Insight to nitrification during cattle manure-maize straw and biochar composting in terms of multi-variable interaction

Deng, Lei; Zhao, Yan; Zhang, Jizhou; Bello, Ayodeji; Sun, Yu; Han, Yuhui; Wang, Bo; Egbeagu, Ugochi Uzoamaka; Jong, Chol; Xu, Xiuhong

doi:10.1016/j.biortech.2020.124572

Cited by 25 publications

(2 citation statements)

References 45 publications

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“…Nitrification is a critical step to accelerate conversion of ammonium nitrogen to oxidized N and reduce ammonia volatilization. Ammoxidation is the first and rate-limiting step of nitrification, including two reactions, wherein NH3/NH4 + forms hydroxylamine by ammonia monooxygenase and then NO2 − is formed by hydroxylamine oxidoreductase [73] . Given that nitrifying microorganisms are sensitive to temperature, their growth is inhibited by high temperature in composting, so that nitrification is weak in the thermophilic phase of composting [74] .…”

Section: Effect Of Exogenous Additives On Nitrogen Retention In Compostmentioning

confidence: 99%

Effect of Exogenous Additives on Heavy Metal Passivation and Nitrogen Retention in Pig Manure Composting

WANG,

SUN,

WANG

et al. 2023

Front. Agr. Sci. Eng.

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Section: Effect Of Exogenous Additives On Nitrogen Retention In Compostmentioning

confidence: 99%

Effect of Exogenous Additives on Heavy Metal Passivation and Nitrogen Retention in Pig Manure Composting

WANG,

SUN,

WANG

et al. 2023

Front. Agr. Sci. Eng.

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“…For instance, mounted evidence indicates that the AOA dominates the soil ecosystems, displaying a greater quantity and a richer diversity of communities than the AOB [18]. However, previous studies have found that the AOB members are the predominant contributors to nitrification in the composting systems [19,20] and constructed wetland systems [21] compared to AOA members. Even though the detailed habitats and functions of AOA and AOB in ecological systems have been contested, the dominant status difference between AOA and AOB influences the quality of excess effluent sludge still needs to be well explored.…”

Section: Introductionmentioning

confidence: 99%

Biochar Amendment in Vermi-Wetland for Enhancing Nitrification during Excess Sludge Recycling

Bai,

Twagirayezu,

Wang

et al. 2023

Sustainability

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Vermi-wetland is a sustainable technology for recycling excess sludge in small-town areas. Although biochar (BC) amendment into the vermi-wetland could considerably boost the effectiveness of treating sludge, its impact on the nitrogen transformation in vermi-wetland remains unclear. Hence, this study aimed to explore the mechanism and performance of BC amendment into the vermi-wetland for enhancing nitrogen transformation during excess sludge recycling. The semi-aquatic plant Acorus calamus and the earthworm Eisenia fetida were planted in the designed vertical vermi-reactor, with corncob BC added to the upper and lower layers of one vermi-reactor, in comparison with the vermi-reactor without BC. The vermi-reactor with BC significantly lowered (p < 0.05) ammonia nitrogen (NH4+-N) and nitrite nitrogen (NO2−-N) in the effluent by 1.63 and 4.85-fold, respectively, and increased considerably nitrate nitrogen (NO3−-N) in the effluent by 1.5-fold. The numbers of ammonia-oxidizing bacteria (AOB) and archaea (AOA) in the vermi-reactor with BC were greatly enriched by 6 and 1.42-fold, compared with their counterparts (p < 0.05). Moreover, nirS and nirK gene copies in the vermi-reactor with BC were considerably improved (p < 0.05) by 2.03 and 1.82-fold, respectively. BC significantly enhanced the growth of earthworms by 6.92-fold and promoted plant growth by 1.28-fold. In addition, the AOB members like Nitrosomonas and Nitrosospira and the AOA members like Crenarchaeota and Thaumarchaeota cohabited in BC. Overall, these results suggest that a vermi-reactor amended with BC could enhance the nitrification processes of excess sludge, thereby improving the treatment performance of vermi-wetland.

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Dissipation and risk assessment of polycyclic aromatic hydrocarbons in industrial-scale biochar composting

Chen¹,

Shen

Liang³

2022

J Soils Sediments

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Insight to nitrification during cattle manure-maize straw and biochar composting in terms of multi-variable interaction

Cited by 25 publications

References 45 publications

Effect of Exogenous Additives on Heavy Metal Passivation and Nitrogen Retention in Pig Manure Composting

Effect of Exogenous Additives on Heavy Metal Passivation and Nitrogen Retention in Pig Manure Composting

Biochar Amendment in Vermi-Wetland for Enhancing Nitrification during Excess Sludge Recycling

Dissipation and risk assessment of polycyclic aromatic hydrocarbons in industrial-scale biochar composting

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