• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Four-stage biofilm anaerobic–anoxic–oxic–oxic system for strengthening the biological treatment of coking wastewater: COD removal behaviors and biokinetic modeling
【24h】

Four-stage biofilm anaerobic–anoxic–oxic–oxic system for strengthening the biological treatment of coking wastewater: COD removal behaviors and biokinetic modeling

机译：加强焦化废水生物处理的四级生物膜厌氧-缺氧-氧-氧系统：COD去除行为和生物动力学模型

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

High-strength coking wastewater with a high chemical oxygen demand (COD) was efficiently treated by a novel pilot-scale four-stage biofilm anaerobic–anoxic–oxic–oxic (FB-A2/O2) system. The results demonstrated that the system played an important role in obtaining an overall COD removal efficiency at a hydraulic detention time (HRT) of 116 h and over 60% of COD was removed in A2 and O1 reactors. Three different mathematical models, including the Grau second-order model, modified Stover–Kincannon model, and the Monod-biological contact oxidation model (Monod-BCO model) were applicable to describe the COD removal efficiency of the FB-A2/O2 system. Based on a kinetics study and model evaluation, the Monod-BCO model was demonstrated to be more applicable to COD removal from the system with an average determination coefficient of 0.9661. According to the Monod-BCO model, the COD maximum utilization rates for a unit area of carrier for the A1, A2, O1, and O2 units were 0.1685 g (m2 d)?1, 0.8384 g (m2 d)?1, 0.4654 g (m2 d)?1, and 0.2689 g (m2 d)?1, respectively. The refractory organics in each reactor were further evaluated by the Monod-BCO model. The results proved that the system had great potential for treating high-COD coking wastewater. Step-feeding after the A1 reactor was strongly suggested to further optimize the feeding pattern of the system, depending on the model evaluation.
机译：新型中试规模的四阶段生物膜厌氧-缺氧-有氧-有氧（FB-A 2 < / small> / O 2 ）系统。结果表明，该系统在水力滞留时间（HRT）为116 h时，在获得整体COD去除效率方面起着重要作用，并且在A 2 < / small>和O 1 反应堆。三种不同的数学模型，包括Grau二级模型，改进的Stover-Kincannon模型和Monod-生物接触氧化模型（Monod-BCO模型），可用于描述FB-A的COD去除效率。 sup> 2 / O 2 系统。基于动力学研究和模型评估，证明Monod-BCO模型更适用于从系统中去除COD，其平均测定系数为0.9661。根据Monod-BCO模型，A 1 ，A 2 的载体单位面积的COD最大利用率，O 1 和O 2 单位为0.1685 g（m 2 d） ？1 ，0.8384 g（m 2 d） ？1 ，0.4654克（m 2 d） ？1 和0.2689 g（m 2 d） ？1 。通过Monod-BCO模型进一步评估每个反应器中的难熔有机物。结果证明该系统具有处理高COD焦化废水的巨大潜力。强烈建议在A 1 反应器之后分步进料，以进一步优化系统的进料方式，具体取决于模型评估。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号