Journal
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
Volume 167, Issue -, Pages 390-397Publisher
ELSEVIER
DOI: 10.1016/j.psep.2022.09.015
Keywords
Naproxen; Excess sludge; Dark fermentation; Biohydrogen production; Enzymatic activity
Categories
Funding
- Natural Science Foundation of Shandong Province [ZR2020ME225]
- Qingdao West Coast New Area Science and Technology Project Benefiting the People [2021-99]
- Hebei social science development research project [202102011396]
- National Natural Science Foundation of China (NSFC) [51908305]
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration [SHUES2022A09]
Ask authors/readers for more resources
This study investigated the impact of the emerging pollutant naproxen (NPX) on hydrogen production from excess sludge dark fermentation. The results showed that NPX had an inhibitory effect on biohydrogen production, especially at high doses. NPX could be partially removed during the fermentation process, but it also promoted the release of dissolved chemical oxygen demand (COD) and increased soluble organic matter. NPX significantly suppressed the acidification process and key enzyme activity, leading to a decline in biohydrogen production.
In order to explore the effect of emerging pollutant naproxen (NPX) on the hydrogen production from excess sludge(ES) dark fermentation, six groups of laboratory-scale sequencing batch anaerobic reactor were constructed. The biohydrogen production efficiency, the transformation characteristics of organic matter and the activities of key enzymes were analyzed to explore the effect of NPX on the ES dark fermentation hydrogen production. The effect of NPX on ES dark fermentation is closely related to its exposure content, that is, low-dose NPX had no obvious effect on biohydrogen production, while high-dose NPX inhibited biohydrogen production. 12.0 mg NPX/Kg reduced biohydrogen production to 14.6 mL/g, about 12.5 % of the control. NPX can be partially removed in the process of ES dark fermentation, and the removal efficiency was about 23.3 similar to 42.5 %. NPX promoted the release of dissolved chemical oxygen demand (COD) and increased the soluble organic matter in the fermentation broth. However, NPX significantly suppressed the acidification process, which was also the key reason for the decline of biohydrogen production. Enzyme activity analysis also verified the inhibition of NPX on key enzymes involved in volatile fatty acids (VFA) and biohydrogen production. The results of this study enriched the influence behavior of NPX in the environment, and provided a certain theoretical basis for the ES resource utilization.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available