کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4484125 1316910 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhancing the formation and shear resistance of nitrifying biofilms on membranes by surface modification
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Enhancing the formation and shear resistance of nitrifying biofilms on membranes by surface modification
چکیده انگلیسی

Polypropylene (PP) membranes and polyethylene (PE) surfaces were modified to enhance formation and shear resistance of nitrifying biofilms for wastewater treatment applications. A combination of plasma polymerization and wet chemistry was employed to ultimately introduce poly(ethyleneglycol) (PEG) chains with two different functional groups (–PEG–NH2 and –PEG–CH3). Biofilm growth experiments using a mixed nitrifying bacterial culture revealed that the specific combination of PEG chains with amino groups resulted in most biofilm formation on both PP and PE samples. Detachment experiments showed similar trends: biofilms on –PEG–NH2 modified surfaces were much stronger compared to the other modifications and the unmodified reference surfaces. Electrostatic interactions between the protonated amino group and negatively charged bacteria as well as PEG chain density which can affect the surface structure might be possible explanations of the superiority of the –PEG–NH2 modification. The success of the–PEG–NH2 modification was independent of the original surface and might, therefore, be used in wastewater treatment bioreactors to improve reactor performance by making biofilm formation more stable and predictable.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Research - Volume 43, Issue 14, August 2009, Pages 3469–3478
نویسندگان
, , , , ,