EVALUATION OF COFFEE BIOWASTE AS A CARRIER FOR BACTERIA IMMOBILIZATION FOR SELF-HEALING EFFECT OF CEMENT

XXIX kongres DIMK i X kongres SIGP sa Međunarodnim simpozijumom o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija (2025) [pp. 435-443]  

AUTHOR(S) / AUTOR(I): Olja Šovljanski , Tiana Milović , Vesna Bulatović

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DOI: 10.46793/29DIMK.435S

ABSTRACT / SAŽETAK:

The construction industry faces significant challenges related to the durability and sustainability of traditional concrete structures. This study explores the innovative use of spent coffee grounds (i.e. coffee biowaste) as a multifunctional carrier for bacteria engineered to induce the autonomous self-healing effect of the cement-based matrix. Coffee biowaste, a readily available and sustainable byproduct, was evaluated for its potential to serve as both a nutrient source and protective matrix for bacteria capable of precipitating calcium carbonate (CaCO3) to seal cracks. The bacterium, Bacillus licheniformis, isolated from a Danube-related source, was immobilized within the selected carrier, and their viability, release kinetics, and self-healing efficiency were assessed under various environmental conditions.

KEYWORDS / KLJUČNE REČI:

Microbial technologies; Bacillus licheniformis; Spent coffee grounds

ACKNOWLEDGEMENT / PROJEKAT:

This research has been supported by the Ministry of Science, Technological Development and Innovation through Contract No. 451-03-136/2025-03/200156 (T.M.), Contract No. 451-03-137/2025-03/200156 (V.B.), and 451-03-136/2025- 03/200134 (O.Š.), and the Faculty of Technical Sciences, University of Novi Sad through project “Scientific and Artistic Research Work of Researchers in Teaching and Associate Positions at the Faculty of Technical Sciences, University of Novi Sad 2025” (No. 01- 50/295).

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