pH冲击对海洋厌氧氨氧化菌处理含海水污水脱氮效能的影响

发布时间：2018-03-30 16:25

本文选题：海洋厌氧氨氧化菌　切入点：pH冲击　出处：《环境科学》2017年08期

【摘要】：采用ASBR反应器,研究了pH冲击对海洋厌氧氨氧化菌处理含海水污水脱氮效能的影响,并利用Andrew模型和Ratkowsky模型模拟pH冲击下海洋厌氧氨氧化菌的脱氮过程.结果表明,当pH在7~8时,反应器的脱氮效果最佳,氨氮去除负荷(NRR)稳定在(0.30±0.04)kg·(m~3·d)~(-1),总氮去除率(TNRE)在(76.73±5.74)%;当pH为8.5时,游离氨(FA)的平均浓度为14.22 mg·L~(-1),该FA浓度对NRR的影响较小,NRR仍维持在(0.30±0.02)kg·(m~3·d)~(-1)左右,但是NO_2~--N在pH的直接影响下出现了积累,不能够完全去除,此条件不利于反应器的稳定运行;当pH为6.5和9时,FA浓度分别为0.22mg·L~(-1)和37.84 mg·L~(-1),NRR分别低至(0.10±0.02)kg·(m~3·d)~(-1)和(0.15±0.02)kg·(m~3·d)~(-1),且TNRE仅为(23.04±9.88)%和(42.12±5.52)%.海洋厌氧氨氧化菌在碱性条件下的耐受性强于酸性条件.采用修正的Andrew模型进行拟合,得到了NRR与FA之间的相互关系,同时还可以得到NRR_(max)、k_S和k_I等参数,对于表征海洋厌氧氨氧化菌的脱氮过程具有实际意义.
[Abstract]:The effect of pH shock on the denitrification efficiency of marine anaerobic ammonia-oxidizing bacteria in seawater wastewater was studied by using ASBR reactor. The process of denitrification of marine anaerobic ammonia-oxidizing bacteria under pH shock was simulated by Andrew model and Ratkowsky model. When pH was 7 ~ 8, the denitrification effect of the reactor was the best, the removal rate of ammonia nitrogen was stable at 0.30 卤0.04)kg ~ (-1) and the removal rate of total nitrogen was 76.73 卤5.74 ~ 0.The average concentration of free ammonia ~ + was 14.22 mg / L ~ (-1) when pH was 8.5, and the effect on NRR was still about 0.30 卤0.02)kg ~ (3) ~ (-1), and the effect of NH ~ (2 +) on NRR was about 0.30 卤0.02)kg ~ (3) d ~ (-1) when pH was 8 ~ 8, the average concentration of NH _ (2 +) was 14.22 mg / L ~ (-1), and the effect of NH ~ (2 +) N ~ (2 +) on NRR was about 0.30 卤0.02)kg ~ (3) d ~ (-1). However, the accumulation of NO_2~--N under the direct influence of pH can not be completely removed, which is not conducive to the stable operation of the reactor. When the pH was 6.5 and 9 渭 m ~ (-1) and 37.84 mg / L ~ (-1) respectively as low as 0.10 卤0.02)kg ~ (3) d ~ (-1) and 0.15 卤0.02)kg ~ (3) d ~ (-1), the TNRE was 23.04 卤9.88% and 42.12 卤5.52% respectively. The tolerance of marine anaerobic ammonia oxidizing bacteria was stronger than that of acid condition. The modified Andrew model was used to fit the results. The relationship between NRR and FA is obtained, and the parameters such as NRR _ S and K _ S _ I can be obtained, which is of practical significance for characterizing the denitrification process of marine anaerobic ammonia-oxidizing bacteria.
【作者单位】：青岛大学环境科学与工程学院;
【基金】：国家自然科学基金项目(51278258,51478229) 山东省自然科学基金项目(BS2015HZ007) 山东省高等学校科技计划项目(J15LC61)
【分类号】：X172;X703

【参考文献】