Sustainable Biocement Production via Microbially Induced Calcium Carbonate Precipitation: Use of Limestone and Acetic Acid Derived from Pyrolysis of Lignocellulosic Biomass,ACS Sustainable Chemistry & Engineering

当前位置： X-MOL 学术 › ACS Sustain. Chem. Eng. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Sustainable Biocement Production via Microbially Induced Calcium Carbonate Precipitation: Use of Limestone and Acetic Acid Derived from Pyrolysis of Lignocellulosic Biomass
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2017-05-24 00:00:00 , DOI: 10.1021/acssuschemeng.7b00521
Sun Gyu Choi ₁ , Jian Chu ₁ , Robert C. Brown ₂ , Kejin Wang ₃ , Zhiyou Wen ₄

Affiliation

Biocement production from microbially induced calcium carbonate precipitation (MICP) is an environmentally friendly approach for construction works, but the use of calcium chloride (CaCl₂) in the conventional MICP process is a cost-limiting factor. The aim of this work is to develop a method for producing soluble calcium ions through two waste sources, limestone powder derived from aggregate quarries and acetic acid derived from fast pyrolysis of lignocellulosic biomass, as a replacement for the reagent grade CaCl₂ in the MICP process. The ratio of limestone powder to acetic acid solution was optimized for a desirable calcium concentration with an appropriate pH. Procedures for applying the urease-producing bacteria, urea, and calcium solutions were developed for a successful MICP process and were treated for sand column test. The engineering properties of the biocemented sand, including water permeability, unconfined compressive strength, and tensile strength, were evaluated as a function of the calcium carbonate content of the product. It was found that the properties of the sand treated using the limestone/acetic acid derived calcium solution were comparable to those of sand treated using reagent grade CaCl₂. Collectively, the results indicate that the new MICP process is effective, more sustainable, and cheaper compared with the conventional MICP method.

中文翻译：

通过微生物诱导的碳酸钙沉淀实现可持续的生物水泥生产：利用木质纤维素生物质热解衍生的石灰石和乙酸

由微生物诱导的碳酸钙沉淀（MICP）生产生物水泥是一种环境友好的建筑工程方法，但是在常规MICP工艺中使用氯化钙（CaCl ₂）是一个成本限制因素。这项工作的目的是开发一种通过两种废物源生产可溶性钙离子的方法，该方法来自骨料采石场的石灰石粉和木质纤维素生物质的快速热解衍生的乙酸，以代替试剂级CaCl _2。在MICP过程中。优化石灰石粉与乙酸溶液的比例，以在适当的pH值下获得理想的钙浓度。已开发出用于产生脲酶的细菌，尿素和钙溶液的程序，以成功进行MICP过程，并进行了砂柱测试。评估了生物胶结砂的工程性能，包括水渗透性，无侧限抗压强度和抗张强度，这些都是产品碳酸钙含量的函数。发现使用石灰石/乙酸衍生的钙溶液处理的沙子的性能与使用试剂级CaCl ₂处理的沙子的性能相当。总的来说，结果表明，与传统的MICP方法相比，新的MICP工艺更有效，更可持续且更便宜。

更新日期：2017-05-24

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南