| 盐度对中试厌氧氨氧化脱氮特性的影响及其恢复动力学 |
| 摘要点击 1836 全文点击 573 投稿时间：2018-04-11 修订日期：2018-05-02 |
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| 中文关键词 含盐废水 厌氧氨氧化(ANAMMOX) 厌氧序批式反应器(ASBR) 驯化 动力学 |
| 英文关键词 salinity wastewater anaerobic ammonia oxidation (ANAMMOX) anaerobic sequencing batch reactor (ASBR) domestication kinetics |
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| 中文摘要 |
| 采用中试ASBR反应器（530 L），以逐步提高Cl-浓度的方式考察了厌氧氨氧化菌（AnAOB）处理高盐废水的脱氮特性.结果表明，采用逐步盐度驯化的方式，AnAOB可适应高盐度（Cl-浓度10000 mg·L-1）环境进行高效脱氮（TN去除率高达92.3%）.其中，在Cl-浓度6000 mg·L-1和10000 mg·L-1两个梯度内，反应器脱氮性能受到了较大影响，但随着驯化过程的持续进行可逐步恢复.修正的Boltzmann模型能较为准确地拟合AnAOB受到不同盐度抑制后的活性恢复过程，相关系数R2均在0.96以上.得到的Cl-浓度6000 mg·L-1和10000 mg·L-1时的恢复中间值tc分别为28.765 d和44.495 d，NRRmax分别为0.145 kg·（m3·d）-1和0.212 kg·（m3·d）-1，NRRmin分别为0.021 kg·（m3·d）-1和0.085 kg·（m3·d）-1.高盐度驯化后，厌氧氨氧化菌仍主要为Candidatus Brocadia和Candidatus Jettenia（其丰度分别是14.76%和2.7%），且污泥颗粒化程度和污泥密度均有不同程度的提高，污泥呈红褐色. |
| 英文摘要 |
| The denitrification characteristics of anaerobic ammonia oxidizing bacteria (AnAOB) treating high salinity wastewater were investigated in an pilot-scale anaerobic sequencing batch reactor (ASBR, 530 L) by gradually increasing the Cl- concentration. The results showed that AnAOB can adapt to the high salinity (Cl- concentration of 10000 mg·L-1) environment for high-efficiency denitrification by means of gradual salinity acclimation and total nitrogen (TN) removal rate of up to 92.3%. In particular, the denitrification performance was influenced by two gradients of Cl- concentrations, namely 6000 mg·L-1 and 10000 mg·L-1, but it could be gradually recovered as the acclimatization process continued. The modified Boltzmann model accurately fit the activity recovery process of AnAOB after being inhibited by the different salinities, and the correlation coefficient R2 was above 0.96. The fitted recovered median values tc for Cl- concentrations of 6000 mg·L-1 and 10000 mg·L-1 were 28.765 d and 44.495 d. NRRmax for these concentrations was 0.145 kg·(m3·d)-1 and 0.212 kg·(m3·d)-1, and NRRmin was 0.021 kg·(m3·d)-1 and 0.085 kg·(m3·d)-1, respectively. After salinity acclimation, the dominant bacteria of AnAOB were Candidatus Brocadia and Candidatus Jettenia (the abundances were 14.76% and 2.7%, respectively), the granulation degree and sludge density increased to varying degrees, and the sludge color was reddish brown. |
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