期刊
CHEMICAL ENGINEERING JOURNAL
卷 393, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.124594
关键词
Methane bioconversion; Acetate; Denitrification; Nitrate removal; Membrane biofilm reactor; Groundwater remediation
资金
- Australian Research Council (ARC) through the project Australian Laureate Fellowship [FL170100086]
- Australian Research Council Future Fellowship [FT170100196]
- International Postgraduate Research Scholarship (IPRS)
- University of Queensland Centennial Scholarship (UQCent)
- Natural Science Foundation of China [41601243]
Nitrate (NO3-) removal from groundwater is of great importance since it has posed a major risk to human health. Although methane-based denitrification processes have been developed, the practical application of methane as a carbon source for denitrification is constrained by either a long start-up time or a relatively low nitrate removal rate. This study investigated nitrate removal capacity by using a methane-based membrane biofilm reactor (MBfR) feeding with synthetic groundwater. A high nitrate removal rate of 706 mg-N L-1 d(-1) was achieved, which is by far the highest rate reported for methane-based denitrification reactors. Short-chain fatty acids (SCFAs) were detected as products of methane bioconversion, with concentrations of acetic and propionic acid up to 168.8 mg L-1 and 50.2 mg L-1, respectively. Long-term operation and batch test results revealed that the SCFAs generated from methane bioconversion were in situ utilized for supporting nitrate removal as carbon and electron sources, thus leading to a practically useful removal rate. The findings suggest that it is promising to apply the methane-based MBfR to remove nitrate from nitrate contaminated groundwater.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据