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首页> 外文会议>Membrane technology 2008 >DIFFERENCES IN AERATION AND AIR SCOUR ENERGY REQUIREMENTSBETWEEN MEMBRANE BIOREACTORS, CONVENTIONAL ACTIVATED SLUDGE(CAS), IFAS AND MBBR FOLLOWING PROCESS OPTIMIZATION
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DIFFERENCES IN AERATION AND AIR SCOUR ENERGY REQUIREMENTSBETWEEN MEMBRANE BIOREACTORS, CONVENTIONAL ACTIVATED SLUDGE(CAS), IFAS AND MBBR FOLLOWING PROCESS OPTIMIZATION

机译：膜生物反应器，常规活性污泥（CAS），IFAS和MBBR遵循过程优化之间在充气和气源能量要求方面的差异

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Hollow fiber membrane bioreactors (MBRs) were evaluated in full scale to study methods ofrnreducing their aeration and air scour energy requirements. The changes were modeled to determinernmethods to optimize the aeration and air scour energy consumption and compare the total to thernaeration energy requirements of conventional activated sludge (CAS), IFAS and MBBR systems.rnThe research found that the aeration and air scour energy required for an MBR can be reduced tornwithin 33% above conventional activated sludge (CAS) systems operating with 50 percent morernvolume (Aeration Optimized Mode, AOM). It can be reduced further to within 20% withrnautomated DO and ammonium-N monitoring and control in the aerobic zone and the membranerncell, or at facilities which can discharge effluent ammonium-N above 0.5 mg/L during some weeksrn(Aeration Constrained Mode, ACM). The optimization techniques included reduction of the DO setrnpoint in the main reactor to 1 mg/L for AOM and 0.5 mg/L for ACM; reduction in the air scour onrntime from 100 % to 25 %. The air scour air flow rate was controlled such that it was just above 18rnmm/sec during the on time. The combination of these two changes reduced the DO levels in thernmembrane cell from greater than 6 mg/L to less than 4 mg/L. The energy requirements for MBRsrnwere then compared to other compact solutions such as IFAS and MBBRs. In the MLE processrnconfiguration and ACM, the MBR consumed 4 to 7 % more aeration and air scour energy thanrnIFAS and MBBR, respectively. In the Enhanced Nutrient Removal (ENR) mode, in which methanolrnis added to the post-anoxic cells to increase denitrification, the MBR consumed similar amountsrncompared to IFAS and MBBRs, with all processes achieving 4 mg/L Total Nitrogen (TN).
机译：对中空纤维膜生物反应器（MBR）进行了全面评估，以研究减少其曝气和空气冲刷能量需求的方法。对这些变化进行建模，以确定优化曝气和空气冲刷能耗的方法，并将总能耗与常规活性污泥（CAS），IFAS和MBBR系统的曝气能量需求进行比较。研究发现，MBR所需的曝气和冲气能量与传统的活性污泥（CAS）系统相比，其工作量可增加50％（曝气优化模式，AOM），可减少33％的破坏。通过在需氧区和膜细胞或在几周内可以排放0.5 mg / L以上的铵态氮的设施中进行自动化的DO和铵态氮监测和控制，可将其进一步降低至20％以内（曝气约束模式，ACM ）。优化技术包括将主反应器中的DO设定值降低到AOM的1 mg / L和ACM的0.5 mg / L。空气冲刷时间从100％减少到25％。控制空气冲刷空气的流速，以使它在开启时间内刚好高于18rnmm / sec。这两种变化的结合将膜细胞中的溶解氧水平从大于6 mg / L降低到小于4 mg / L。然后将MBRsrn的能源需求与其他紧凑型解决方案（如IFAS和MBBR）进行了比较。在MLE工艺配置和ACM中，MBR分别比IFAS和MBBR消耗4至7％的曝气和空气冲刷能量。在增强型营养去除（ENR）模式下，其中甲醇被添加到缺氧后的细胞中以增加反硝化作用，MBR消耗的量与IFAS和MBBR相似，所有过程均达到4 mg / L总氮（TN）。

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