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فناوری منابع زیستی
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • the influence of additives (ca2+, al3+, and fe3+) on the interaction energy and loosely bound extracellular polymeric substances (eps) of activated sludge and their flocculation mechanisms

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    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 599
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the activated sludge (as) flocculability markedly improved after the addition of al3+ and fe3+ compared to ca2+ at a concentration of 2 meq/l. though the energy barrier decreased about 30% when ca2+ was added, the as flocculability did not improve substantially. this indicates that extended dlvo theory can explain as flocculation with al3+ and fe3+ as additives but is not appropriate for ca2+. in addition, no matter which cation was added, the as flocculability was highly correlated to the loosely bound extracellular polymeric substances (lb-eps) content. the majority of added ca2+remained in the bulk solution (about 92%), whereas almost all of the al3+ and fe3+ added was found in the pellet (about 98%). the cation’ ability to bind to the as is closely related to the energy barrier and lb-eps contents, therefore it is the core reason behind the as flocculation changes observed upon the addition of multivalent cations.

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