期刊
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
卷 15, 期 4, 页码 461-468出版社
SPRINGER
DOI: 10.1007/s10163-013-0150-9
关键词
Hydrogen sulfide; Sewage sludge; Zero-valent iron; Nanoparticle; Stabilization
资金
- Science and Technology Commission of Shanghai Municipality [10DZ1200104]
- Tongji University Institute for Advanced Study [0400219152]
- National Natural Science Foundation of China [51278350]
The potential benefits of nanoscale zero-valent iron (nZVI) on sludge stabilization, either the abatement of odor or the improvement of biogas production, were investigated in this study. Two commercial-grade microscale iron powders were also utilized for comparison. Adding 0.10 wt% of nZVI in sludge during anaerobic incubation significantly reduced the concentration of H2S in biogas by 98.0 % (96.2-98.9 %), probably attributed by reactions between sulfides and the neo-formed hydrous Fe(II)/Fe(III) oxides layer at the surface of ZVI nanoparticles. Meanwhile, the percentage of P in bioavailable fractions decreased from 76.8 to 52.5 %, possibly due to the formation of vivianite [Fe-3(PO4)(2)]. Furthermore, 0.10 wt% of nZVI in anaerobic digestion for 17 days enhanced the concentration of CH4 in biogas by 5.1-13.2 % and improved the production of biogas and methane by 30.4 and 40.4 %, respectively. The amendment of iron nanoparticles during anaerobic digestion can not only effectively reduce H2S in biogas, but also potentially boost methane production significantly.
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