文献类型：期刊文献

英文题名：The key factor in High Pressure Hydrogenotrophic Denitrification: Hydrogen partial pressure

作者：Zhou, Jianmin[1];Ding, Lei[1];Shi, Mu[1];Lindeboom, Ralph E. F.[2];Cui, Changzheng[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Ind Wastewater Detoxicat & Reso, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]Delft Univ Technol, Dept Water Management, Sanit Engn Sect, NL-2628 CN Delft, Netherlands

年份：2022

卷号：49

外文期刊名：JOURNAL OF WATER PROCESS ENGINEERING

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000873948700005)】；

基金：This work was supported by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry (B100 -C-1503) , and the National Natural Science Foundation of China (51008125) .

语种：英文

外文关键词：Hydrogen; High pressure; Specific denitrification rate; Nitrite accumulation; Low temperature

摘要：In the envisaged hydrogen economy, H2 could be an interesting alternative electron donor for the denitrification of drinking water or wastewater. The main obstacle to engineering the hydrogenotrophic denitrification process is the low solubility of H2 in water under atmospheric pressure, which limits denitrification rate and nitrogen removal efficiency. In this paper, we demonstrated a novel configuration of hydrogenotrophic denitrification, namely High Pressure Hydrogenotrophic Denitrification (HPHD). Elevated H2 partial pressure (pH2) was employed to increase dissolved H2 concentration and concomitantly enhance denitrification rate. Our results showed that the specific denitrification rate increased from 9.6 mg N/(gVSS center dot h) at 0.5 bars to 51.0 mg N/(gVSS center dot h) at 9 bars in HPHD. The denitrification effect could be retained with elevated pH2 at a low temperature. The specific denitrification rate at 3 bars and 15 degrees C was 20.5 mg N/(gVSS center dot h), approximately 1.5 times that at 1 bar and 30 degrees C, which was quite beneficial for hydrogenotrophic denitrification under cold conditions. Different from nitrite reduction, less impact was observed on nitrate reduction by low temperature, which explained high nitrite accumulation in HPHD at 15 degrees C. Overall, our investigations shed light on the role of pH2 in the promising so-lution for nitrogen removal in HPHD.