Co-digestion of sewage sludge and wood fly ash

Bauer, Torben; Pelkonen, Mirjami; Lagerkvist, Anders

doi:10.1080/09593330.2020.1856937

Cited by 4 publications

(3 citation statements)

References 18 publications

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“…With excessive ash dose, C/N increased due to the accumulation of VFA. Composition of Anaerobic Digestate [38] 1.…”

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

confidence: 99%

“…The following are available online at https://www.mdpi.com/article/10 .3390/pr10010147/s1, Figure S1: Setup employed by Lo et al [35]; Figure S2: Process flow diagram of the study of Bauer at el. [38]; Figure S3: Process flow diagram of the study of Cimon et al [39]; Figure S4: Profile of maturity of anaerobic digestate as per the results of Wang et al [58]; Figure S5: Inhibited BMP test due to high COD described by Banks et al [47,48]; Figure S6: Inhibited BMP test due to low S/I described by Banks et al [47,48]; Figure S7: Summary of the BMP results with biochar and WA reported by of Cimon et al [39]; Table S1: Upper limit of heavy metals for anaerobic digestate and PLA established in UK regulations [46,84]; Table S2: Blending ration of WA and anaerobic digestate as per the UK regulations.…”

Section: Supplementary Materialsmentioning

confidence: 99%

“…Schematic block flow diagram of the proposed downstream processing of the anaerobic digestate with WA to produce a granular organic fertilizer (%TS = percentage of total solids). Elaborated considering the different treatments, synergies, and technologies that can be implemented with a blend of WA and anaerobic digestate[28,29,35,[37][38][39]74,75].…”

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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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“…With excessive ash dose, C/N increased due to the accumulation of VFA. Composition of Anaerobic Digestate [38] 1.…”

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

confidence: 99%