Microbially Induced Desaturation and Carbonate Precipitation through Denitrification: A Review

Applied Sciences

Yusuf Cagatay Ersan¹  Xiaohui Cheng²  Wenbin Lin³  Wei Lin³  Guozhou Chen³ 

[1] Environmental Research and Application Centre, Department of Environmental Engineering, Hacettepe University, Ankara TR-06800, Turkey;Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing 100084, China;School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China;

关键词: nitrate reduction;    nitrogen gas;    calcium carbonate;    liquefaction mitigation;    self-healing concrete;    ground improvement;   

DOI  :  10.3390/app11177842

来源: DOAJ

【 摘 要 】

Microbially induced carbonate precipitation (MICP) has been proposed as a sustainable approach to solve various environmental, structural, geotechnical and architectural issues. In the last decade, a ubiquitous microbial metabolism, nitrate reduction (also known as denitrification) got attention in MICP research due to its unique added benefits such as simultaneous corrosion inhibition in concrete and desaturation of porous media. The latter even upgraded MICP into a more advanced concept called microbially induced desaturation and precipitation (MIDP) which is being investigated for liquefaction mitigation. In this paper, we present the findings on MICP through denitrification by covering applications under two main titles: (i) applications solely based on MICP, such as soil reinforcement, development of microbial self-healing concrete, restoration of artwork and historical monuments, and industrial wastewater treatment, (ii) an application based on MIDP: liquefaction mitigation. After explaining the denitrification process in detail and describing the MICP and MIDP reaction system occurring through denitrification metabolism, the most recent advances in each potential field of application are collected, addressing the novel findings and limitations, to provide insights toward the practical applications in situ. Finally, the research needs required to deal with the defined challenges in application-oriented upscaling and optimization of MICP through denitrification are suggested. Overall, collected research findings revealed that MICP through denitrification possesses a great potential to replace conventionally used petrochemical-based, labour intensive, destructive and economically unfeasible techniques used in construction industry with a bio-based, labourless, low-carbon technology. This worldwide applicable bio-based technology will facilitate the sustainable development and contribute to the carbon-emission-reduction.

【 授权许可】

Unknown