Biocementation for beach erosion control using seawater extracted soybean enzyme

IF 5.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Acta Geotechnica Pub Date : 2025-07-20 DOI:10.1007/s11440-025-02654-3

Wenhao Wang, Shifan Wu, Jian Chu, Karenne Tun

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Abstract

Beach erosion is a major challenge for coastal cities like Singapore. This is increasingly the case with greater impact from climate change and sea level rise. One of the new approaches in improving beach erosion resilience is biocementation using enzyme-induced carbonate precipitation (EICP). A field study was carried out using an EICP method with crude urease enzyme extracted from soybean. A simplified urease enzyme extraction procedure was developed to use seawater as the solvent. The use of seawater and a modified coarse filtration method enabled the enzyme extraction process to be done on site at an accelerated rate. A hybrid biogrout infiltration technique was also adopted on site to overcome the accumulation of unfavourable bioclogging effect. After the treatment, the strength of the treated slope surface increased to a maximum value of 2 MPa. The field tests also indicated that the simplified EICP method not only increased the resistance to wave or rainwater erosion but also facilitates the grass growth on the treated beach. This unique feature enables the proposed method to be an eco-friendly method too.

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海水萃取大豆酶生物胶结法防治海滩侵蚀

海滩侵蚀是新加坡等沿海城市面临的主要挑战。随着气候变化和海平面上升的影响越来越大，这种情况越来越明显。提高海滩侵蚀恢复能力的新方法之一是利用酶诱导碳酸盐沉淀（EICP）进行生物胶结。采用EICP法对大豆粗脲酶进行了田间研究。以海水为溶剂，开发了一种简化的脲酶提取工艺。使用海水和改进的粗过滤方法，酶提取过程可以在现场以更快的速度进行。现场还采用了混合生物灌浆入渗技术，克服了不利生物堵塞效应的积累。处理后，处理后的坡面强度最大可达2 MPa。现场试验还表明，简化后的EICP方法不仅提高了处理后滩涂的抗浪、抗雨水侵蚀能力，而且有利于滩涂草的生长。这种独特的特性使所提出的方法也是一种环保的方法。

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来源期刊

Acta Geotechnica ENGINEERING, GEOLOGICAL-

CiteScore

9.90

自引率

17.50%

发文量

297

审稿时长

4 months

期刊介绍： Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.