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Updated: May 31, 2025

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor

Published on: October 15, 2015

Circular Economy Applied to Sludge Minimization: The STAR Project.

Maria Cristina Collivignarelli^1,2, Stefano Bellazzi¹, Alessandro Abbà³

¹Department of Civil Engineering and Architecture, University of Pavia, Via Ferrata 3, 27100 Pavia, Italy.

|January 24, 2025

Summary

Integrating a thermophilic aerobic membrane reactor (TAMR) significantly reduces wastewater sludge by up to 90%. This innovative approach enhances resource recovery and improves conventional activated sludge system performance.

Keywords:

resource recovery respirometric tests sludge minimization thermophilic membrane reactor

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Last Updated: May 31, 2025

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A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities

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Published on: December 25, 2015

Area of Science:

Environmental Engineering
Biotechnology
Wastewater Treatment

Background:

Biological sludge management from wastewater treatment plants (WWTPs) faces challenges from increasing production and emerging pollutants.
Efficient sludge reduction and resource recovery are critical for sustainable wastewater management.

Purpose of the Study:

To investigate the integration of a thermophilic aerobic membrane reactor (TAMR) for biological sludge minimization.
To assess resource recovery potential and compatibility with conventional activated sludge (CAS) systems.

Main Methods:

A six-month industrial-scale monitoring of a TAMR system in a medium-size WWTP.
Evaluation of volatile solids (VSs) reduction in thickened sludge.
Assessment of TAMR residue compatibility with CAS systems through respirometric tests.

Main Results:

The TAMR unit achieved up to a 90% reduction in volatile solids (VSs).
The STAR configuration (TAMR + CAS) reduced sludge output to 10% of conventional levels.
TAMR residues proved biologically treatable and suitable for reuse as carbon sources, enhancing CAS performance.

Conclusions:

Integrating mesophilic and thermophilic systems (like TAMR and CAS) significantly improves sludge management efficiency.
This approach lowers operating costs and reduces environmental impacts associated with wastewater treatment.
Enhanced resource recovery and improved system performance are key benefits of the STAR configuration.