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Evaluating the Role of Pyrochar and Hydrochar in Biological Denitrification under Carbon Source-Limiting Conditions
https://orcid.org/0000-0001-6781-770X
Due to the discrepancies in properties, the roles of pyrochar (PC) and hydrochar (HC) in biological denitrification are different and unclear. Therefore, the effects of PC and HC prepared from banana peel (BP), rice straw, and pine on denitrification under carbon source-limiting conditions were comparatively investigated. The results showed that the pyrolysis temperature of PC was inversely proportional to its performance. PC prepared at 900 °C significantly inhibited the denitrification due to the suppression of electron transfer, denitrifying enzymes, and microbial activity. Conversely, HC not only facilitated the electron production, transfer, and consumption but also enhanced the synergistic interactions of different microorganisms. When the influent contained 50 mg/L nitrate, the residual concentrations of nitrate and nitrite after 48 h were 1.06 and 0.00 mg/L, respectively, in the BPHC experiment, which were lower than those in the Blank experiment (11.08 and 4.34 mg/L). Microbial analysis revealed that Aliidiomarina, which favors nitrite accumulation, was enriched in the experiments with 900 °C PC, while Marinobacter, a typical nitrate-reducing bacterium, attained maximum abundance in the BPHC experiment (37.44%). The findings presented here may contribute to further elucidating the role of HC and PC in denitrification, thereby promoting their practical application in wastewater treatment.
Biochar optimizes the conventional nitrogen removal process and contributes to the control of nitrate pollution in the aquatic environment.
Evaluating the Role of Pyrochar and Hydrochar in Biological Denitrification under Carbon Source-Limiting Conditions
https://orcid.org/0000-0001-6781-770X
Due to the discrepancies in properties, the roles of pyrochar (PC) and hydrochar (HC) in biological denitrification are different and unclear. Therefore, the effects of PC and HC prepared from banana peel (BP), rice straw, and pine on denitrification under carbon source-limiting conditions were comparatively investigated. The results showed that the pyrolysis temperature of PC was inversely proportional to its performance. PC prepared at 900 °C significantly inhibited the denitrification due to the suppression of electron transfer, denitrifying enzymes, and microbial activity. Conversely, HC not only facilitated the electron production, transfer, and consumption but also enhanced the synergistic interactions of different microorganisms. When the influent contained 50 mg/L nitrate, the residual concentrations of nitrate and nitrite after 48 h were 1.06 and 0.00 mg/L, respectively, in the BPHC experiment, which were lower than those in the Blank experiment (11.08 and 4.34 mg/L). Microbial analysis revealed that Aliidiomarina, which favors nitrite accumulation, was enriched in the experiments with 900 °C PC, while Marinobacter, a typical nitrate-reducing bacterium, attained maximum abundance in the BPHC experiment (37.44%). The findings presented here may contribute to further elucidating the role of HC and PC in denitrification, thereby promoting their practical application in wastewater treatment.
Biochar optimizes the conventional nitrogen removal process and contributes to the control of nitrate pollution in the aquatic environment.
Evaluating the Role of Pyrochar and Hydrochar in Biological Denitrification under Carbon Source-Limiting Conditions
https://orcid.org/0000-0001-6781-770X
Due to the discrepancies in properties, the roles of pyrochar (PC) and hydrochar (HC) in biological denitrification are different and unclear. Therefore, the effects of PC and HC prepared from banana peel (BP), rice straw, and pine on denitrification under carbon source-limiting conditions were comparatively investigated. The results showed that the pyrolysis temperature of PC was inversely proportional to its performance. PC prepared at 900 °C significantly inhibited the denitrification due to the suppression of electron transfer, denitrifying enzymes, and microbial activity. Conversely, HC not only facilitated the electron production, transfer, and consumption but also enhanced the synergistic interactions of different microorganisms. When the influent contained 50 mg/L nitrate, the residual concentrations of nitrate and nitrite after 48 h were 1.06 and 0.00 mg/L, respectively, in the BPHC experiment, which were lower than those in the Blank experiment (11.08 and 4.34 mg/L). Microbial analysis revealed that Aliidiomarina, which favors nitrite accumulation, was enriched in the experiments with 900 °C PC, while Marinobacter, a typical nitrate-reducing bacterium, attained maximum abundance in the BPHC experiment (37.44%). The findings presented here may contribute to further elucidating the role of HC and PC in denitrification, thereby promoting their practical application in wastewater treatment.
Biochar optimizes the conventional nitrogen removal process and contributes to the control of nitrate pollution in the aquatic environment.
Evaluating the Role of Pyrochar and Hydrochar in Biological Denitrification under Carbon Source-Limiting Conditions
Chen, Shengjie (author) / He, Li (author) / Wang, Zhu (author) / Zhang, Shanshan (author) / Yao, Fubing (author) / Luo, Kun (author) / Li, Bo (author) / Li, Xiaoming (author) / Yang, Qi (author)
ACS ES&T Water ; 4 ; 5933-5943
2024-12-13
Article (Journal)
Electronic Resource
English
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