Laboratory method of microbial induced solidification/stabilization for municipal solid waste incineration fly ash

Xu, Hui; Hao, Zhengping; Wang, Jinnan; Ding, Xueqin; Chen, Ping

doi:10.1016/j.mex.2019.05.006

Cited by 25 publications

(7 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Microbial-induced calcium carbonate precipitation (MICP) has emerged as a potential treatment method for the immobilization and stabilization of MSWI FA. In recent years, MICP has been widely used in the fields of heavy metal-contaminated soil treatment, restoration of cultural relics, and manufacture of self-healing bioconcrete. , MSWI FA is enriched with calcium, which through the metabolic activity of bacteria produces calcite (CaCO 3 ) as a binding agent. , In this case, calcium ions can combine with the negatively charged bacterial cell surface to form CaCO 3 crystals, which are used to fill the voids and thus increase the stress resistance . In addition, heavy metals are immobilized in the form of carbonates or coprecipitates, displacing Ca 2+ in the calcite lattice or filling vacancies in the crystal .…”

Section: Combination Of Methodsmentioning

confidence: 99%

“…224,225 MSWI FA is enriched with calcium, which through the metabolic activity of bacteria produces calcite (CaCO 3 ) as a binding agent. 226,227 In this case, calcium ions can combine with the negatively charged bacterial cell surface to form CaCO 3 crystals, which are used to fill the voids and thus increase the stress resistance. 228 In addition, heavy metals are immobilized in the form of carbonates or coprecipitates, displacing Ca 2+ in the calcite lattice or filling vacancies in the crystal.…”

Section: Combination Of Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Advances and Outlook of Heavy Metal Treatment Technology from Municipal Solid Waste Incineration Fly Ash: A Review

Xiao,

Huang,

Cheng

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

With the global industrialization process and socioeconomic development, the amount of municipal solid waste (MSW) generated is growing significantly. With the growth trend of municipal solid waste, incineration is widely used for waste treatment but produces a large amount of municipal solid waste incineration fly ash, which contains heavy metals that can seriously harm human health and the ecological environment. In this Review, the current situation of MSWI fly ash disposal is reviewed, and the technologies for harmless disposal and resource utilization of heavy metals in MSWI fly ash are summarized, including solidification stabilization, leaching extraction, heat treatment, combination methods, etc. We meticulously summarized the recent progress of various incineration fly ash disposal technologies, analyzed the difficulties and solutions in formulating various feasible technical strategies, and compared their potential in the safe, environmentally friendly, and economical utilization of MSW fly ash resources. Furthermore, we also provide an outlook on the potential challenges and prospects of future progress in the harmless disposal and resource recycling of fly ash.

show abstract

Section: Combination Of Methodsmentioning

confidence: 99%

Section: Combination Of Methodsmentioning

confidence: 99%

Advances and Outlook of Heavy Metal Treatment Technology from Municipal Solid Waste Incineration Fly Ash: A Review

Xiao,

Huang,

Cheng

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…As per 183 , $2 to $72 cost is required for the raw material in chemical grouting, whereas only $0.5 to $9.0 is needed in MICP-based biogrouting for one m 3 of soil treatment. In this process, utilizing various waste for microbial nutrient and cementation reagents makes not only the MICP process cost-effective but also environmental friendly [ 190 , 191 , 25, 172 , 192–194 , 5 , 160 ]. Also, the ubiquitous nature of denitrifying microbes assists in implementing the MICP technique via biostimulation and makes the process more cost-effective compared to other augmentation-based MICP techniques.…”

Section: Challenges In Denitrification For In Situ Application and Perspectivesmentioning

confidence: 99%

A critical review on microbial carbonate precipitation via denitrification process in building materials

2021

View full text Add to dashboard Cite

The naturally occurring biomineralization or microbially induced calcium carbonate (MICP) precipitation is gaining huge attention due to its widespread application in various fields of engineering. Microbial denitrification is one of the feasible metabolic pathways, in which the denitrifying microbes lead to precipitation of carbonate biomineral by their basic enzymatic and metabolic activities. This review article explains all the metabolic pathways and their mechanism involved in the MICP process in detail along with the benefits of using denitrification over other pathways during MICP implementation. The potential application of denitrification in building materials pertaining to soil reinforcement, bioconcrete, restoration of heritage structures and mitigating the soil pollution has been reviewed by addressing the finding and limitation of MICP treatment. This manuscript further sheds light on the challenges faced during upscaling, real field implementation and the need for future research in this path. The review concludes that although MICP via denitrification is an promising technique to employ it in building materials, a vast interdisciplinary research is still needed for the successful commercialization of this technique.

show abstract

“…The use of MICP technology for biocementation in the seawater environment provides a potential method for land reclamation. Xu et al [87] proposed an experimental scheme similar to that of Cheng, using no additional introduced exogenous Ca 2+ , and only using Ca 2+ from the fly ash of municipal incineration waste. The ratio of the fly ash to S. pasteurii bacterial solution was 1 kg:0.3 L. At 20 • C, humidity is not less than 95% for the 7 days curing experiment environment.…”

Section: External Bacteria Solidifying the Sandy Soilmentioning

confidence: 99%

Critical Review of Solidification of Sandy Soil by Microbially Induced Carbonate Precipitation (MICP)

et al. 2021

View full text Add to dashboard Cite

Microbially induced carbonate precipitation (MICP) is a promising technology for solidifying sandy soil, ground improvement, repairing concrete cracks, and remediation of polluted land. By solidifying sand into soil capable of growing shrubs, MICP can facilitate peak and neutralization of CO2 emissions because each square meter of shrub can absorb 253.1 grams of CO2 per year. In this paper, based on the critical review of the microbial sources of solidified sandy soil, models used to predict the process of sand solidification and factors controlling the MICP process, current problems in microbial sand solidification are analyzed and future research directions, ideas and suggestions for the further study and application of MICP are provided. The following topics are considered worthy of study: (1) MICP methods for evenly distributing CaCO3 deposit; (2) minimizing NH4+ production during MICP; (3) mixed fermentation and interaction of internal and exogenous urea-producing bacteria; (4) MICP technology for field application under harsh conditions; (5) a hybrid solidification method by combining MICP with traditional sand barrier and chemical sand consolidation; and (6) numerical model to simulate the erosion resistance of sand treated by MICP.

show abstract

Laboratory method of microbial induced solidification/stabilization for municipal solid waste incineration fly ash

Abstract: Graphical abstract

Cited by 25 publications

References 9 publications

Advances and Outlook of Heavy Metal Treatment Technology from Municipal Solid Waste Incineration Fly Ash: A Review

Advances and Outlook of Heavy Metal Treatment Technology from Municipal Solid Waste Incineration Fly Ash: A Review

A critical review on microbial carbonate precipitation via denitrification process in building materials

Critical Review of Solidification of Sandy Soil by Microbially Induced Carbonate Precipitation (MICP)

Contact Info

Product

Resources

About