序批式陶瓷膜生物反应器中膜污垢的性能和空间分布:猪废水处理试验研究。

IF 3.3 4区 工程技术 Q2 CHEMISTRY, PHYSICAL Membranes Pub Date : 2024-06-18 DOI:10.3390/membranes14060142
Wenhui Yue, Yanlin Chen, Qianwen Sui, Libing Zheng, Tharindu Ritigala, Yuansong Wei
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引用次数: 0

摘要

陶瓷膜的超长使用寿命使其在废水处理中的广泛应用日益受到关注。对高强度猪废水进行经济有效的处理是当前的迫切需求,也是一项世界性挑战。我们开发了一种中试规模的序批式平板陶瓷膜生物反应器(ScMBR),并将其与短程生物脱氮(SBNR)工艺相结合,用于处理高强度猪废水。尽管温度在三个运行阶段从 20 °C、15 °C、10 °C逐级下降,但 ScMBR 对 COD(95.3%)、NH4+-N(98.3%)和 TN(92.7%)的去除率稳定且出色。出水的 COD 和 NH4+-N 浓度符合排放标准(GB18596-2001)。微生物群落多样性较高,假单胞菌属和科莫纳菌属在脱硝过程中占优势,亚硝基单胞菌属在亚硝化过程中占优势。该中试规模反应器的陶瓷膜组件从上到下分为六层(A、B、C、D、E、F)。顶部和底部膜组件的总过滤阻力相对较低,而中间膜组件的阻力较高。这些结果表明,膜污垢程度的空间分布是不同的,这与计算流体动力学(CFD)显示的不同曝气冲刷强度有关。结果证明,膜堵塞的机理可归结为中间组件的滤饼层形成和顶部和底部组件的孔隙堵塞,主要由蛋白质和碳水化合物组成。因此,应针对不同位置的膜组件采取不同的清洗措施。本研究对猪场废水的高效处理表明,ScMBR 系统可用于处理高强度废水。此外,膜污垢的空间分布特征有助于为进一步的大规模 MBR 应用制定清洁策略。
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The Performance and Spatial Distribution of Membrane Fouling in a Sequencing Batch Ceramic Membrane Bioreactor: A Pilot Study for Swine Wastewater Treatment.

The extensive application of ceramic membranes in wastewater treatment draws increasing attention due to their ultra-long service life. A cost-effective treatment for high-strength swine wastewater is an urgent and current need that is a worldwide challenge. A pilot-scale sequencing batch flat-sheet ceramic membrane bioreactor (ScMBR) coupled with a short-cut biological nitrogen removal (SBNR) process was developed to treat high-strength swine wastewater. The ScMBR achieved stable and excellent removal of COD (95.3%), NH4+-N (98.3%), and TN (92.7%), though temperature went down from 20 °C, to 15 °C, to 10 °C stepwise along three operational phases. The COD and NH4+-N concentrations in the effluent met with the discharge standards (GB18596-2001). Microbial community diversity was high, and the genera Pseudomonas and Comamonas were dominant in denitritation, and Nitrosomonas was dominant in nitritation. Ceramic membrane modules of this pilot-scale reactor were separated into six layers (A, B, C, D, E, F) from top to bottom. The total filtration resistance of both the top and bottom membrane modules was relatively low, and the resistance of the middle ones was high. These results indicate that the spatial distribution of the membrane fouling degree was different, related to different aeration scour intensities demonstrated by computational fluid dynamics (CFD). The results prove that the membrane fouling mechanism can be attributed to the cake layer formation of the middle modules and pore blocking of the top and bottom modules, which mainly consist of protein and carbohydrates. Therefore, different cleaning measures should be adopted for membrane modules in different positions. In this study, the efficient treatment of swine wastewater shows that the ScMBR system could be applied to high-strength wastewater. Furthermore, the spatial distribution characteristics of membrane fouling contribute to cleaning strategy formulation for further full-scale MBR applications.

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来源期刊
Membranes
Membranes Chemical Engineering-Filtration and Separation
CiteScore
6.10
自引率
16.70%
发文量
1071
审稿时长
11 weeks
期刊介绍: Membranes (ISSN 2077-0375) is an international, peer-reviewed open access journal of separation science and technology. It publishes reviews, research articles, communications and technical notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. Full experimental and/or methodical details must be provided.
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