Cultivation of a versatile manganese-oxidizing aerobic granular sludge for removal of organic micropollutants from wastewater
Cultivation of a versatile manganese-oxidizing aerobic granular sludge for removal of organic micropollutants from wastewater
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培养多功能锰氧化好氧颗粒污泥以去除废水中的有机微污染物
DOI：
10.1016/j.scitotenv.2019.06.509
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发表时间：
2019-11-10
影响因子：
9.8
通讯作者：
Pan, Xiangliang
中科院分区：
文献类型：
--
作者：
He, Zhanfei;Zhang, Qingying;Pan, Xiangliang
有机微污染物（Organic micropollutants，OMPs）是水和废水中常见的污染物，由于其对生态系统和人类健康的潜在危害而受到广泛关注。本研究成功培养了锰氧化好氧颗粒污泥（Mn-AGS），并将其应用于去除废水中的有机金属化合物。生物锰（III，IV）氧化物（生物MnOx）的产生和积累到22.0-28.3毫克锰/克SS在最终的污泥。无论是外来锰氧化细菌（MnOB;恶臭假单胞菌MnB 1）的加入，也不减少水力停留时间（HRT）促进锰-AGS的培养。OMPs降解的批实验表明，Mn-AGS显著提高了大多数OMPs的降解率（1.3-3.9倍）。传统AGS对双酚A（BPA）、17 α-乙炔基苯酚（EE 2）、四环素（TC）和氯霉素（CAP）的去除率为3.0-12.6 μ g/h/g SS，Mn-AGS为8.0-16.3 μ g/h/g SS;咪唑乙烟酸（IM）的AGS法和Mn-AGS法测定值分别为64.7 ± 0.1和127.8 ± 25 μ g/h/g SS。然而，Mn-AGS对二氯苯膦（DCPP）的降解比AGS慢，分别为9.0 +/- 0.4和21.2 +/- 0.9 μ g/h/g SS，这可能是由于生物MnOx抑制了微生物活性。本工作为有机废水中有机金属氧化物的处理提供了一种有前途的方法，但生物MnOx可能对微生物有抑制作用。(C)2019 Elsevier B. V.版权所有。
Organic micropollutants (OMPs) arc frequently detected in water and wastewater, and have attracted wide attention due to potential adverse effects on ecosystems and human health. In this work, manganese-oxidizing aerobic granular sludge (Mn-AGS) was successfully cultivated and applied to remove OMPs from wastewater. Biogenic manganese (III,IV) oxides (bio-MnOx) were generated and accumulated to 22.0-28.3 mg Mn/g SS in the final sludge. Neither the addition of allochthonous manganese-oxidizing bacteria (MnOB; Pseudomonas putida MnB1) nor the reduction in hydraulic retention time (HRT) facilitated the cultivation of Mn-AGS. Batch experiments of OMPs degradation indicated that Mn-AGS significantly improved (1.3-3.9 times) degradation rates of most OMPs. Removal rates of bisphenol A (BPA), 17 alpha ethinylestradiol (EE2), tetracycline (TC), and chloramphenicol (CAP) were 3.0-12.6 mu g/h/g SS by the traditional AGS and 8.0-16.3 mu g/h/g SS by Mn-AGS; those of imazethapyr (IM) were relatively high, 64.7 +/- 0.1 and 127.8 +/- 25 mu g/h/g SS by AGS and Mn-AGS, respectively. However, degradation of dichlorophenyl phosphine (DCPP) was slower by Mn-AGS than AGS, 9.0 +/- 0.4 vs. 21.2 +/- 0.9 mu g/h/g SS, possibly due to inhibition of microbial activity by bio-MnOx. This work provides a promising method for treating OMPs in organic wastewater, but the possible inhibition of microbes by bio-MnOx should be noted. (C) 2019 Elsevier B.V. All rights reserved.