State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
Research Center of Water Pollution Control Technology, Chinese Research Academy of Environment Sciences, Beijing, 100012, China.
Environ Sci Pollut Res Int. 2018 Mar;25(9):8315-8329. doi: 10.1007/s11356-018-1393-8. Epub 2018 Feb 6.
The combination of ozone and biological aerated filter (O/BAF) has been widely studied and applied in polishing different biological secondary effluents. O/BAF has the advantages of high pollutants removal rate, low operating cost, and flexible combination types. The principle and combination, effect of ozone dosage and influent suspended solids (SS) on O/BAF, applications, current research focuses, and development are discussed. The ozone can break refractory macromolecules into small and biodegradable fragments, increasing the biodegradation. It benefits the operation of BAF. The coupling of ozonation and BAF is efficient in the removal of refractory organic pollutants from different wastewaters. Ozonation can also be used as the post-treatment option after BAF to guarantee the effluent qualities. Normally, the ozone dosage varied from 5 to 125 mg/L with the contact time of 4 to 60 min, while the hydraulic retention time (HRT) of BAF is usually between 2 to 5 h when treating different biological effluents. The effluent COD is normally lower than 50 mg/L. Most of the organic micropollutants (OMPs) in the biological effluent, such as antibiotics, pharmaceuticals, personal care products, steroid hormones, and industrial chemicals, can be efficiently removed by O/BAF. More importantly, the O/BAF can obviously reduce the toxicity of the wastewater. The residual ozone of about 0.2 mg/L in the ozonation effluent benefits the performance of BAF. The future trends of O/BAF are also discussed in the paper.
臭氧与生物曝气滤池（O/BAF）的组合已被广泛研究并应用于不同生物二级出水的深度处理。O/BAF 具有污染物去除率高、运行成本低、组合类型灵活等优点。本文讨论了 O/BAF 的原理与组合方式、臭氧投加量和进水悬浮物（SS）对 O/BAF 的影响、应用、当前研究重点及发展趋势。臭氧可以将难生物降解的大分子物质分解成小而可生物降解的片段，提高生物降解性，有利于 BAF 的运行。臭氧氧化与 BAF 的耦合在去除不同废水中的难生物降解有机污染物方面非常有效。臭氧氧化也可以作为 BAF 的后处理选择，以保证出水水质。通常，臭氧投加量为 5-125mg/L，接触时间为 4-60min，而 BAF 的水力停留时间（HRT）通常在 2-5h 之间，处理不同的生物出水。出水 COD 通常低于 50mg/L。生物出水中的大多数有机微污染物（OMPs），如抗生素、药物、个人护理产品、类固醇激素和工业化学品，都可以通过 O/BAF 有效去除。更重要的是，O/BAF 可以明显降低废水的毒性。臭氧氧化出水中约 0.2mg/L 的剩余臭氧有利于 BAF 的性能。本文还讨论了 O/BAF 的未来发展趋势。
