Experimental and Modelling Investigation on the Impact of Engineered Biochars on the Abiotic and Biotic Removal of Hydrogen Sulfide in Sewer Systems

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Several problems are associated with the emission of hydrogen sulfide (H2S) from wastewaters including its toxicity, causing corrosion, and the release of odors. Different strategies have been applied for the reduction or removal of hydrogen sulfides, such as the use of air or oxygen, nitrates, metal salts (iron salt), and biological agents for the oxidation of sulfides. Since the costs associated with the current solutions are extremely high, the development of more efficient and economical methods is critical for small to large municipalities. The project will investigate the abiotic (physical-chemical) and biotic (microbial) chemical transformations related to iron-sulfur-phosphorus (Fe-S-P) interactions in sewer systems using laboratory-scale pilot plants in combination with novel sustainable materials derived from the combination of residual biomass and metal-rich wastes. Techno-economic studies and scale-up will be investigated and a larger pilot-scale testing unit will be implemented at the Middlesex Centre wastewater treatment plant to perform a real-world case study. One of the major benefits of the research component and pilot plant which will be implemented at the local municipality of Middlesex Center (MMC) is that its success will lead to the potential permanent implementation in that community, serving as a showcase that could be implemented elsewhere.