残余臭氧增强了微生物对有机物的去除，并塑造了微生物群落。
Residual ozone in microorganisms enhanced organics removal and shaped microbial community.
机构信息
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Research Center of Environmental Pollution Control Engineering Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; School of Environment, Tsinghua University, Beijing, 100084, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Research Center of Environmental Pollution Control Engineering Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
出版信息
Chemosphere. 2021 Sep;278:130322. doi: 10.1016/j.chemosphere.2021.130322. Epub 2021 Mar 25.
The residual ozone played an important role in enhancing the organics removal by stimulate subsequent biological processes. However, how the residual ozone affects the biological process is not well studied. In this work, a pilot scale integrated O-BAF, ordinary BAF and separated O-BAF were compared in advanced treatment of real bio-treated petrochemical wastewater. Results showed that residual ozone with 0.05-0.10 mg L in the BAF demonstrated relatively high chemical oxygen demand (COD) removal efficiency of 48.4%, which was 1.5-fold higher than that obtained by separated O-BAF and 3-fold higher than that obtained by ordinary BAF. The stimulative effect of low dosage of O on biological treatment additionally donated 33.9% of the COD removal in the BAF. The COD removal amount per dosage of ozone reached 5.30 mg-COD/mg-O. The biofilm thickness in the integrated O-BAF was reduced by 30-50% while the dehydrogenase activity (DHA) was improved by 500%, indicating the stimulate effect on the bioactivity. Additionally, Illumina HiSeq sequencing of 16S rRNA gene amplicons demonstrated significant microbial diversity decreasing. Specially, Gemmatimonadetes and Bacteroidetes are the dominate microorganism in the integrated O-BAF, having a positive correlation with the proper residual ozone, and increased by 5.4% and 4.2% in comparison with the separated O-BAF, respectively. The residual ozone higher than 0.22 mg L showed inhibition effect on the bioactivity. In summary, the control of residual ozone introduced to BAF was crucial for stimulative effects and manager the microbial community in the integrated O-BAF, which still need further detail research.
剩余臭氧在刺激后续生物过程方面发挥了重要作用，从而提高有机物的去除率。然而，剩余臭氧如何影响生物过程还没有得到很好的研究。在这项工作中，在实际生物处理石化废水的深度处理中，比较了中试规模的集成 O-BAF、普通 BAF 和分离 O-BAF。结果表明，BAF 中具有 0.05-0.10 mg/L 剩余臭氧时表现出相对较高的化学需氧量（COD）去除效率，为 48.4%，是分离 O-BAF 的 1.5 倍，是普通 BAF 的 3 倍。低剂量 O 对生物处理的刺激作用额外贡献了 BAF 中 33.9%的 COD 去除量。臭氧去除量达到 5.30 mg-COD/mg-O。集成 O-BAF 中的生物膜厚度减少了 30-50%，而脱氢酶活性（DHA）提高了 500%，表明对生物活性有刺激作用。此外，Illumina HiSeq 测序 16S rRNA 基因扩增子表明微生物多样性显著降低。特别是，Gemmatimonadetes 和拟杆菌门是集成 O-BAF 中的优势微生物，与适当的剩余臭氧呈正相关，与分离 O-BAF 相比分别增加了 5.4%和 4.2%。高于 0.22 mg/L 的剩余臭氧对生物活性表现出抑制作用。综上所述，控制引入 BAF 的剩余臭氧对于刺激作用和管理集成 O-BAF 中的微生物群落至关重要，这仍需要进一步的详细研究。
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