Biogas Production from Sewage and Sludge at WWTP

Based on these studies, the Ajman Sewerage Company (ASPCL) decided to launch a sludge-to-energy flagship project. We assisted ASPCL throughout the process of finding a contractor to build the facility. This included helping with the expression of interest, preparing the tender and contract documents, overseeing the tender process and, finally, evaluating submissions and selecting preferred contractors. The project was ultimately awarded to Six Construct, the Middle Eastern branch of the Belgium construction company BESIX.

When biogas production commenced at the facility in 2022, an exceptionally high H2S concentration was found in the biogas. As this concentration was higher than that provided for in the design, it had the potential to impact on the lifespan of materials used during the facility’s construction. Given our expertise in (anaerobic) wastewater treatment systems, we were asked to perform an additional study. A root-cause analysis – including mass balancing and a sampling campaign throughout the entire wastewater treatment plant – was performed to identify the cause of the high concentration and advise on potential solutions.