The Involvement of Nanoscale Zero Valent Iron during the Anaerobic Digestion of Sludge

Relebohile Mokete, Osama Eljamal

Research output: Contribution to journalArticlepeer-review


Increased production of Waste Activated Sludge (WAS) calls for its proper treatment and this can be achieved by biogas production. The aim of this research was to investigate the impact of 1.5g/L NZVI on the generation of bio-methane through the Anaerobic Digestion (AD) process. The results showed that sludge with NZVI (Sg/NZVI) improved the biogas production due to its electron transfer capability. The pH decreased overtime due to the production of Volatile Fatty Acids (VFA) during the AD process, however, the pH of the control decreased more than that of Sg/NVZI because the H+ was consumed during iron corrosion thus resulting in a favorable pH for the methanogens. But with time, the accumulation of VFA and ammonia resulted in the decreased production of biogas.
Original languageEnglish
Pages (from-to)186-191
Number of pages6
JournalProceedings of International Exchange and Innovation Conference on Engineering & Sciences (IEICES)
Issue number6
Publication statusPublished - Oct 22 2020

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