Self-healing bioconcrete based on non-axenic granules: A potential solution for concrete wastewater infrastructure. (August 2021)

• Record Type: Journal Article
• Authors: Chetty, Kirthi; Xie, Sihuang; Song, Yarong; McCarthy, Timothy; Garbe, Ulf; Li, Xuan; Jiang, Guangming
• Is Part Of: Journal of water process engineering. Volume 42(2021)
• Publication Date: 2021-08
• Subjects: Self-healing -- Bioconcrete -- Axenic cultures -- Non-axenic cultures; Water-supply engineering -- Periodicals; Saline water conversion -- Periodicals; Seawater -- Distillation -- Periodicals; Sanitary engineering -- Periodicals; Sewage -- Purification -- Periodicals; 627
• DOI: 10.1016/j.jwpe.2021.102139
• Languages: English
• ISSNs: 2214-7144

Abstract

Highlights: Non-axenic cultures as potential self-healing agents. Granular sludge to develop bioconcrete for wastewater infrastructure. Spore formation for long-term survival. Abstract: This paper summarized the metabolic pathways, mechanisms, and performance of various microbial induced calcite precipitation (MICP) microorganisms as self-healing agents for the development of self-healing bioconcrete. Despite the remarkable progress achieved to date, the high costs involved in the cultivation and encapsulation of the axenic cultures have led to a shift of research focus towards the use of non-axenic microbial cultures. They have superior benefits as self-healing agents in terms of easy cultivation and low cost. Granular sludge was widely used in wastewater treatment. Considering the high need for concrete-based wastewater infrastructure, granular sludge cultivated using wastewater has the potential to develop bioconcrete for sewer systems and wastewater treatment plants. To achieve large-scale application, future research should enhance the understanding of the long-term performances and develop systematic and comparable evaluation methods.