کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
680739 | 1459990 | 2014 | 7 صفحه PDF | دانلود رایگان |

• Haloalkaliphilic microorganisms were used to reduce sulfate and nitrate.
• Sulfide concentration reached up to 703 mg/l.
• There was no sulfide inhibition to haloalkaliphilic microorganisms.
• Bacterial community of haloalkaliphilic bioreactor was studied.
Effects of NO3-/SO42- ratio on denitrification and sulfate removal efficiency were investigated in model experiments applying haloalkaliphilic bioreactor. The reduction of both substrates performed well at different NO3-/SO42- ratios ranging from 17.6 to l.5. The removal rates of nitrate and sulfate were 6 and 1.39 kg m−3 d−1, respectively, at NO3-/SO42- ratio 3.0, while sulfide concentration reached up to 703 g m−3. The major sulfate-reducing and denitrifying bacteria were Desulfonatronovibrio sp. and Halomonas campisalis , respectively. Decrease in NO3-/SO42- ratio led to obvious changes in bacterial community. Although the sulfate reducers became dominant, the population of denitrifying ones also increased as it was demonstrated by analysis of PCR-amplified 16S rDNA fragments, which suggested that SRB and DB coexisted well in bioreactor.
Journal: Bioresource Technology - Volume 153, February 2014, Pages 216–222