Yazar "Isik, M" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim Yok
    Öğe
    Biological treatment of acid dyeing wastewater using a sequential anaerobic/aerobic reactor system
    (ELSEVIER SCIENCE INC, 2006) Isik, M; Sponza, DT
    The treatment of the wastewater taken from a wool dyeing processing in a wool manufacturing plant was investigated using an anaerobic/aerobic sequential system. The process units consisted of an anaerobic UASB reactor and an aerobic CSTR reactor. Glucose, alkalinity and azo dyes were added to the raw acid dyeing wastewater in order to simulate the dye industry wastewater since the raw wastewater contained low levels of carbon, NaHCO3 and color through anaerobic/aerobic sequential treatment. The UASB reactor gave COD and color removals of 51-84% and 81-96%, respectively, at a HRT of 17 h. The COD and color removal efficiencies of the UASB/CSTR sequential reactor system were 97-83% and 87-80%, respectively, at a hydraulic retention time (HRTs) of 3.3 days. The aromatic amines (TAA) formed in the anaerobic stage were effectively removed in the aerobic stage. (c) 2006 Elsevier Inc. All rights reserved.
  • Küçük Resim Yok
    Öğe
    Efficiency of simulated textile wastewater decolorization process based on the methanogenic activity of upflow anaerobic sludge blanket reactor in salt inhibition condition
    (ELSEVIER SCIENCE INC, 2004) Isik, M
    The performance of a plot scale upflow anaerobic sludge blanket reactor treating simulated cotton textile wastewater was examined to understand the effect of salt concentration in the color and COD removal efficiencies. The salt (NaCl) concentration increased from 0 to 128 g l(-1) while HRT. and the organic loadings were kept constant giving a HRT of 20 h and a 3.86 of volumetric organic loading rates. COD removal efficiencies decreased up to 18 from 80% as methanogenic bacteria inhibited by increasing salt concentration in the feed. Hi-h volatile fatty acid concentrations, low pH and high volatile fatty acids/bicarbonate alkalinity ratios in the effluent of reactor show the inhibition of methanogenic bacteria. A salt concentration of 128 g l(-1) cause to reduce methane percentage and methane production rates to 30% and 180 ml/day from 70% and 2260 ml/day. Although COD removal efficiencies decreased, However, the color removals was not effected (decolorization efficiency = 100%) with increasing NaCl concentration as high as 128 g l(-1) in the feed. (C) 2004 Elsevier Inc. All rights reserved.