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About
Main goals:
- Containerised (transportable) system for the purification of the water from digestate, utilizing drying and condensation, that will allow quick and efficient deployment and integration with an existing infrastructure, thus achieving CAPEX at a competitive level, by reducing the required assembly time.
- Modular technology designed as a PnP solution, allowing straightforward integration with an existing infrastructure of the plant, with a possibility of further integration of modules, achieving their commercial readiness (HTC).
- Cost efficient purification of water, which will involve optimization of OPEX by utilization of membranes requiring lower pressure (in comparison with state-of-the-art solutions) and utilization of a part of the hydrochar stream and magnetic hydrochar for filter columns.
- Sustainability of the technology by utilization of a low grade heat (latent heat of vaporization) for drying and a part of the hydrochar stream as a fuel for the heat source for the hydrothermal carbonization.
- The unique solution to make the hydrochar as magnetic biochar for waste water application, with a high potential for patentability, will be developed by KTH basing on KTH’s exiting knowledge and facilities.
- Zero waste and zero liquid discharge technology, thanks to recirculation of the reject liquid back to the anaerobic digestion and turning solids into a sellable product (soil amendment, magnetic hydrochar - sorbent).
- “Smart grid ready” – possibility for active management of the demand side and use of the electricity with marginal price by including the water accumulation unit.
- Enabling sustainable management of water resources by using streams that are presently neglected.
Project proposes innovative, transdisciplinary approach, by enabling an access to the potential water resources, currently neglected, i.e. water evaporated during drying of high moisture solid fermentation products. Moreover, project is aiming to achieve high synergy by integrating the water recovery with improved heat balance of the drying process and additional utilization of the latent heat, that could be recovered during the water condensation. Furthermore, project proposes to apply the hydrothermal carbonization (HTC), thus bringing the potential for synergy, due to positive effects in terms of dewaterability and sanitization.
