کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
623897 1455375 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Study on the removal of biodegradable NOM from seawater using biofiltration
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Study on the removal of biodegradable NOM from seawater using biofiltration
چکیده انگلیسی

Despite the low biodegradability of seawater NOM, problems associated with biofouling are common in facilities that handle seawater. In this work, a fixed-film aerobic biofilter is proposed as an effective unit for preventing biofouling in such facilities.A packed-bed biofilter with an EBCT = 6–11 min was employed. The results demonstrated that the DOC is reduced by 6% and the BOD7 is reduced up to 15%. The LC-OCD analysis revealed that biofiltration abates the LMW neutrals and biopolymer fractions by 33 and 17%, respectively. However, the fractionation with UF membrane showed that the biofiltration process is able to degrade the more biodegradable compounds that have molecular weights that are greater than 1 kDa and compounds with molecular weights of less than 1 kDa.After biofiltration, the biological activity measured in terms of ATP removal was reduced by 60%. Finally, a test to evaluate the biofilm formation capacity of a water sample revealed reductions of ~ 94% when comparing biofiltered and non-biofiltered seawater. Therefore, a fixed-film aerobic biofiltration process could be a useful treatment for the removal of biodegradable organic matter from seawater and for improving the water quality in terms of less biofilm formation capacity.


► NOM in seawater is essentially refractory but can cause biofouling problems in seawater facilities.
► Biofouling can be effectively reduced by depleting easy biodegradable matter.
► A biofilter operated at EBCT = 6–11 min can reduce DOC and BOD up to 15%.
► Biofiltration shifts organic matter from higher than 1 kDa to lower than 1 kDa which is less biodegradable.
► A biofilter is able to prevent biological activity and thus reduce the biofilm formation capacity downstream more than 90%.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 316, 1 May 2013, Pages 8–16
نویسندگان
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