Microfiltration and Nano filtration membranes for drinking water treatment

المؤلف

Abu Zubaydah, Usamah

المصدر

المؤتمر الهندسي الدولي الثاني للإعمار و التنمية الجامعة الإسلامية-غزة، 3-4 سبتمبر 2007

الناشر

الجامعة الإسلامية كلية الهندسة

تاريخ النشر

2007-09-30

دولة النشر

فلسطين (قطاع غزة)

عدد الصفحات

13

التخصصات الرئيسية

العلوم الهندسية والتكنولوجية (متداخلة التخصصات)
علوم الأرض و المياه و البيئة

الملخص الإنجليزي

Substances in the drinking water sources can be presented in the three main forms : suspended, colloidal and dissolved.

The suspended matter which is commonly characterized by turbidity can be removed by most conventional treatment processes, the most familiar of which are chemically assisted coagulation followed by filtration or clarification and filtration.

The coagulant dosage in this case is typically comparable to the turbidity level in the source.

The occurrence of Cryptosporidium and Giardia cysts and oocysts and other parasites in drinking water sources has uncovered a new field of application for membranes in the drinking water sector.

The inefficiency of conventional filtration plants to filter and disinfect these pathogens from the potable water has forced engineers to look into new technologies.

Membranes are the natural answer to solve their problem since these are absolute barriers to parasites which size exceed the membrane’s pore size.

Conventional treatment processes are also often not effective when color and Total Organic Carbon (TOC) are present in higher levels in the feed water.

As the colloidal and suspended portions of these components are relatively high, they are not readily removed by settling and gravity filtration.

Finally, high levels of iron and manganese in well waters have been difficult to treat with the conventional green sand approach and again, these have started to be good candidate plants for membrane technologies.

Microfiltration and nanofiltration membranes are becoming more and more used in the drinking water field.

For some applications, MF membranes are now seen as a proven technology.

This includes Cryptosporidium and Giardia cysts and oocysts parasites removal and turbidity removal with microfiltration and color and brackish water treatment with nanofiltration.

Advantages related to the use of membranes in drinking water treatment are : low energy requirements, absolute barrier effect to microorganisms, lower chlorine requirement for disinfection, low chemical (if any) use, smaller footprint.

The type of membrane used also influences some specific advantages .

This paper will present typical applications of both types of membranes in the drinking water field.

Subjects discussed herein are : • Removal of turbidity and parasites by direct microfiltration-disinfection MF • Removal of Fe and Mn by combining oxidation with microfiltration • Removal of color and TOC (total organic carbon) by combining enhanced coagulation with microfiltration • Removal of color and TOC by nanofiltration

نوع البيانات

أوراق مؤتمرات

رقم السجل

BIM-775969

• APA
• MLA
• AMA