Project name Integrated model for optimization of sewage sludge treatment choices, based on a low-carbon energy planning strategy
Objective Objective 2.2
Priority Low carbon cities and regions
Aim Sewage sludges represent an issue of great concern for the critical aspects linked to their management.
Some examples are:
- Huge amount of sludge produced (first/second source of urban waste);
- Lack of appropriate sludge treatment plants in the nearby area and consequent long distance transport (also cross-border);
- Complex and long procedures to authorize new sludge treatment plants;
- Scarce social acceptability of sludge treatment plants;
- Wastewater characteristics at inlet and treatments stages not suitable for a subsequent land application of the resulting sludge;
- Restrictive and variable regulations for reuse/recovery/disposal;
- Variability of market condition and treatment price.
Therefore the project aims at:
1) helping each actor (policy makers, institutions, water utility managers, sludge producers and users, etc) involved in the decision process about the best sludge treatment and disposal routes to pursue low carbon and energy recovery strategies.
2) evaluating all the different treatment alternatives such as anaerobic digestion, with or without pre-thermal hydrolysis, composting, hydrotermal carbonization, energy recovery (combustion, gasification, pyrolysis, hydrothermal hydrolysis, carbonation, cement factory use incorporating ashes in the cement matrix), low temperature heat drying combined with high efficiency heat and power system;
3) identifying solutions able to harness the renewable energy potential still present in the sludges as biologi-cal carbon content with a fuel value;
4) considering sludges as an important natural source for nutrients (phosphorus and nitrogen) that could be recovered;
5) promoting the implementation of the best "sewage sludge management strategy” for each specific context on the basis of economic sustainability (LCC), climate-altering emissions as carbon footprint of the whole system (dewatering, drying, transport, chemical consumption , etc..), environmental protection, market condition and legislative framework.
Results The main project results will be:
1) providing a framework of sewage sludge produced in the different examined situations in Central Europe, marking the actual technology maps for sludge handling and the consistency with low carbon energy objectives;
2) developing a strategic map for individuating the best sludge treatment combinations to cover the founded gap with low carbon footprint and energy recovery goals;
3) SWOT analyses for various sludge treatment strategies even focusing on the opportunity to ap-ply CHP Systems combined to low temperature heat drying;
4) Implementing a standardized tool to evaluate the economic and environmental impact of each sludge treatment alternative, alone and in combination, useful for any platform needs to be evaluated.
Cost Around 2,5 million euro
Duration Max. 36 months
Partners involved The project consortium is still in formation and we are currently looking for partners.
Partners already involved are:
-Etra S.p.a. (Italy) and Veritas: multi-utilities of Veneto region,
-VIK-Split (Croatia): water utility of Spalato municipality.
Partners requested We are looking for universities/research centers expert in sewage sludge treatment / energy recovering and environmental impact assessment, other water utilities not from Italy, organizations responsible for territorial regulation and policies, private companies interested in the topic of the project.
Innovation Development of an integrated evaluation and a novel approach to identify the best combination of sewage sludge treatments allowing to meet low carbon and energy recovery goals, at support of sludge producers and users as well as of authorities for territorial planning.
Follow up of -
Follow up fundings