A Brief Overview on the Utilization of Biomass Ash in Biogas Production and Purification

Alavi-Borazjani, Seyedeh Azadeh; Tarelho, L.A.C.; Capela, Isabel

doi:10.1007/s12649-021-01461-7

Cited by 8 publications

(4 citation statements)

References 68 publications

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“…Concerning the use of WA as an additive for AD, to the authors' knowledge, 6 experimental studies have been reported so far on this topic (Table 1). Furthermore, Alavi-Borazjani et al [31,32] provided an insight into the feasibility of the utilization of biomass ashes in AD and biogas upgrading. According to Alavi-Borazjani et al (2020), biomass ashes are cheap sources of alkali suitable for controlling the excessive acidification of anaerobic digesters.…”

Section: Use Of Wa As An Additive For Enhancing the Admentioning

confidence: 99%

“…The main targeted compounds to be removed from the biogas are CO2 and H2S. Given the complexity of the WA, there is a knowledge gap on the absorption capacity of bulk WA, and gathering more information to fully appreciate the valorization opportunities of this material is required [31,32].…”

Section: Use Of Wa As An Additive For Enhancing the Admentioning

confidence: 99%

“…Most frequently used purification technologies (water/amine scrubbing, pressure swing adsorption, cryogenic distillation, and membrane) require an excessive amount of energy and chemicals. The main targeted compounds to be removed from the biogas are CO 2 and H 2 S. Given the complexity of the WA, there is a knowledge gap on the absorption capacity of bulk WA, and gathering more information to fully appreciate the valorization opportunities of this material is required [31,32]. Composition of Anaerobic Digestate [33] 1.…”

Section: Use Of Wa As An Additive For Enhancing the Admentioning

confidence: 99%

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Wood Ash Based Treatment of Anaerobic Digestate: State-of-the-Art and Possibilities

Abelenda

Aiouache

2022

Processes

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The problem of current agricultural practices is not limited to land management but also to the unsustainable consumption of essential nutrients for plants, such as phosphorus. This article focuses on the valorization of wood ash and anaerobic digestate for the preparation of a slow-release fertilizer. The underlying chemistry of the blend of these two materials is elucidated by analyzing the applications of the mixture. First, the feasibility of employing low doses (≤1 g total solids (TS) ash/g TS digestate) of wood ash is explained as a way to improve the composition of the feedstock of anaerobic digestion and enhance biogas production. Secondly, a detailed description concerning high doses of wood ash and their uses in the downstream processing of the anaerobic digestate to further enhance its stability is offered. Among all the physico-chemical phenomena involved, sorption processes are meticulously depicted, since they are responsible for nutrient recovery, dewatering, and self-hardening in preparing a granular fertilizer. Simple activation procedures (e.g., carbonization, carbonation, calcination, acidification, wash, milling, and sieving) are proposed to promote immobilization of the nutrients. Due to the limited information on the combined processing of wood ash and the anaerobic digestate, transformations of similar residues are additionally considered. Considering all the possible synergies in the anaerobic digestion and the downstream stages, a dose of ash of 5 g TS ash/g TS digestate is proposed for future experiments.

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Section: Use Of Wa As An Additive For Enhancing the Admentioning

confidence: 99%

Section: Use Of Wa As An Additive For Enhancing the Admentioning

confidence: 99%

Section: Use Of Wa As An Additive For Enhancing the Admentioning

confidence: 99%

See 1 more Smart Citation

Wood Ash Based Treatment of Anaerobic Digestate: State-of-the-Art and Possibilities

Abelenda

Aiouache

2022

Processes

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“…Despite the potential of biomass combustion ashes in environmental applications [44], our literature review suggests that the possibility of using SCBA for biogas treatment, specifically for hydrogen sulfide (H 2 S) removal, has yet to be reported. H 2 S in biogas is an undesirable contaminant that corrodes metallic parts of gas engines [45] or gas turbines [46].…”

Section: Introductionmentioning

confidence: 99%

Adding Value to Sugarcane Bagasse Ash: Potential Integration of Biogas Scrubbing with Vinasse Anaerobic Digestion

Garcia-Perez,

Ortiz-Ulloa,

Jara-Cobos

et al. 2023

Sustainability

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One of the byproducts of sugarcane bagasse combustion in sugarcane mills is sugarcane bagasse ash (SCBA), which contains up to ~40 mass% of organic matter. Currently, SCBA is partially used as a soil fertilizer. However, SCBA’s poor content of minerals, which are required by soils, restricts its use in soils, resulting in the disposal of large amounts of SCBA in landfills. Alternatively, SCBA has shown promise for some environmental applications such as wastewater treatment, but its use in gas cleaning deserves further study. The objective of this work was to assess the use of as-received SCBA to remove hydrogen sulfide (H2S) from biogas, thus, to add value to the ash. The experimental procedure consisted of passing biogas containing H2S through a column with SCBA and monitoring the H2S content inline by employing a gas chromatograph until the concentration of H2S, measured after the column, was ~10% of the original concentration. The breakthrough time of the SCBA adsorption curve was ~75% the breakthrough time observed with activated carbon, showing that SCBA could be a cheap alternative to commercial materials that are currently used for biogas scrubbing. This result could positively impact ethanol sugarcane mills that need to clean biogas produced from vinasses, as part of a strategy to integrate biogas production and cleaning operations using low-value residues (i.e., vinasses and ash). SCBA’s capacity for removing H2S from biogas results from the presence of K-compounds (e.g., K2SiO3 and K2Si2O5) on the ash’s surface and its relatively high porosity. Additionally, S-enriched SCBA (due to H2S retention) can expectedly be more beneficial to soils than directly adding the ash since S is an essential nutrient for the growth of plants.

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Biochemical Methane Potential Enhancement Through Biomass Fly Ash Addition

Rodrigues,

Almeida,

Martinho

et al. 2023

Environmental Science and Engineering

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A Brief Overview on the Utilization of Biomass Ash in Biogas Production and Purification

Cited by 8 publications

References 68 publications

Wood Ash Based Treatment of Anaerobic Digestate: State-of-the-Art and Possibilities

Wood Ash Based Treatment of Anaerobic Digestate: State-of-the-Art and Possibilities

Adding Value to Sugarcane Bagasse Ash: Potential Integration of Biogas Scrubbing with Vinasse Anaerobic Digestion

Biochemical Methane Potential Enhancement Through Biomass Fly Ash Addition

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