Zhou Zheng, Lin Xing, Wang Fan, Gu Cheng-Wei, Shen Jing, Yuan Yan, Jin Run
School of Environment Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou 215009, China.
Huan Jing Ke Xue. 2017 Aug 8;38(8):3377-3384. doi: 10.13227/j.hjkx.201702124.
An integrated partial nitrification anaerobic ammonia oxidation reactor was used to explore the feasibility of nitrogen removal from recycled ethanol wastewater. The results show that the integrated partial nitrification-anaerobic ammonia oxidation (PN-ANAMMOX) reactor was started successfully after 40 d under the conditions of pH 7.8±0.5, temperature 30-35℃, and aerobic ORP value 120-150 mV. The total nitrogen removal rate of 0.125 kg·(m·d) increased to 0.75 kg·(m·d), Inoculation of mature nitrosated biofilms and anaerobic ammonium oxide granules can accelerate the start of the reactor. The effects of alcohol wastewater on the PN-ANAMMOX reactor were mainly caused by biodegradable TOC, The biodegradable TOC concentration of 100mg·L in alcohol wastewater can reduce the removal rate of total nitrogen from 0.75 kg·(m·d) to 0.25 kg·(m·d),this inhibition can be restored. Different concentrations of alcohol wastewater were dosed into the PN-ANAMMOX reactor to acclimate the bacteria. The total nitrogen removal rate first decreased and then increased, as the influent concentration gradient increased, which was beneficial for improving the efficiency of nitrogen removal by extending the HRT and increasing the dissolved oxygen in the PN stage. Finally, the nitrogen removal rate stabilized at 0.65 kg·(m·d). These results show that PN-ANAMMOX can be used for the treatment of alcohol wastewater.
采用一体化亚硝化厌氧氨氧化反应器，探究回收乙醇废水脱氮的可行性。结果表明，一体化亚硝化-厌氧氨氧化（PN-ANAMMOX）反应器在pH 7.8±0.5、温度30-35℃、好氧氧化还原电位值120-150 mV的条件下，40 d后成功启动。总氮去除率由0.125 kg·(m·d)提高到0.75 kg·(m·d)，接种成熟的亚硝化生物膜和厌氧氨氧化颗粒可加速反应器启动。酒精废水对PN-ANAMMOX反应器的影响主要由可生物降解的总有机碳引起，酒精废水中100mg·L的可生物降解总有机碳浓度可使总氮去除率从0.75 kg·(m·d)降至0.25 kg·(m·d)，这种抑制作用可恢复。向PN-ANAMMOX反应器中投加不同浓度的酒精废水驯化细菌，随着进水浓度梯度增加，总氮去除率先下降后上升，这有利于通过延长水力停留时间和增加PN阶段溶解氧来提高脱氮效率。最终，氮去除率稳定在0.65 kg·(m·d)。这些结果表明，PN-ANAMMOX可用于处理酒精废水。
