Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
Bioresour Technol. 2014 Aug;166:630-4. doi: 10.1016/j.biortech.2014.05.105. Epub 2014 Jun 3.
Nutrients management is a key task of wastewater treatment and removal of nutrients is usually associated with significant energy/economic cost. A new bioelectrochemical system, named "R(2)-BES", was developed for removing and possibly recovering nutrients from wastewater. This R(2)-BES takes advantage of bioelectricity generation from oxidation of organic compounds to drive ammonium migration out of wastewater, and uses hydroxide ions produced from the cathode reaction as a medium to exchange phosphate ions from wastewater at the same time. Under an applied voltage of 0.8 V, the R(2)-BES removed 83.4 ± 1.3% of ammonium nitrogen and 52.4 ± 9.8% of phosphate, significantly higher than those (3.6 ± 3.7% and 21.1 ± 2.6%) under an open circuit condition. Applying an external voltage can increase current generation, COD removal, and nutrient removal. Those results demonstrate a proof of concept that the R(2)-BES may be potentially applied to remove and recover nutrients through appropriate integration into the existing treatment facilities.
营养物质管理是废水处理的关键任务，而去除营养物质通常与大量的能源/经济成本相关。一种新的生物电化学系统，命名为“R(2)-BES”，被开发用于从废水中去除和可能回收营养物质。这种 R(2)-BES 利用有机化合物氧化产生的生物电能来驱动氨氮从废水中迁移出来，并利用阴极反应产生的氢氧根离子作为介质，同时从废水中交换磷酸盐离子。在 0.8 V 的外加电压下，R(2)-BES 去除了 83.4 ± 1.3%的氨氮和 52.4 ± 9.8%的磷酸盐，明显高于开路条件下的 3.6 ± 3.7%和 21.1 ± 2.6%。施加外部电压可以增加电流产生、COD 去除和营养物质去除。这些结果证明了一个概念，即 R(2)-BES 可以通过适当整合到现有的处理设施中，有潜力用于去除和回收营养物质。
