کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
21696 | 43235 | 2009 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Partial nitritation treatment of underground brine waste with high ammonium and salt content Partial nitritation treatment of underground brine waste with high ammonium and salt content](/preview/png/21696.png)
Underground brine waste containing high concentrations of ammonium and with a salinity of 3% is usually generated during the production of methane gas and iodine in the gas field of Chiba Prefecture, Japan. In this study, one swim-bed reactor, packed with a novel acrylic fiber biomass carrier (Biofringe), was applied to the partial nitritation treatment of this kind of underground brine waste. A stable nitrite production rate of 1.6 kg NO2-N m− 3 d− 1 was obtained under a nitrogen loading rate of 3.0 kg-N m− 3 d− 1, at a pH of 7.5 and a temperature of 25 °C. Nitrate production was negligible and the effluent NO2-N/NOx-N ratio was above 98% due to the successful inhibition of nitrite-oxidizing bacterial activity. Free ammonia was considered to be the main factor for inhibiting the activity of nitrite-oxidizing bacteria. A microbial community shift was demonstrated by 16S rRNA analysis, and it was shown that the ammonium-oxidizing bacteria became the predominant species after successful nitrite accumulation was observed.
Journal: Journal of Bioscience and Bioengineering - Volume 108, Issue 4, October 2009, Pages 330–335