Non-destructive In Situ Fouling Monitoring in Membrane Processes
0
Citation
5
Reference
10
Related Paper
Keywords:
Membrane Fouling
Analysis technology for membrane fouling, influental factors on membrane fouling, methods of preventing membrane fouling and its cleaning methods as well as cleaning agents are reviewed in this paper. The definition of membrane fouling and its classification and the recent development are also introduced.
Membrane Fouling
Cite
Citations (3)
Membrane Fouling
Biofouling
Cite
Citations (10)
Membrane Fouling
Ultrafiltration (renal)
Cite
Citations (3)
Membrane Fouling
Membrane bioreactor
Seasonality
Cite
Citations (79)
Membrane Fouling
Filtration (mathematics)
Cite
Citations (68)
The discharge of massive amounts of oily wastewater has become one of the major concerns among the scientific community. Membrane filtration has been one of the most used methods of treating oily wastewater due to its stability, convenience handling, and durability. However, the continuous occurrence of membrane fouling aggravates the membrane's performance efficiency. Membrane fouling can be defined as the accumulation of various materials in the pores or surface of the membrane that affect the permeate's quantity and quality. Many aspects of fouling have been reviewed, but recent methods for fouling reduction in oily wastewater have not been explored and discussed sufficiently. This review highlights the mitigation strategies to reduce membrane fouling from oily wastewater. We first review the membrane technology principle for oily wastewater treatment, followed by a discussion on different fouling mechanisms of inorganic fouling, organic fouling, biological fouling, and colloidal fouling for better understanding and prevention of membrane fouling. Recent mitigation strategies to reduce fouling caused by oily wastewater treatment are also discussed.
Membrane Fouling
Cite
Citations (46)
Fouling is a phenomenon that occurs in all membrane processes. It is a complex problem, which limits the full operation of this technology. Fouling in pressure-driven membranes (PDMs) has been studied extensively, and the occurrence is well understood in that methods of mitigation have been proposed; however, limitations still occur for their full implementation. The use of osmotically driven membranes (ODMs) for water treatment is an emerging technology, which has shown some advantages such as low hydraulic pressure operation, high solute rejection and high recovery over PDMs. However, like in PDMs, fouling still presents a challenge. This chapter is aimed at evaluating the impact of fouling on the ODM performance, exploring the factors and mechanisms governing the fouling behaviour, developing approaches for mitigating fouling, elucidating the effect of membrane fouling and providing mitigation strategies as well as the causes of fouling in ODMs.
Membrane Fouling
Cite
Citations (7)
Membrane fouling is a serious concern in municipal wastewater treatment using nanofiltration (NF). The variation of NF membrane fouling at different operational durations were monitored and evaluated to understand the evolution of fouling mechanism in the present study. Six representative cleaning methods were picked for tests to deconstruct the structure and composition of the fouling layers on membrane surface. Characteristics of membrane surface morphology and foulants were analysed using advanced methods to investigate the evolution of membrane fouling. Both the composition and concentration of foulants on membrane surface showed significant variations with time during the whole operational duration, indicating the necessity of clear and precise understanding for the evolution of membrane fouling to expound its mechanism in depth. The fouling layers were mainly composed of hydrophobic organics while most inorganic salts were deposited on the surface or embedded into the upper layer of the cake in a short duration. However, after a long duration, the cake layer became thinner with much higher proportion of hydrophilic organics. Meanwhile, more inorganic foulants penetrated deep into the cake layer or even directly absorbed on the membrane surface, which resulted in more complicated fouling scenarios. Moreover, more efficient and effective targeted cleaning strategies could be further established based on the fouling mechanism identified.
Nanofiltration
Membrane Fouling
Biofouling
Membrane Technology
Cite
Citations (5)
Membrane Fouling
Membrane bioreactor
Cite
Citations (3)
Membrane Fouling
Filtration (mathematics)
Biofouling
Cleaning agent
Membrane Technology
Cite
Citations (26)