Lead inhibition on urea hydrolyzing microorganisms under batch conditions
Yükleniyor...
Dosyalar
Tarih
2010
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Diagnosis Press Ltd.
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Lead Pb(II), inhibition of microbial calcium precipitation by ureolytic microorganisms was carried out with a glucose containing mineral medium under batch conditions over an incubation period of 120 hours Substrate removal rate fitted a zero order up to 70(th) hour and first order kinetic after that time for all samples containing lead concentrations of 0-64 mg/L The increase of Pb(II) concentrations from 0 to 64 mg/L reduced constant of substrate degradation rate from 10 26 to 4 04 mg glucose/L h and from 0 027 to 0 005 l/h for zero (k(0)) and first order kinetic constant (k(1)) respectively The Pb(11) at concentration higher than 16 mg/L mainly inhibited both substrate removal and nitrification process Although nitrification was inhibited at higher concentrations of lead its inhibition caused precipitation of calcium due to high pH and alkalinity levels in the samples As a result that a modified Monod inhibition model was applied to BOD data BOD removal rate inhibited non-competitively The non-competitive inhibition constants (K(1)) were 104 mg/L for K(s), and 373 mg/L for R(max) at Pb(11) concentration of 64 mg/L
Açıklama
Anahtar Kelimeler
Inhibition, Lead, Non-Competitive, Ureolytic Microbial Activity, Calcium Precipitation
Kaynak
Biotechnology & Biotechnological Equipment
WoS Q Değeri
N/A
Scopus Q Değeri
Q3
Cilt
24
Sayı
4
