Tizghadam Mostafa, Dagot Christophe, Baudu Michel
Laboratoire des Sciences de l'Eau et de l'Environnement, Université de Limoges, ENSIL, Parc ESTER, 16 Rue Atlantis, F-87068 Limoges Cedex, France.
J Hazard Mater. 2008 Jun 15;154(1-3):550-7. doi: 10.1016/j.jhazmat.2007.10.092. Epub 2007 Oct 30.
A novel hybrid activated sludge baffled reactor (HASBR), which contained both suspended and attached-growth biomass perfect mixing cells in series, was developed by installing standing and hanging baffles and introducing plastic brushes into a conventional activated sludge (CAS) reactor. It was used for the treatment of domestic wastewater. The effects on the operational performance of developing the suspended and attached-growth biomass and reactor configuration were investigated. The change of the flow regime from complete-mix to plug-flow, and the addition of plastic brushes as a support for biofilm, resulted in considerable improvements in the COD, nitrogen removal efficiency of domestic wastewater and sludge settling properties. In steady state, approximately 98+/-2% of the total COD and 98+/-2% of the ammonia of the influent were removed in the HASBR, when the influent wastewater concentration was 593+/-11 mg COD/L and 43+/-5 mg N/L, respectively, at a HRT of 10 h. These results were 93+/-3 and 6+/-3% for the CAS reactor, respectively. Approximately 90+/-7% of the total COD was removed in the HASBR, when the influent wastewater concentration was 654+/-16 mg COD/L at a 3h HRT, and in the organic loading rate (OLR) of 5.36kgCOD m(-3) day(-1). The result for the CAS reactor was 60+/-3%. Existing CAS plants can be upgraded by changing the reactor configuration and introducing biofilm support media into the aeration tank.
一种新型混合活性污泥折流板反应器（HASBR）通过在传统活性污泥（CAS）反应器中安装立式和悬挂式折流板并引入塑料刷而开发，该反应器串联包含悬浮生长和附着生长的生物质完全混合单元，用于处理生活污水。研究了开发悬浮生长和附着生长生物质以及反应器配置对运行性能的影响。流态从完全混合变为推流，以及添加塑料刷作为生物膜的载体，使得生活污水的化学需氧量（COD）、氮去除效率和污泥沉降性能有了显著提高。在稳态下，当进水废水浓度分别为593±11mg COD/L和43±5mg N/L，水力停留时间（HRT）为10h时，HASBR中约98±2%的总COD和98±2%的氨被去除。对于CAS反应器，这些结果分别为93±3%和6±3%。当进水废水浓度为654±16mg COD/L，HRT为3h，有机负荷率（OLR）为5.36kgCOD m⁻³ day⁻¹时，HASBR中约90±7%的总COD被去除。CAS反应器的结果为60±3%。现有的CAS处理厂可以通过改变反应器配置并在曝气池中引入生物膜载体介质进行升级。
