A two-stage UASB reactor was employed to remove sulfate from acrylic fiber manufacturing wastewater. Mesophilic operation (35 +/- 0.5 degree C) was performed with hydraulic retention time (HRT) varied between 28 and 40 hr. Mixed liquor suspended solids (MLSS) in the reactor was maintained about 8000 mg/L. The results indicated that sulfate removal was enhanced with increasing the ratio of COD/S...

Here, we describe a three-step nested-PCR-denaturing gradient gel electrophoresis (DGGE) strategy to detect sulfate-reducing bacteria (SRB) in complex microbial communities from industrial bioreactors. In the first step, the nearly complete 16S rRNA gene was amplified using bacterial primers. Subsequently, this product was used as a template in a second PCR with group-specific SRB primers. A th...

Anaerobic biotechnology using sulfate-reducing bacteria (SRB) is a promising alternative for reducing long-term stockpiling of phosphogypsum (PG), an acidic (pH ~3) by-product of the phosphate fertilizer industries containing high amounts of sulfate. The main objective of this study was to evaluate, for the first time, the diversity and ability of anaerobic marine microorganisms to convert sulf...

Abstract The potential for crevice corrosion of UNS30400 stainless steel in the presence sulfate-reducing bacteria (SRB) was studied different media. Immersion studies found to occur test media supplemented with high chloride levels and SRB present gaps ~3 μm. Electrochemical measurements showed susceptibility this particular medium, demonstrated by a negative shift open circuit potential, incr...

The influence of sulfate-reducing bacteria (SRB) on the corrosion behaviors X80 pipeline steel was investigated in a soil environment by electrochemical techniques and surface analysis. It found that SRB grew well acidic further attached to coupon surface, resulting microbiologically influenced (MIC) steel. process significantly affected biofilm surface. Steel inhibited highly bioactive at earl...

The effect of a sulfate reducing bacteria immobilized in polyvinyl alcohol (PVA) on simultaneous sulfate reduction and copper removal was investigated. Batch experiments were designed using central composite design (CCD) with two parameters, i.e. the copper concentration (10-100mg/L), and the quantity of immobilized SRB in culture solution (19-235 mg of VSS/L). Response surface methodology (RSM...

Arctic regions may be particularly sensitive to climate warming and, consequently, rates of carbon mineralization in warming marine sediment may also be affected. Using long-term (24 months) incubation experiments at 0°C, 10°C and 20°C, the temperature response of metabolic activity and community composition of sulfate-reducing bacteria were studied in the permanently cold sediment of north-wes...

In this paper, the corrosion residual strength of the AZ91D magnesium alloy in the presence of sulfate-reducing bacteria is studied. In the experiments, the chemical composition of corrosion film was analyzed by a scanning electron microscope with energy dispersive X-ray spectroscopy. In addition, a series of instruments, such as scanning electronic microscope, pH-meter and an AG-10TA materials...

E. A. Ghazy, M.G. Mahmoud, M. S. Asker, M. N. Mahmoud, M. M. Abo Elsoud and M. E. Abdel Sami Microbial Biotechnology Department, National Research center, Dokki, Cairo, Egypt [email protected] Abstract: Sulfate-reducing bacteria (SRB) represent a class of anaerobic microorganisms that conduct dissimulatory sulfate reduction to obtain energy. The present study aimed to detect and control SRB...