Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea.
Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea.
Chemosphere. 2020 Nov;259:127328. doi: 10.1016/j.chemosphere.2020.127328. Epub 2020 Jun 17.
This study investigates five different fouling models and contributing factors in membrane-filtration blocking mechanisms in a constant-pressure mode. A polyvinylidene fluoride membrane was used to study the fouling effects of a complex mixture of foulants (a latex-bed suspension, soybean oil, and inorganics) on pristine and chemically cleaned membranes in the presence of humic acid. A significance ratio in linear regression results (p-value) was used to assess the contribution of fouling mechanism in each model. The results indicate that Hermia and Bowen's models correspond closely with the experiment results and confirms that complete blocking is dominant fouling model. We also verify that each developed model is dependent on its experimental conditions. Moreover, the role of complex mixtures, including inorganic foulants, in the fouling process needs to be modified as modified for ceramic membranes and natural organic matter removal in the Wiesner and Kilduff models, respectively.
本研究调查了五种不同的污垢模型以及恒压模式下膜过滤堵塞机制中的促成因素。使用聚偏二氟乙烯膜研究了在腐殖酸存在下，原始和化学清洗后的膜上由复杂混合物污染物（乳胶床悬浮液、大豆油和无机物）引起的污垢效应。线性回归结果中的显著比（p 值）用于评估每个模型中污垢机制的贡献。结果表明，Hermia 和 Bowen 的模型与实验结果非常吻合，证实完全堵塞是主要的污垢模型。我们还验证了每个开发的模型都依赖于其实验条件。此外，需要对包括无机污染物在内的复杂混合物在污垢形成过程中的作用进行修正，分别针对陶瓷膜和 Wiesner 和 Kilduff 模型中的天然有机物去除进行修正。
