Furukawa Kenji, Inatomi Yasuhiko, Qiao Sen, Quan Lai, Yamamoto Taichi, Isaka Kazuichi, Sumino Tatsuo
Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan.
Bioresour Technol. 2009 Nov;100(22):5437-43. doi: 10.1016/j.biortech.2008.11.055. Epub 2009 Feb 5.
This study demonstrated that partial nitritation using nitrifying activated sludge entrapped in a polyethylene glycol (PEG) gel carrier, as a pretreatment to anammox process, could be successfully applied to digester liquor of biogas plant at a nitrogen loading rate of 3.0 kg-N/m(3)/d. The nitritation process produced an effluent with a NO(2)-N/NH(4)-N ratio between 1.0 and 1.4, which was found to be suitable for the subsequent anammox process. A high SS concentration (2000-3000 mg/l) in the digester liquor did not affect partial nitritation treatment performances. Effluent from this partial nitritation reactor was successfully treated in the anammox reactor using anammox sludge entrapped in the PEG gel carrier with T-N removal rates of greater than 4.0 kg-N/m(3)/d. Influent BOD and SS contents did not inhibit anammox activity of the anammox gel carrier. The combination of partial nitritation and anammox reactors using PEG entrapped nitrifying and anammox bacteria was shown to be effective for the removal of high concentration ammonium in the digester liquor of a biogas plant.
本研究表明，以聚乙二醇（PEG）凝胶载体截留的硝化活性污泥进行部分亚硝化作为厌氧氨氧化工艺的预处理，能够以3.0 kg-N/m³/d的氮负荷率成功应用于沼气厂的消化液处理。亚硝化过程产生的出水的NO₂-N/NH₄-N比值在1.0至1.4之间，发现该比值适合后续的厌氧氨氧化工艺。消化液中高浓度的SS（2000 - 3000 mg/l）并不影响部分亚硝化处理性能。该部分亚硝化反应器的出水在厌氧氨氧化反应器中使用PEG凝胶载体截留的厌氧氨氧化污泥成功处理，总氮去除率大于4.0 kg-N/m³/d。进水的BOD和SS含量并未抑制厌氧氨氧化凝胶载体的厌氧氨氧化活性。使用PEG截留硝化菌和厌氧氨氧化菌的部分亚硝化和厌氧氨氧化反应器组合被证明对去除沼气厂消化液中的高浓度铵有效。
