A fast and simple method to monitor carbonation of MSWI bottom ash under static and dynamic conditions

Brück, Felix; Fröhlich, Christine; Mansfeldt, Tim; Weigand, Harald

doi:10.1016/j.wasman.2018.06.042

Cited by 17 publications

(7 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, a considerable amount of residual material is still generated after the incineration process: typically MSW incineration fly ash (MSWI-FA) and MSW incineration bottom ash (MSWI-BA) [4,5]. MSWI-BA accounts for nearly 80% of the total residual by mass and is complex, consisting of combustion residue and non-combustible constituents of the waste feed [6][7][8]. In Europe and Asia, MSWI-BA is often classified as non-hazardous waste [9].…”

Section: Introductionmentioning

confidence: 99%

Metals Leaching in Permeable Asphalt Pavement with Municipal Solid Waste Ash Aggregate

Zhao

Zhu

2019

Water

View full text Add to dashboard Cite

The leaching behaviors of four heavy metals (Zn, Pb, Cu and Cr) from unbounded municipal solid waste incineration-bottom ash aggregate (MSWI-BAA) and permeable asphalt (PA) mixture containing MSWI-BAA were investigated in the laboratory. The horizontal vibration extraction procedure (HVEP) test and a simulated leaching experiment were conducted on MSWI-BAA with three particle sizes, but only the simulated leaching experiment was carried out on a type of PA specimen (PAC-13) with and without these MSWI-BAAs. Leaching data were analyzed to investigate the leaching characteristics, identify the factors affecting leaching and assess the impact on the surrounding environment. Results indicated that the leaching process was comprehensively influenced by contact time, leaching metal species and MSWI-BAA particle size, regardless of MSWI-BAA alone or used in PAC-13 mixture. The leaching concentrations of Cr, Zn and Pb from MSWI-BAA in HVEP testing was strongly related to MSWI-BAA particle size. The use of MSWI-BAA in PAC-13 mixture did not change the basic tendency of heavy metal leaching, but it led to an increase of Cr and Zn in leachate overall. The leachate from the MSWI-BAA and PAC-13 mixture with MSWI-BAA was shown to be safe for irrigation and would have very little negative impact on surrounding surface and underground water quality.

show abstract

Section: Introductionmentioning

confidence: 99%

Metals Leaching in Permeable Asphalt Pavement with Municipal Solid Waste Ash Aggregate

Zhao

Zhu

2019

Water

View full text Add to dashboard Cite

show abstract

“…Lombardi et al ( 2016) compared two reactor designs for CO 2 sequestration from flue gas by BA and confirmed this assumption. Similar results were obtained by Brück et al (2018). Continuously operated rotating drums are used in a series of industrial applications to provide the solid's motion (Sherritt et al 2003).…”

Section: Introductionsupporting

confidence: 55%

Putting accelerated carbonation of bottom ash into practice: operation of a semi full scale continuously fed rotating drum reactor

Weigand¹,

Brück²,

Schnabel³

Global NEST International Conference on Environmental Science &Amp; Technology

View full text Add to dashboard Cite

Bottom ash is the dominant residue from municipal solid waste or refuse-derived fuel incineration. Disposal costs chiefly depend on the leachability of trace metals and salts. The mobility of these constituents is classically minimized by ageing the material for several months. Ageing involves the oxidation of metals, dissolution and precipitation of hydroxides and salts, and most importantly, carbonation of the bottom induced by the uptake of atmospheric carbon dioxide. Technically enhanced exposure to carbon dioxide sources has been referred to as accelerated carbonation. Here we report on the successful implementation of the accelerated carbonation of bottom ash in a continuous pilot-scale rotating drum reactor operated with the flue gas of a cogeneration plant. The system was tested in 20 field trials that aimed at stabilizing the ash such as to comply with the regulatory standards for disposal on a lower landfill class or for its geotechnical re-use. Performance and process efficiency were addressed by maximizing reactor loading and minimizing the residence time of bottom ash. While leachtate values of the fresh bottom ash were indicative of a hazardous waste pertaining to a class III landfill, the carbonated material fulfilled the regulatory standards for a class I landfill and was, in addition, complied with the standards for geotechnical re-use. In the field trials bottom ash residence times could be cut to 30 minutes thus allowing for an on-line integration of the accelerated carbonation process.

show abstract

“…The reactor was instrumented with a piezoresistive pressure sensor (OxiTop, WTW, Weilheim, Germany) with a tolerance of ± 1 hPa to record the pressure drop induced by CO 2 uptake and with wireless temperature/humidity sensors (AREXX TSN‐TH70E, RS Zwolle, The Netherlands) with tolerances of ± 1 °C and ± 0.5% relative humidity. Modifying a similar set‐up used by Brück et al ., 27 the system was equipped with a solenoid valve‐controlled CO 2 supply attached to a gas cylinder (CO 2 , N4.5). By automated opening and closing of the valve the reactor was held at atmospheric pressure ± 7.5 kPa.…”

Section: Methodsmentioning

confidence: 99%

“…Prior to carbonation, leak tests were performed at −15 kPa and +15 kPa relative to atmosphere while monitoring pressure constancy for at least 30 min. Reactor preparation also involved several purging steps as described by Brück et al 27 . During the purging and before sealing, the CO 2 concentration reached the target, but no pressure measurement was possible for approximately 2 min.…”

Section: Methodsmentioning

confidence: 99%

“…The specific CO 2 uptake of the materials ( ζ in mol kg −1 DM) was calculated from the pressure drop in the reactor according to Eqn 4 where m material is the sample dry matter (kg), R is the universal gas constant (8.314 J mol −1 K −1 ), V is the void volume of the reactor (m 3 ) corrected for the sample and rack volumes, z is the total number of logging intervals, and T is the absolute temperature (K) of the gas phase. For details please refer to Brück et al 27 . The pressure course followed a sawtooth pattern imposed by the CO 2 uptake and the automated CO 2 supply (cf.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Technically exploitable mineral carbonation potential of four alkaline waste materials and effects on contaminant mobility

et al. 2021

Self Cite

View full text Add to dashboard Cite

Mineral carbonation of alkaline wastes can contribute to the sequestration of carbon dioxide (CO2). In this study we examined the CO2 sequestration potential of four dry‐discharged waste materials using theoretical and experimental approaches. The materials encompassed biomass bottom ash, biomass fly ash, refuse‐derived fuel fly ash, and stainless‐steel slag. Their CO2 sequestration potential was determined from the acid neutralization capacity (ANC) and alternatively from the elemental composition using the Steinour equation (StE). Results were compared to experimental data from batch carbonation tests performed with pure CO2 at near atmospheric pressure over 7 days. Influence of water content on the CO2 uptake was determined in short‐term carbonation tests over 2 hr. Effects related to the hydration and the subsequent carbonation were investigated by thermogravimetric analysis and leaching tests. Depending on the material the experimental CO2 uptakes ranged from 0.99 to 2.54 mol kg−1. The ANC‐based approach either under‐ or overestimated the experimental CO2 uptake and the StE strongly overestimated the experimental CO2 uptake throughout. Except for biomass fly ash the experimental CO2 uptake within a test period of 2 hr depended on the moisture content. Upon carbonation the leachate pH decreased and amphoteric trace elements tended to be immobilized. In contrast to this, the mobility of oxyanions increased by two orders of magnitude. Our results suggest that for the design of CO2 sequestration strategies experimental investigations of the CO2 uptake are preferable to indirect estimates. When using waste materials for CO2 sequestration, effects on contaminant mobility must be considered since these determine disposal costs. © 2021 The Authors. Greenhouse Gases: Science and Technology published by Society of Chemical Industry and John Wiley & Sons, Ltd.

show abstract

A fast and simple method to monitor carbonation of MSWI bottom ash under static and dynamic conditions

Cited by 17 publications

References 27 publications

Metals Leaching in Permeable Asphalt Pavement with Municipal Solid Waste Ash Aggregate

Metals Leaching in Permeable Asphalt Pavement with Municipal Solid Waste Ash Aggregate

Putting accelerated carbonation of bottom ash into practice: operation of a semi full scale continuously fed rotating drum reactor

Technically exploitable mineral carbonation potential of four alkaline waste materials and effects on contaminant mobility

Contact Info

Product

Resources

About