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On-line Access: 2024-01-15

Received: 2023-01-05

Revision Accepted: 2023-04-14

Crosschecked: 2024-01-15

Cited: 0

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Citations:  Bibtex RefMan EndNote GB/T7714


Xiaoniu YU


Yidong XU


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Journal of Zhejiang University SCIENCE A 2024 Vol.25 No.1 P.36-46


Biotreatment of incinerated bottom ash and biocementation of sand blocks using soybean urease

Author(s):  Xiaoniu YU, Yidong XU

Affiliation(s):  Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China; more

Corresponding email(s):   xyd@nit.zju.edu.cn

Key Words:  Biocement, Soybean-powder filtrate (SPF), Removal efficiency, Sandy soil, Unconfined compressive strength (UCS)

Xiaoniu YU, Yidong XU. Biotreatment of incinerated bottom ash and biocementation of sand blocks using soybean urease[J]. Journal of Zhejiang University Science A, 2024, 25(1): 36-46.

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author="Xiaoniu YU, Yidong XU",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Biotreatment of incinerated bottom ash and biocementation of sand blocks using soybean urease
%A Xiaoniu YU
%A Yidong XU
%J Journal of Zhejiang University SCIENCE A
%V 25
%N 1
%P 36-46
%@ 1673-565X
%D 2024
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2300006

T1 - Biotreatment of incinerated bottom ash and biocementation of sand blocks using soybean urease
A1 - Xiaoniu YU
A1 - Yidong XU
J0 - Journal of Zhejiang University Science A
VL - 25
IS - 1
SP - 36
EP - 46
%@ 1673-565X
Y1 - 2024
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2300006

Because of the high cost of cultivating urease-producing bacteria (UPB), this paper proposes soybean-urease-induced carbonate precipitation (SUICP) as a novel biocement for treatment of nickel contaminants and cementation of sandy soil. We found the optimal soaking time and soybean-powder content to be 30 min and 130 g/L, respectively, based on a standard of 5 U of urease activity. The most efficient removal of nickel ions is obtained with an ideal mass ratio of urea to nickel ions to soybean-powder filtrate (SPF) of 1׃2.4׃20. The removal efficiency of nickel ions can reach 89.42% when treating 1 L of nickel-ion solution (1200 mg/L with the optimal mass ratio). In incinerated bottom ash (IBA), the removal efficiency of nickel ions is 99.33% with the optimal mass ratio. In biocemented sandy soil, the average unconfined compressive strength (UCS) of sand blocks cemented with soybean urease-based biocement can reach 118.89 kPa when the cementation level is 3. Currently, the average content of CaCO3 in sand blocks is 2.52%. As a result, the SUICP process can be applied to remove heavy metal ions in wastewater or solid waste and improve the mechanical properties of soft soil foundations.




Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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