Ozone oxidation for the alleviation of membrane fouling by natural organic matter: A review

Natural organic matter removal and flux decline with PEG–TiO2-doped PVDF membranes by integration of ultrafiltration with photocatalysis

Comparative analysis of fouling characteristics of ceramic and polymeric microfiltration membranes using filtration models

Preparation and characterization of low fouling novel hybrid ultrafiltration membranes based on the blends of GO−TiO2 nanocomposite and polysulfone for humic acid removal

Membrane-based separation processes are very susceptible to flux decline because of concentration polarization and fouling problems. Despite the immense applications of low-pressure driven microfiltration (MF) and ultrafiltration (UF) membranes in various fields, fouling is considered a major negative aspect, and it renders the membrane with a reduced lifetime. The important membrane properties, hydrophilicity, charge, and morphology mainly gained by the membrane during its formation process are considered to be deciding factors in fouling. In this review, we spotlight the effects of the hydrophilicity, charge, and morphology on MF and UF fouling, the principles of the most frequently used instrumentation techniques in predicting these factors, and measures that can be taken for fouling control. The review also focuses on the UF and MF membrane modification techniques used to attain high antifouling characteristics. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42042.

https://onlinelibrary.wiley.com/doi/pdf/10.1002/app.42042

Fouling control on microfiltration/ultrafiltration membranes: effects of morphology, hydrophilicity, and charge

http://www.edcc.com.cn/en/upload/newsfile/201410/14146536462rbwvika.pdf

Comparison of humic acid rejection and flux decline during filtration with negatively charged and uncharged ultrafiltration membranes

Natural organic matter removal and flux decline with charged ultrafiltration and nanofiltration membranes

The invention relates to a method for removing natural organism and heavy metal simultaneously from water, belonging to the technical field of water treatment The method comprises the steps as follows: Step One, a hydrophilic ultrafiltration membrane is modified to a hydrophilic charged ultrafiltration membrane, wherein shape of the hydrophilic charged ultrafiltration membrane is one selected from flatbed, roll type, hollow fibre type and tube type; Step Two, the hydrophilic charged ultrafiltration membrane is placed on an ultrafiltration device and dead-end filtration or cross-flow filtration is employed to carry out ultrafiltration to water to be treated which comprises natural organism and heavy metal The method of the invention is simple in process and free of medicine addition; the method has reliable operation, compact device, and easy automatic control, which can reduce membrane pollution, prolong membrane service life and reduce process cost

Method for removing natural organism and heavy metal simultaneously from water

Much heat is released in aerobic landfills, which leads to temperature change. Quantitative prediction of temperature change with time and space is essential for the safe aerobic operation of landfill. In this article, based on the theory of porous media seepage mechanics and heat transfer, a seepage–temperature coupling model considering aeration, recirculation and degradation was established, which included internal energy change, heat conduction, convection and heat transfer. Moreover, combined with the long-time on-site monitoring temperature data from Wuhan Jinkou Landfill, the model’s reliability was preliminarily verified. Sensitivity analysis was carried out for aeration intensity, aeration temperature, recirculation intensity and recirculation temperature. Among the four factors, recirculation intensity influences the peak temperature most with a decrease of 20.11%. Compared with Borglin’s and Hao’s models, it is found that waste should not be assumed as a cell for temperature prediction. By comparing the results of Non-linear Ascent Stage model, Linear Ascent Stage model and Absent Ascent Stage model, it showed that the temperature difference of the three models decreases with the increase of operation time. In addition, the time point of peak temperature, t0, affects the temperature distribution. The above results provide a reference for predicting the spatial and temporal distribution of temperature and regulations for long-term aerobic landfill operations.

Juan Hou

Papers

Comparison of humic acid rejection and flux decline during filtration with negatively charged and uncharged ultrafiltration membranes

Natural organic matter removal and flux decline with charged ultrafiltration and nanofiltration membranes

Method for removing natural organism and heavy metal simultaneously from water

Simulation and prediction of the effect of aeration, recirculation and degradation on landfill temperature in aerobic operation