Biofilters and bioretention systems: the role of biochar in the blue-green city concept for stormwater management

Premarathna, Shashikala Dilrukshi; Kumar, Manish; Varjani, Sunita; Mickan, Bede S.; Novo, Luís A. B.; Show, Pau Loke; Lau, Sie Yon; Vithanage, Meththika

doi:10.1039/d3ew00054k

Cited by 5 publications

(1 citation statement)

References 144 publications

(236 reference statements)

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“…This pyrolyzed carbon material has proven to be an excellent additive for several applications because of its widespread availability, low cost of production, and environmental friendliness [13]. Depending on its properties, the affinity of biochar towards organic and inorganic contaminants varies [14]. Several structural and physiochemical properties enable biochar to mitigate NH 3 inhibition, including richness in surface functional groups, cation exchange capacity (CEC), and high adsorption and porosity [3,15].…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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

Hassan,

Ngo,

Khudur

et al. 2023

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Exploring denitrification and anammox processes in the saturated zone of passively operated vegetated biofiltration systems

Zhang,

Prodanovic,

Zhao

et al. 2023

Environ. Sci.: Water Res. Technol.

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Biochar as bioretention systems for water quality improvement in Malaysia

Selvarajoo,

Balakrishnan,

Aman

et al. 2023

E3S Web Conf.

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Rapid urbanization and constant development of infrastructure in the civil engineering community has accelerated in the past decades. However, there has been a reduction of permeable surfaces for rainwater and surface runoff to escape, raising concerns regarding flooding and water quality especially in Malaysia where the tropical climate and heavy rainfall applies pressure on the bioretention systems. To lessen the issue, this paper will be looking into biochar’s benefits in bioretention systems focussing on the type of biochar which will be most suited in improving water quality. In particular, two types of biochar were compared such as rice husk biochar and palm biochar to be tested as bioretention system and different water samples were run through them. Various water quality parameter tests were conducted to evaluate biochar’s performance in reducing pollutants and contaminants from the water samples and thus enable to draw a conclusion on which is the most effective for bioretention use. With a deeper understanding of biochar’s capabilities and limitations, stormwater management strategies can be improved to make the construction industry more sustainable.

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Biofilters and bioretention systems: the role of biochar in the blue-green city concept for stormwater management

Abstract: The main aim of the Blue-Green City concept is the reduction of the adverse impacts of stormwater by recreating the natural water cycle with the aid of green infrastructure in...

Cited by 5 publications

References 144 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

Exploring denitrification and anammox processes in the saturated zone of passively operated vegetated biofiltration systems

Biochar as bioretention systems for water quality improvement in Malaysia

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