Mild sulphuric acid pre-treatment for metals removal from biosolids and the fate of metals in the treated biosolids derived biochar

Hakeem, Ibrahim Gbolahan; Halder, Pobitra; Marzbali, Mojtaba Hedayati; Patel, Savankumar; Rathnayake, Nimesha; Surapaneni, Aravind; Short, Graeme; Paz‐Ferreiro, Jorge; Shah, Kalpit

doi:10.1016/j.jece.2022.107378

Cited by 22 publications

(4 citation statements)

References 81 publications

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“…Fourier-transformed infrared spectroscopy (FTIR, Spectrum 100, Perkin Elmer, Shelton, CT, USA) was used for the assessment of the surface chemical functional groups of unmodified and KOH-modified biochar over the wavebands of 4000-650 cm −1 . The surface area of the biochar was analysed using Brunauer-Emmett-Teller (BET) surface area analysis using a Micrometritics TriStar II instrument (Norcross, GA, USA), according to Hakeem, Halder [24]. Inductively coupled plasma mass spectrometry (ICP-MS-700 Series, Agilent Technologies, Santa Clara, CA, USA) was used to measure the concentration of the trace metals in the biochar following acid digestion, according to method 3050B [41].…”

Section: Biochar Treatment and Characterisationmentioning

confidence: 99%

“…In 2021, Australia produced 349,000 tonnes of dry biosolids, which is 16% higher than the biosolids produced in 2010 (300,000 tonnes) [23]. The presence of contaminants in biosolids, such as per-and poly-fluoroalkyl (PFAs) sub-stances and heavy metals, threatens its land application in agriculture, which is the largest end use of biosolids [24]. The pyrolysis of biosolids would be a solution, as it produces a useful biochar with reduced levels of PFAS and other contaminants [25].…”

Section: Introductionmentioning

confidence: 99%

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Biosolids-Derived Biochar Improves Biomethane Production in the Anaerobic Digestion of Chicken Manure

Hassan,

Ngo,

Khudur

et al. 2023

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Anaerobic digestion has attracted great interest for use in the management of organic wastes and the production of biomethane. However, this process is facing challenges, such as a high concentration of ammonia nitrogen, which affects the methanogenesis process and, thus, the production of methane. This study investigates the use of biosolid-derived biochar for mitigating ammonia stress and improving methane production during the anaerobic digestion of chicken manure, using both pristine biochar and biochar modified with a potassium hydroxide (KOH) solution. Batch mesophilic anaerobic digestion (37 °C) was carried out over 18 days. When compared to chicken-manure-only controls, a significant increase in methane formation was observed in the digesters amended with biochar and KOH-modified biochar, producing 220 L kg−1 volatile solids (VSs) and 262 L kg−1 VSs of methane, respectively, compared to 139 L kg−1 VSs from the control digesters. The use of biochar and KOH-modified biochar resulted in a significant reduction of 8 days in the lag phase. The total ammonia nitrogen (TAN) concentration was reduced in the digesters with biochar and KOH-modified biochar by 25% and 35.5%, respectively. The quantitative polymerase chain reaction (QPCR) data revealed that the number of 16S rRNA gene copies was around 50,000 and 41,000 times higher in the biochar and KOH-modified biochar digesters, respectively, compared to the control digesters on day 18. The taxonomic profiles indicated that the BC and KOH-BC digesters contained a mixture of methanogenic pathways, including acetoclastic (Methanosaetaceae), hydrogenotrophic (Methanosarcinaceae), and methylation (Methanofastidiosaceae). This mix of pathways suggests a more robust archaeal community and, hence, more efficient methanogenesis. The results show that the addition of biosolids biochar enhances anaerobic digestion, mitigates ammonia stress to methanogens, and significantly increases biogas production.

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Section: Biochar Treatment and Characterisationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biosolids-Derived Biochar Improves Biomethane Production in the Anaerobic Digestion of Chicken Manure

Hassan,

Ngo,

Khudur

et al. 2023

Resources

Self Cite

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show abstract

“…Fourier Transformed Infrared (FTIR) Spectroscopy was used for the assessment of the surface chemical functional groups of raw and KOH-modi ed biochar over the wavebands of 4000-650 cm − 1 . The surface area of the biochar was analysed using Brunauer-Emmett-Teller (BET) surface area analysis using a Micrometritics TriStar II instrument, according to Hakeem et al (2022). Inductively Coupled Plasma Mass Spectrometry (ICP-MS) was used to measure the concentration of the trace metal in the biochar following acid digestion according to method 3050B (Epa, 1996).…”

Section: Biochar Treatment and Characterisationmentioning

confidence: 99%

“…In 2021, Australia produced 349,000 tonnes of dry biosolids which was 16% higher than the biosolids' production in 2010 (300,000 tonnes) (Australian Water Association, 2021). The presence of contaminants such as per-and poly-uoroalkyl (PFAs) substances and heavy metals in biosolids threatens their land-application in agriculture, which is the largest end-user of biosolids (Hakeem et al, 2022). Pyrolysis of biosolids would be a solution as it produces a useful biochar with reduced levels of PFAS and other contaminants (Thoma et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

The Impact of Biosolids Biochar on Biomethane Production from the Anaerobic Digestion of Chicken Manure

Hassan¹,

Ngo²,

Khudur³

et al. 2023

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Microbiological aspects of dewatering sewage sludge by removing extracellular polymeric substances during the bioleaching process: a review

Gonçalves

Nascimento

Duarte

2023

Int. J. Environ. Sci. Technol.

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Mild sulphuric acid pre-treatment for metals removal from biosolids and the fate of metals in the treated biosolids derived biochar

Cited by 22 publications

References 81 publications

Biosolids-Derived Biochar Improves Biomethane Production in the Anaerobic Digestion of Chicken Manure

Biosolids-Derived Biochar Improves Biomethane Production in the Anaerobic Digestion of Chicken Manure

The Impact of Biosolids Biochar on Biomethane Production from the Anaerobic Digestion of Chicken Manure

Microbiological aspects of dewatering sewage sludge by removing extracellular polymeric substances during the bioleaching process: a review

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