Research status, hot spots, difficulties and future development direction of microbial geoengineering  

作　　者：Yingxin Zhou Zhiqing Li Peng Zhang Qi Wang Weilin Pan Shuangjiao Wang Xiongyao Xie 

机构地区：[1]Department of Geotechnical Engineering,College of Civil Engineering,Tongji University,Shanghai 200092,China [2]Yunnan Communications Investment&Construction Group Co.,Ltd.,Kunming 650103,China [3]Key Laboratory of Shale Gas and Geoengineering,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China [4]College of Earth and Planetary Science,University of Chinese Academy of Sciences,Beijing 100049,China [5]Innovation Academy for Earth Science,Chinese Academy of Sciences,Beijing 100029,China [6]China Energy Technology and Economics Research Institute,Beijing 102211,China [7]Cangzhou Qugang Expressway Construction Co.,Ltd.,Cangzhou 062450,China [8]Henan Yelu Expressway Construction Co.,Ltd.,Pingdingshan 467000,China [9]Beijing Zhongyan Tiandi Technology Co.,Ltd.,Beijing 100029,China

出　　处：《Journal of Road Engineering》2024年第2期234-255,共22页道路工程学报（英文）

基　　金：This work was financed by the Second Tibetan Plateau Scientific Expedition and Research Program(STEP)(Grant No.2019QZKK0904);the Key Research and Development Plan of Yunnan Province(Grant No.202103AA080013).

摘　　要：Microbial geoengineering technology,as a new eco-friendly rock and soil improvement and reinforcement technology,has a wide application prospect.However,this technology still has many deficiencies and is difficult to achieve efficient curing,which has become the bottleneck of large-scale field application.This paper reviews the research status,hot spots,difficulties and future development direction microbial induced calcium carbonate precipitation(MICP)technology.The principle of solidification and the physical and mechanical properties of improved rock and soil are systematically summarized.The solidification efficiency is mainly affected by the reactant itself and the external environment.At present,the MICP technology has been preliminarily applied in the fields of soil solidification,crack repair,anti-seepage treatment,pollution repair and microbial cement.However,the technology is currently mainly limited to the laboratory level due to the difficulty of homogeneous mineralization,uneconomical reactants,short microbial activity period and large environmental interference,incidental toxicity of metabolites and poor field application.Future directions include improving the uniformity of mineralization by improving grouting methods,improving urease persistence by improving urease activity,and improving the adaptability of bacteria to the environment by optimizing bacterial species.Finally,the authors point out the economic advantages of combining soybean peptone,soybean meal and cottonseed as carbon source with phosphogypsum as calcium source to induce CaCO3.

关 键 词：Microbial geoengineering Microbial induced calcium carbonate PRECIPITATION Bacillus pasteurii UREASE PHOSPHOGYPSUM 

分 类 号：TU472[建筑科学—结构工程] Q939.9[建筑科学—土工工程]