期刊
BIORESOURCE TECHNOLOGY
卷 275, 期 -, 页码 352-359出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.12.086
关键词
Sewage sludge; Anaerobic digestion; Nanotechnology; Zero valent iron nanoparticles; Biogas production
资金
- Consejo Nacional de Ciencia y Tecnologia (CONACyT) [429358]
This work studied the effects on the anaerobic digestion of sewage sludge by zero valent iron nanoparticles (NZVI) dosage. Biochemical methane potential tests were carried out with 5-9 mg/g(VS) (99.7%, 40-60 nm). The biogas yield increased from 132 (control) to 310 mL/g(VS) with 9 mg/g(VS). The methane content increased from 63.2% (control) to 77.6% with NZVI, which corresponded to a maximum yield of 238 mLCH(4)/g(VS) with 9 mg/g(VS). The maximum VS reduction was 19.6%. The highest INT-ETS activity (20.1-37.1 mu gINT(red)/g(VS).h) corresponding to the maximum values of sCOD was reached within the first days. NZVI decreased the ORP to -300 mV and increased the VFA's concentration (+ 2000 mg/L). The ORP-VFA-pH analysis showed that NZVI promoted the acidogenesis-acetogenesis without acidification. That is, NZVI was effective in intensifying the performance and stability of the process.
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