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首页> 外文会议>American Water Works Association annual conference >A Better Way to do Membrane Bioreactors:Study of a Novel Hybrid Sorption-Membrane-Bioreactor Processfor Concurrent Removal of Ammonia, Iron and Manganese
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A Better Way to do Membrane Bioreactors:Study of a Novel Hybrid Sorption-Membrane-Bioreactor Processfor Concurrent Removal of Ammonia, Iron and Manganese

机译：一种做膜生物反应器的更好方法：同时去除氨，铁和锰的新型混合吸附-膜-生物反应器工艺的研究

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Membrane bioreactors (MBRs) are an attractive technology for drinking water applicationsbecause they provide the advantages of biological treatment and simultaneously mitigate therisk of microorganism passage into the product water. However, current MBR configurationsresult in inherent antagonisms between the membrane performance and the biologicalprocess efficiency. This paper introduces a novel hybrid sorption-membrane-bioreactorconfiguration that resolves these antagonisms and provides additional synergies betweenprocess components. This process configuration consists of an upflow bed of biologicallyactive granular adsorption media situated directly below or adjacent to a microfiltration (MF)or ultrafiltration (UF) membrane and is abbreviated as MBR-UFGA (UpFlow GranularAdsorbent). In this study, a submerged-style UF membrane module was preceded by abiologically active upflow bed of granular pyrolusite (MnO2) adsorption media used forconcurrent biological removal of ammonia and physicochemical removal of iron andmanganese. The MBR-UFGA configuration was compared to a more traditional MBRprocess configuration, where the nitrifying biomass was instead located in the immediatevicinity of the membrane for ammonia removal while physicochemical removal of metalswas achieved with the addition of a powdered activated MnO2 adsorbent and aeration. Thissecond process configuration is abbreviated MBR-PA (Powdered Adsorbent) and provided abaseline for comparison of the proposed novel process. The MBR-UFGA processconfiguration resulted in superior membrane hydraulic performance as it extended thechemical cleaning intervals by over 250% when operated under the same flux and otheroperating conditions. Additional experiments performed without biomass addition indicatedthat the biomass or biologically derived compounds were responsible for the majority of theaccelerated fouling in the more traditional MBR-PA configuration. The novel MBR-UFGAprocess also resulted in a more stable and higher level of removal for ammonia andmanganese. With the MBR-PA process, steadily decreasing biological ammonia removalsresulted from mass transfer limitations that developed as the biomass migrated fromsuspension to the surface of the membrane over the course of the experimental runs.Removal of manganese in the MBR-PA process was initially poor, but increased over time asthe concentration of the powdered adsorbent accumulated in the reactor. This researchfocused on a specific drinking water application, but the findings have equally importantimplications for water reuse and wastewater MBR applications.
机译：膜生物反应器（MBR）是用于饮用水应用的一项有吸引力的技术 因为它们提供了生物治疗的优势，同时减轻了 微生物进入产品水中的风险。但是，当前的MBR配置 导致膜性能和生物学特性之间固有的拮抗作用 工艺效率。本文介绍了一种新型的混合吸附膜生物反应器 解决了这些对抗并提供了其他协同作用的配置 过程组件。该工艺配置由生物上流床组成 直接位于微滤（MF）下方或附近的活性颗粒吸附介质 或超滤（UF）膜，缩写为MBR-UFGA（UpFlow Granular 吸附剂）。在这项研究中，浸没式超滤膜组件之前是 颗粒状软锰矿（MnO2）吸附介质的生物活性上流床用于 同时生物去除氨和物理化学去除铁和 锰。将MBR-UFGA配置与更传统的MBR进行了比较 工艺配置，其中硝化生物质位于附近 膜附近用于去除氨，同时物理化学去除金属 通过添加粉末状的活化MnO2吸附剂和曝气可达到上述目的。这 第二种工艺配置简称为MBR-PA（粉末状吸附剂），并提供了 比较拟议的新方法的基准。 MBR-UFGA工艺 构型由于扩展了 在相同的助焊剂和其他条件下运行时，化学清洗间隔超过250％ 运行条件。未进行生物量添加的其他实验表明 生物质或生物衍生化合物是造成大部分 在更传统的MBR-PA配置中加速了结垢。新颖的MBR-UFGA 该工艺还可以更稳定，更高水平地去除氨和 锰。通过MBR-PA工艺，稳定地减少了生物氨的去除 是由于生物质从中迁移而形成的传质限制 在实验过程中将其悬浮在膜表面上。 最初，MBR-PA工艺中的锰去除率很低，但随着时间的推移，去除率随着时间的推移而增加 在反应器中积累的粉状吸附剂的浓度。这项研究 专注于特定的饮用水应用，但研究结果同样重要 对中水回用和废水MBR应用的影响。

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