Membrane fouling (original) (raw)
تحشف أو فساد في الكيمياء تقنية الأغشية (بالإنجليزية: Fouling) هو بصفة عامة انسداد الغشاء أثناء عملية ترشيح. وتصنف أنواع التحشف بنوعين: التحشف أو الفساد العادي، التحشف البيولوجي وفيه يظهر العفن.
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| dbo:abstract | تحشف أو فساد في الكيمياء تقنية الأغشية (بالإنجليزية: Fouling) هو بصفة عامة انسداد الغشاء أثناء عملية ترشيح. وتصنف أنواع التحشف بنوعين: التحشف أو الفساد العادي، التحشف البيولوجي وفيه يظهر العفن. (ar) Unter dem englischsprachigen Begriff Fouling (deutsch ‚Verschmutzung‘, ‚Bewuchs‘) versteht man in der Membrantechnik die Verschmutzung von Filtermembranen. Man unterscheidet hierbei zwischen Fouling allgemein und Biofouling im Speziellen. (de) Membrane fouling is a process whereby a solution or a particle is deposited on a membrane surface or in membrane pores in a processes such as in a membrane bioreactor, reverse osmosis, forward osmosis, membrane distillation, ultrafiltration, microfiltration, or nanofiltration so that the membrane's performance is degraded. It is a major obstacle to the widespread use of this technology. Membrane fouling can cause severe flux decline and affect the quality of the water produced. Severe fouling may require intense chemical cleaning or membrane replacement. This increases the operating costs of a treatment plant. There are various types of foulants: colloidal (clays, flocs), biological (bacteria, fungi), organic (oils, polyelectrolytes, humics) and scaling (mineral precipitates). Fouling can be divided into reversible and irreversible fouling based on the attachment strength of particles to the membrane surface. Reversible fouling can be removed by a strong shear force or backwashing. Formation of a strong matrix of fouling layer with the solute during a continuous filtration process will result in reversible fouling being transformed into an irreversible fouling layer. Irreversible fouling is the strong attachment of particles which cannot be removed by physical cleaning. (en) |
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| rdfs:comment | تحشف أو فساد في الكيمياء تقنية الأغشية (بالإنجليزية: Fouling) هو بصفة عامة انسداد الغشاء أثناء عملية ترشيح. وتصنف أنواع التحشف بنوعين: التحشف أو الفساد العادي، التحشف البيولوجي وفيه يظهر العفن. (ar) Unter dem englischsprachigen Begriff Fouling (deutsch ‚Verschmutzung‘, ‚Bewuchs‘) versteht man in der Membrantechnik die Verschmutzung von Filtermembranen. Man unterscheidet hierbei zwischen Fouling allgemein und Biofouling im Speziellen. (de) Membrane fouling is a process whereby a solution or a particle is deposited on a membrane surface or in membrane pores in a processes such as in a membrane bioreactor, reverse osmosis, forward osmosis, membrane distillation, ultrafiltration, microfiltration, or nanofiltration so that the membrane's performance is degraded. It is a major obstacle to the widespread use of this technology. Membrane fouling can cause severe flux decline and affect the quality of the water produced. Severe fouling may require intense chemical cleaning or membrane replacement. This increases the operating costs of a treatment plant. There are various types of foulants: colloidal (clays, flocs), biological (bacteria, fungi), organic (oils, polyelectrolytes, humics) and scaling (mineral precipitates). (en) |
| rdfs:label | تحشف الغشاء (ar) Fouling (Membrantechnik) (de) Membrane fouling (en) |
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