Zero-waste approach in municipal solid waste incineration: Reuse of bottom ash to stabilize fly ash

Assi, Ahmad; Bilo, Fabjola; Zanoletti, Alessandra; Ponti, Jessica; Valsesia, Andrea; Spina, Rita La; Zacco, Annalisa; Bontempi, Elza

doi:10.1016/j.jclepro.2019.118779

Cited by 124 publications

(71 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In contrast, stabilized sample revealed higher S concentration compared with FA due to FGD residues addition for stabilization. Based on data reported in Table 2, we can conclude that the lower Zn and Pb leachability must be attributed to the carbonation and pozzolanic reactions that occur during stabilization [21]. It is already shown that pH is a key factor that affects heavy metals leaching behaviors.…”

Section: Txrf Analysismentioning

confidence: 73%

“…CFA revealed only two crystalline phases:-quartz and mullite [29]. In this study, the sample was prepared by mixing FA, CFA, FGD and BA, as reported by Assi et al [21]. Tap water (25 kg) at room temperature was also used.…”

Section: Stabilization Procedures On the Pilot Plantmentioning

confidence: 99%

“…X-ray diffraction (XRD) is performed for structural and microstructural characterization of the raw powders [21] and the stabilized sample after 11 M (see Figure 3). XRD patterns were acquired by means of an X'Pert PRO Bragg Brentano diffractometer (Malvern PANalytical, UK) equipped with a Cu K anode and operating at 40 kV and a current of 40 mA.…”

Section: Xrdmentioning

confidence: 99%

“…Leaching test was performed to raw powders and stabilized sample according the CEN normative (CEN EN 12457-2) [30] and optimized procedure [14,21]. For leaching tests, 20 g of each sample were mixed with 200 mL MQ water (1:10) and mixed at room temperature for 2 h by a magnetic stirrer.…”

Section: Leaching Testsmentioning

confidence: 99%

“…Finally, FA was treated by using BA, considered as a new urban mining source due to the pozzolanic characteristics of BA [21]. This can be really considered a zero-waste treatment, requiring only mixing of ashes deriving from the same incinerator.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A Circular Economy Virtuous Example—Use of a Stabilized Waste Material Instead of Calcite to Produce Sustainable Composites

et al. 2020

Self Cite

View full text Add to dashboard Cite

This work reports and analyzes the mechanical properties of some composites obtained using stabilized waste with epoxy resins E-227. For comparison, correspondent composite samples were realized using calcite as a filler. The recovered stabilized waste was obtained by means of a new method to stabilize municipal solid waste incineration (MSWI) fly ash (FA), based on the use of bottom ash (BA). The aim of this paper is to show that the stabilization process, which can be considered a zero—waste treatment, produces inert materials, that can be reused as a filler. The production of new filler was made on a pilot plant, designed to verify the transferability of the proposed stabilization technology. Mechanical analysis revealed that flexural modulus raises by increasing the filler content around 30% wt, independently of filler type, stabilized sample or calcium carbonate. Mechanical properties are lower in the samples with the high amount of filler due to the crowding effect. The morphology of composite materials showed a non-homogeneous dispersion of particles in stabilized sample filler, characterized by large particle agglomerates. Finally, according to the ESCAPE simplified method, the obtained composites result more sustainable in comparison with the corresponding ones produced by using natural resources (like calcite). These findings open new possibilities for the reuse of the stabilized material, in frame of circular economy principles, with environmental and economic advantages.

show abstract

Section: Txrf Analysismentioning

confidence: 73%

Section: Stabilization Procedures On the Pilot Plantmentioning

confidence: 99%

Section: Xrdmentioning

confidence: 99%

Section: Leaching Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations