Combined microbial transcript and metabolic analysis reveals the different roles of hydrochar and biochar in promoting anaerobic digestion of waste activated sludge

Shi, Zhi-Jian; Usman, Muhammad; He, Jun; Chen, Huihui; Zhang, Shicheng; Luo, Gang

doi:10.1016/j.watres.2021.117679

Cited by 87 publications

(23 citation statements)

References 42 publications

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“…The metabolomic analysis also showed that the alterations of metabolites associated with fatty acids and amino acids metabolism induced by hydrochar were stronger than those of biochar (Fig. 6b) (Shi et al 2021b).…”

Section: Biochar As Additives In Anaerobic Digestionmentioning

confidence: 89%

“…Biochar has been identified as an effective additive to boost and improve AD performance (Qi et al 2021c;Shi et al 2021b;Sugiarto et al 2021a). It could significantly assist in shortening the lag phase of organic biodegradation, improving the production of methane (CH 4 ) and hydrogen (H 2 ).…”

Section: Biochar As Additives In Anaerobic Digestionmentioning

confidence: 99%

“…Such improvement in AD process efficiency with biochar amendment could be attributed to buffering capacity, adsorption of inhibitory substances (e.g., ammonia nitrogen (NH 4 + -N) and volatile fatty acids)), and accelerated direct interspecies electron transfer (DIET) (Ambaye et al 2021;Bu et al 2021;Qi et al 2021c). Bu et al (2021) reported that biochar significantly boosted H 2 production from pretreated sugarcane bagasse by implementing efficient enrichment (Shi et al 2021b) and colonization of functional bacteria and activating extracellular electron transfer between functional bacteria (Fig. 6a).…”

Section: Biochar As Additives In Anaerobic Digestionmentioning

confidence: 99%

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Bibliometric analysis of biochar research in 2021: a critical review for development, hotspots and trend directions

Singh

Wang

et al. 2023

Biochar

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As a bioproduct from the thermal decomposition of biomass, biochar has various applications in diversified field. In this study, a bibliometric analysis was conducted to visualize the current research status and trends of biochar research. A total of 5535 documents were collected from the Web of Science Core Collection and subjected to visualization analysis for the biochar field's development in 2021 with CiteSpace software. The visual analysis results demonstrate that the number of publications expanded dramatically in 2021, and the growth trend would continue. China and USA were the most contributing countries in biochar research in terms of the number of publications. Based on the keyword co-occurrence analyses, “Biochar for toxic metal immobilization”, “Biochar-based catalyst for biofuel production”, “Biochar for global climate change mitigation”, “Biochar for salinity and drought stress amelioration”, “Biochar amendment in composting”, and “Biochar as additives in anaerobic digestion” were the main research trends and hotspots in this field in 2021. This indicates that the biochar research was multidisciplinary. Regarding the research hotspots, the employment of biochar as heterogeneous catalysts for biofuel production gained great attention in 2021. On the contrary, bioremediation using functional bacteria immobilized on biochar and biochar-assisted advanced oxidation process were well-studied but with less frequency than other topics in 2021. Furthermore, the future research was proposed for green and sustainable applications of biochar. This review provides a comprehensive overview of the research frontiers, the evolution of research hotspots, and potential future research directions in the biochar field. Graphical Abstract

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Section: Biochar As Additives In Anaerobic Digestionmentioning

confidence: 89%

Section: Biochar As Additives In Anaerobic Digestionmentioning

confidence: 99%

Section: Biochar As Additives In Anaerobic Digestionmentioning

confidence: 99%

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Bibliometric analysis of biochar research in 2021: a critical review for development, hotspots and trend directions

Singh

Wang

et al. 2023

Biochar

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“…et al, 2021;Zhang et al, 2022), dyes Lv et al, 2022), gases (Sultana et al, 2021), antibiotics (Qu et al, 2021), phenolic compounds (Marx et al, 2021;Pauletto et al, 2021), and so forth. In addition to being utilized in adsorption processes as an adsorbent, hydrochar is also used in other applications such as promoting anaerobic digestion in activated sludge (He et al, 2021;Shi et al, 2021), composite material applications (Nizamuddin et al, 2021), hydrogen gas production (Lin et al, 2021), biofuel applications (Zhang Z. et al, 2021), chemical sensing applications (Espro et al, 2021), and others.…”

Section: Hydrothermal Carbonization (Htc) Processmentioning

confidence: 99%

Recent methods in the production of activated carbon from date palm residues for the adsorption of textile dyes: A review

Alharbi

Hameed

Alotaibi

et al. 2022

Front. Environ. Sci.

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Textile dyes are organic compounds that can pose an environmental threat if not properly treated. They can cause many problems ranging from human health, ecosystem disturbances, and the reduction of the esthetic value of water bodies. The adsorption process using activated carbon (AC) has been proven to be effective in treating dyes in wastewater. However, the production of AC is limited by the non-renewables and relatively expensive precursor of coal. Date palm residues (DPRs) provide a good alternative for AC’s precursor due to their continuous supply, availability in a large amount, and having good physiochemical properties such as high oxygen element and fixed carbon. This study provides a review of the potential of date palm residues (DPRs) as AC in adsorbing textile dyes and the recent technological advances adopted by researchers in producing DPR-based AC. This review article focuses solely on DPR and not on other biomass waste. This study presents a background review on date palms, textile dyes, biochar, and AC, followed by production methods of AC. In the literature, DPR was carbonized between 250 and 400°C. The conventional heating process employed an activation temperature of 576.85–900°C for physical activation and a maximum of 800°C for physicochemical activation. Chemical agents used in the chemical activation of DPR included NaOH, KOH, ZnCl2, H3PO4, and CaCl2. The maximum surface area obtained for DPR-AC was 1,092.34 and 950 m2/g for physical and chemical activation, respectively. On the other hand, conditions used in microwave heating were between 540 and 700 W, which resulted in a surface area of 1,123 m2/g. Hydrothermal carbonization (HTC) utilized carbonization temperatures between 150 and 250°C with pressure between 1 and 5 MPa, thus resulting in a surface area between 125.50 and 139.50 m2/g. Isotherm and kinetic models employed in the literature are also discussed, together with the explanation of parameters accompanied by these models. The conversion of DPR into AC was noticed to be more efficient with the advancement of activation methods over the years.

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“…Various materials can serve as feedstock (wood residues (Nirmaladevi et al, 2021), organic waste (Liu et al, 2021), etc.). The use of biochar as a soil conditioner improves soil fertility (Brewer and Brown, 2012), water retention (Werdin et al, 2021) and wastewater treatment (Kamali et al, 2021) and affects microorganism's life (Shi et al, 2021). Additionally, the particle size of biochar must be taken into consideration, e.g., fine particles increase water retention (Gluba et al, 2021), on the other hand, coarse particles increase plant available water (Werdin et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

The effect of biochar application on soil properties and growth of the model plant Zea mays

et al. 2021

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The classic way of land cultivation means the use of inorganic fertilizers that are salts that dissolve rapidly in a short time and improve soil fertility. This process negatively affects soil salinity and the life of microorganisms. The use of biochar as a soil conditioner is a promising solution. The aim of the work is to enrich the properties of less fertile soils and to enhance the growth of the model plant Zea mays (corn) by biochar application. We used four different soil types commonly spread in the Czech Republic – regosol, chernozem, cambisol and fluvisol representing a broad range of organic matter content. Also, we applied two different EBC (The European Biochar Certificate) certified biochars for use in agriculture. Corn seeds were germinated and cultivated for 3 months in repeated plant life cycles. Soils and biochar samples were characterized before and after cultivation by TGA, EA, BET, SEM, extraction of organic matter. The effect of biochar application was observed continuously through the measurement of plant height, the number of leaves and cobs. After the finalization of cultivation experiments, the dry mass of individual plants was measured, and root image analysis of every plant was performed. Fluvisol and cambisol have much higher organic matter content than regosol and chernozem. The application of biochar had the most significant impact on regosol regardless of the application dose; these results are in good agreement with the root image analysis. Furthermore, plants in soils treated with biochar had more corn cobs. The analysis on biochar samples showed the continual leaching of both organic and inorganic molecules from biochar to surrounding soil, which is crucial for its possible use as a soil conditioner and confirms the long-timescale positive effect on soil properties.

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Combined microbial transcript and metabolic analysis reveals the different roles of hydrochar and biochar in promoting anaerobic digestion of waste activated sludge

Cited by 87 publications

References 42 publications

Bibliometric analysis of biochar research in 2021: a critical review for development, hotspots and trend directions

Bibliometric analysis of biochar research in 2021: a critical review for development, hotspots and trend directions

Recent methods in the production of activated carbon from date palm residues for the adsorption of textile dyes: A review

The effect of biochar application on soil properties and growth of the model plant Zea mays

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