Division of Water Environment Technology, Civil and Environmental Engineering, Chalmers University of Technology, SE-41296 Gothenburg, Sweden.
Bioresour Technol. 2013 Oct;146:530-536. doi: 10.1016/j.biortech.2013.07.130. Epub 2013 Aug 2.
In this study, a bioelectrochemical reactor was investigated for simultaneous hydrogen production and ammonium recovery from reject water, which is an ammonium-rich side-stream produced from sludge treatment processes at wastewater treatment plants. In the anode chamber of the reactor, microorganisms converted organic material into electrical current. The electrical current was used to generate hydrogen gas at the cathode with 96±6% efficiency. Real or synthetic reject water was fed to the cathode chamber where proton reduction into hydrogen gas resulted in a pH increase which led to ammonium being converted into volatile ammonia. The ammonia could be stripped from the solution and recovered in acid. Overall, ammonium recovery efficiencies reached 94% with synthetic reject water and 79% with real reject water. This process could potentially be used to make wastewater treatment plants more resource-efficient and further research is warranted.
在这项研究中，研究了一种生物电化学反应器，用于从废水处理厂污泥处理过程中产生的富含铵的侧流——废弃水中同时生产氢气和回收铵。在反应器的阳极室中，微生物将有机物质转化为电流。电流用于在阴极以 96±6%的效率产生氢气。实际或合成的废弃水被输送到阴极室，质子在阴极还原成氢气导致 pH 值升高，从而将铵转化为挥发性氨。氨可以从溶液中汽提并在酸中回收。总体而言，用合成废弃水的铵回收效率达到 94%，用实际废弃水的铵回收效率达到 79%。该工艺有可能使废水处理厂更具资源效率，因此需要进一步研究。
