...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Bench-scale Study On Zero Excess Activated Sludge Production Process Coupled With Ozonation Unit In Membrane Bioreactor
【24h】

Bench-scale Study On Zero Excess Activated Sludge Production Process Coupled With Ozonation Unit In Membrane Bioreactor

机译：膜生物反应器中零臭氧活性污泥生产工艺与臭氧化装置结合的实验研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this bench-scale study, two promising processes for minimizing excess activated sludge (EAS) production, i.e., membrane bioreactor (MBR) and sludge ozonation (SO), were coupled in this study into the MBR-SO process to treat domestic wastewater for 80 days, and the vital related operational factors were also investigated.Mathematical models were developed to elucidate the relationships among process control parameters and the actually operational effects of these parameters on the performance of MBR-SO process.As a consequence, the ratio of flow-rate draining to ozonation unit (q) to influent wastewater flow-rate (Q) was the mainly operational parameter, which was significantly affected by the sludge lysing ratio in ozonation unit (ξ), produced COD per unit mass lysed MLSS (η), observed sludge yield coefficient for wastewater (Y_(obs)) and intrinsic yield coefficient for COD produced by lysed sludge (Y_2).To keep the mixed liquid suspended solid concentration (MLSS) in MBR around 8000 mg/L, the ratio of q/Q and ξ for each batch ozonation was set at 0.0067 and 0.72, respectively.The generated EAS was continuously drained into ozonation unit at a frequency of 2 batch/d for lysing cells, and almost constant MLSS concentration with zero observed sludge yield coefficient (Y_(obs)) and excellent effluent quality could be achieved in MBR except for TP concentration (only approximately 3.62% TP removal efficiency rate obtained in Test stage).The calculation of sludge disintegration number (SDN) and the maximum SDN (SDN_(max)) indicated that the higher ξ could reduce apparently the sludge amount needed for ozonation.The low input ozone gas concentration and high flow-rate could enhance the sludge lysing effects at same ozone dosage, and therefore lower energy consumption of 0.041 Yuan (US$0.0053)/m~3wastewatcr was obtained.Overall, mass balance showed that the preset value of operation parameters listed in mathematical models matched well with trends of sludge reduction found in this experimental result.
机译：在这项规模研究中，将膜生物反应器（MBR）和污泥臭氧化（SO）两种方法用于最小化过量活性污泥（EAS）的生产，将其与MBR-SO工艺相结合，用于处理生活污水。 80天后，还研究了重要的相关操作因素，建立了数学模型以阐明过程控制参数之间的关系以及这些参数对MBR-SO工艺性能的实际操作影响。排放到臭氧化装置（q）的速率到进水废水流速（Q）是主要的操作参数，它受到臭氧化装置（ξ）中污泥溶解率的显着影响，每单位质量裂解液MLSS产生的COD（η） ，观察到的废水污泥产率系数（Y_（obs））和裂解污泥产生的COD固有产率系数（Y_2）。要使MBR中的混合液体悬浮固体浓度（MLSS）保持在800附近0 mg / L时，每批次臭氧化的q / Q和ξ的比率分别设置为0.0067和0.72。产生的EAS以2批次/ d的频率连续排放到臭氧化装置中以裂解细胞，并且几乎恒定除TP浓度外（在试验阶段仅获得约3.62％的TP去除效率），MBR可获得MLSS浓度，观察到的污泥产率系数（Y_（obs））为零，且出水水质优异。 ）和最大SDN（SDN_（max））表示，ξ越高显然可以减少进行臭氧化所需的污泥量。低输入臭氧气体浓度和高流速可以增强相同臭氧剂量下的污泥裂解效果，因此能耗降低了0.041元（0.0053美元）/ m〜3废水。总体而言，质量平衡表明，数学模型中列出的运行参数的预设值与污泥减量趋势相吻合。和这个实验结果。

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