Corn steep liquor as a nutritional source for biocementation and its impact on concrete structural properties

Corn steep liquor as a nutritional source for biocementation and its impact on concrete... Microbial-induced carbonate precipitation (MICP) has a potential to improve the durability properties and remediate cracks in concrete. In the present study, the main emphasis is placed upon replacing the expensive laboratory nutrient broth (NB) with corn steep liquor (CSL), an industrial by-product, as an alternate nutrient medium during biocementation. The influ - ence of organic nutrients (carbon and nitrogen content) of CSL and NB on the chemical and structural properties of concrete structures is studied. It has been observed that cement-setting properties were unaffected by CSL organic content, while NB medium influenced it. Carbon and nitrogen content in concrete structures was significantly lower in CSL-treated speci - mens than in NB-treated specimens. Decreased permeability and increased compressive strength were reported when NB is replaced with CSL in bacteria-treated specimens. The present study results suggest that CSL can be used as a replacement growth medium for MICP technology at commercial scale. Keywords Biomineralization · Curing · Organic admixture · Concrete · Corn steep liquor · Carbon and nitrogen content Introduction and Development (OECD) have reported that approximately 30% of greenhouse gases are emitted from the residential Concrete is one of the most widely used structural build- and commercial building sectors [45]. Energy requirements, ing materials http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Industrial Microbiology Biotechnology Springer Journals

Corn steep liquor as a nutritional source for biocementation and its impact on concrete structural properties

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Publisher
Springer International Publishing
Copyright
Copyright © 2018 by Society for Industrial Microbiology and Biotechnology
Subject
Life Sciences; Microbiology; Biochemistry, general; Inorganic Chemistry; Genetic Engineering; Biotechnology; Bioinformatics
ISSN
1367-5435
eISSN
1476-5535
D.O.I.
10.1007/s10295-018-2050-4
Publisher site
See Article on Publisher Site

Abstract

Microbial-induced carbonate precipitation (MICP) has a potential to improve the durability properties and remediate cracks in concrete. In the present study, the main emphasis is placed upon replacing the expensive laboratory nutrient broth (NB) with corn steep liquor (CSL), an industrial by-product, as an alternate nutrient medium during biocementation. The influ - ence of organic nutrients (carbon and nitrogen content) of CSL and NB on the chemical and structural properties of concrete structures is studied. It has been observed that cement-setting properties were unaffected by CSL organic content, while NB medium influenced it. Carbon and nitrogen content in concrete structures was significantly lower in CSL-treated speci - mens than in NB-treated specimens. Decreased permeability and increased compressive strength were reported when NB is replaced with CSL in bacteria-treated specimens. The present study results suggest that CSL can be used as a replacement growth medium for MICP technology at commercial scale. Keywords Biomineralization · Curing · Organic admixture · Concrete · Corn steep liquor · Carbon and nitrogen content Introduction and Development (OECD) have reported that approximately 30% of greenhouse gases are emitted from the residential Concrete is one of the most widely used structural build- and commercial building sectors [45]. Energy requirements, ing materials

Journal

Journal of Industrial Microbiology BiotechnologySpringer Journals

Published: May 28, 2018

References

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