维持系统高效的脱氮效率；系统中海绵铁填料腐蚀产生的铁离子能够高效持续沉淀除磷；3DBER-S-Fe工艺结合了物理吸附、生物降解及电化学作用，使其在不同HRT条件下具有较高的DBP与DEHP去除率. |
| 英文摘要 |
| In order to explore the technological characteristics of the simultaneous removal of phthalate esters (PAEs) as well as nitrogen and phosphorus by the novel technology of three-dimensional biofilm-electrode coupled with iron/sulfur reactor (3DBER-S-Fe), the changes of the total nitrogen (TN),total phosphorus (TP),DBP,DEHP,NO3--N, SO42- and pH value were analyzed under the hydraulic retention time (HRT) of 8 h, 6 h and 4 h respectively. The results showed that 3DBER-S-Fe could remove nitrogen, phosphorus and PAEs effectively. Under the HRT of 8 h, 6 h and 4 h, the removal rates of TN were 80.99%, 78.85% and 64.76%; TP were 65.18%, 67.17% and 43.44%; DBP were 96.72%, 97.32% and 96.53%; DEHP were 91.89%, 81.57% and 74.30%, respectively. There were heterotrophic denitrification, hydrogen autotrophic denitrification and sulfur autotrophic denitrification processes in the 3DBER-S-Fe, the elemental sulfur could compensate for the relative shortage of denitrification electron donor caused by the increase of NO3--N load in the influent as a result of maintaining a high efficiency of the denitrification system when the HRT was shortened from 8h to 4h; the iron ions produced by the corrosion of the sponge iron filler in the system had a sustainable and efficient function of removing phosphorus by precipitation; the 3DBER-S-Fe process combined the interactions of physical adsorption, biological degradation and electrochemical processes which supported its high removal rates of DBP and DEHP under the different HRT conditions. |
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