Inhibition of boric acid and sodium borate on the biological activity of microorganisms in an aerobic biofilter
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Dosyalar
Tarih
2013
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor & Francis Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The aim of this work was to study the inhibition effect of boric acid and sodium borate on the treatment of boron containing synthetic wastewater by a down flow aerobic fixed bed biofilm reactor at various chemical oxygen demand (COD)/boron ratios (0.47-20.54). The inhibitory effect of boron on activated sludge was evaluated on the basis of COD removal during the experimental period. The biofilter (effective volume=2.5L) was filled with a ring of plastic material inoculated with acclimated activated sludge. The synthetic wastewater composed of glucose, urea, KH2PO4, MgSO4, Fe2SO4, ZnSO4<bold>7</bold>H2O, KCl, CaCl2, and di-sodium tetraborate decahydrate or boric acid (B=100-2000mgL(-1)). The biological treatment of boron containing wastewater resulted in a low treatment removal rate due to the reduced microbial activity as a result of toxic effects of high boron concentrations. The decrease in the COD removal rate by the presence of either boric acid or sodium borate was practically indistinguishable. It was observed from the experiments that about 90-95% of COD removal was possible at high COD/boron ratios.
Açıklama
Anahtar Kelimeler
aerobic biofilter, boron, COD, boron ratio, COD removal, inhibition, Waste-Water, Boron, Removal, Nitrification, Turkey, Sea
Kaynak
Environmental Technology
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
34
Sayı
9
