SGHGEMS

SULFIDE AND GREENHOUSE GAS EMISIONS FROM MEDITERRANEAN SEWERS

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 Obiettivo del progetto (Objective)

'Production and build-up of sulfide and methane in wastewater collections systems causes several detrimental effects. Sulfide accumulation in sewers causes: i) odour nuisance in sewer surrounding areas, ii) health hazards due to its toxicity, and iii) corrosion of pipes and inlet structures of sewage treatment plants. On the other hand methane is a greenhouse gas with significantly contributing to global warming. Despite these significant impacts, sewer-produced sulfide and methane are yet to be considered in the management of Mediterranean Urban Water Systems. Additionally, detrimental emissions are expected to increase in the Mediterranean region due to predicted climate change and water scarcity scenarios. The current research project aims to study and mitigate the production of sulfide and greenhouse gas emissions from sewers exposed to Mediterranean climate conditions. The project methodology combines extensive experimental work on real sewers with advanced mathematical modelling to provide effective applicable control measures. The objective is to carry out the first quantification of sulfide and methane from Mediterranean sewers and also to create advanced management tools that include control of sewer emissions for optimal operation of urban water systems.'

Introduzione (Teaser)

Researchers are investigating promising strategies to mitigate the detrimental production and build-up of sulphide and methane in wastewater collection systems.

Descrizione progetto (Article)

Sulphide accumulation in sewers causes bad odour, health hazards, and the corrosion of pipes and inlet structures. Sewers are also a source of methane, a greenhouse gas (GHG) that contributes significantly to global warming. These gas emissions are expected to increase in the Mediterranean due to climate change and predicted water scarcities.

The EU-funded 'Sulfide and greenhouse gas emissions from Mediterranean sewers' (SGHGEMS) project aims to resolve these issues. The project combines extensive experimental work on real sewers, with advanced mathematical modelling to provide effective control measures. The objective is to quantify sulphide and methane production from Mediterranean sewers, and to create advanced management tools.

The first two years of the project were dedicated to setting up the monitoring equipment and to performing the first round of sampling campaigns. These efforts have quantified the gases produced in the Spanish l'Escala urban wastewater system, and the results reflect both cold and warm weather conditions.

Relevant findings were used to simulate the behaviour of the monitored sewer system. These simulations have consequently allowed for the optimisation of nitrate concentrations necessary to control sulphide in this system.

Ongoing SGHGEMS research will aid in tackling the effects of sulphide and methane in Mediterranean water systems, resulting in healthier sewers and a healthier environment.