NITROGEN REMOVAL FROM ANAEROBICALLY DIGESTED SWINE WASTEWATER THROUGH COMBINED AMMONIA STRIPPING AND MEMBRANE BIOREACTOR PROCESSES

文献类型： 外文期刊

第一作者： Sui, Q.

作者： Sui, Q.;Zhu, Z.;Dong, H.;Wang, Y.

作者机构：

关键词： Ammonia stripping;Membrane bioreactor;Nitrogen removal;Oxidation-reduction potential;Shortcut nitrification and denitrification

期刊名称：TRANSACTIONS OF THE ASABE （ 影响因子：1.188； 五年影响因子：1.695 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Anaerobically digested swine wastewater has high concentrations of total ammoniacal nitrogen (TAN) (approximately 1,000 mg N L-1) and a low chemical oxygen demand (COD) to total nitrogen (DT) (COD/TN) ratio of <3.0, making it difficult to achieve a high TN removal rate using traditional biological nitrogen removal processes. The purpose of this study was to investigate the effectiveness of combining ammonia stripping (AS) and membrane bioreactor (MBR) processes to remove nitrogen from anaerobically digested swine wastewater. The coupling parameters that would lead to a high TN removal rate and cost effectiveness were also explored. Ammonia stripping was conducted at two pH levels of 10.0-10.5 (High-pH) and 9.0-9.5 (Low-pH). The MBR had the configuration of anoxic biofilm and aerobic MBR, and it was operated at two influent COD/TN ratios of 6.0-8.0 and 5.0-6.0 coupled with two TAN sludge loading rates in the oxic zone of 0.04-0.05 and 0.12-0.16 kg N kg(-1) mixed liquid suspended solid (MLSS) d(-1). Total nitrogen removal rate for the High-pH and Low-pH AS was 83% and 65%, respectively. In the MBR at a dissolved oxygen (DO) level of 6.12 +/- 0.69 mg L-1, increasing the TAN sludge loading rate from 0.04 to 0.16 kg N kg(-1) MISS d(-1) led to an increase in free ammonia from 0 to 4-9 mg L-1 and an increase in nitrite accumulation rate (NAR) from 0% to 71%. At a TAN sludge loading rate in the oxic zone of 0.12 kg N kg(-1) MISS d(-1) and NAR of 53%, the TN removal rate reached 82% in the MBR through shortcut nitrification and denitrification (SND). The influent biochemical oxygen demand (BOD5) to TN (BOD5/TN) ratio was 1.41, COD/TN was 5.41, and the oxidation-reduction potential (ORP) of the denitrification zone was as low as -300 to -400 mV. Among the experimental conditions examined, the combined Low-pH AS+SND process provided the highest TN removal rate of 94% with the least cost and HRT.

分类号： S

  • 相关文献

[1]Effect of ammonium nitrogen concentration on the ammonia-oxidizing bacteria community in a membrane bioreactor for the treatment of anaerobically digested swine wastewater. Sui, Qianwen,Liu, Chong,Dong, Hongmin,Zhu, Zhiping,Sui, Qianwen,Liu, Chong,Dong, Hongmin,Zhu, Zhiping.

[2]Exploration of three heterotrophic nitrifying strains from a tilapia pond for their characteristics of inorganic nitrogen use and application in aquaculture water. Fan, Limin,Chen, Jiazhang,Liu, Qi,Meng, Shunlong,Xu, Pao,Fan, Limin,Chen, Jiazhang,Liu, Qi,Wu, Wei,Meng, Shunlong,Song, Chao,Qu, Jianhong,Xu, Pao.

[3]Floating ryegrass mat for the treatment of low-pollution wastewater. Duan, Jingjing,He, Shiying,Feng, Yanfang,Yu, Yingliang,Xue, Lihong,Yang, Linzhang,Duan, Jingjing,He, Shiying,Feng, Yanfang,Yu, Yingliang,Xue, Lihong,Yang, Linzhang.

作者其他论文 更多>>

微信小程序