Effects of functional-membrane covering technique on nitrogen succession during aerobic composting: Metabolic pathways, functional enzymes, and functional genes

Xiong, Jinpeng; Su, Ya; He, Xueqin; Han, Lujia; Guo, Jianbin; Qiao, Wei; Huang, Guangqun

doi:10.1016/j.biortech.2022.127205

Cited by 29 publications

(4 citation statements)

References 43 publications

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“…After the first turning, the composting plies with a temperature above 65 °C accounted for 23.70% and 17.04% in the covered group. This indicated that the membrane cover could improve the fermentation efficiency of the composting piles to a certain extent by increasing the oxygen utilization rate [ 11 ]. In summary, the membrane covering influenced the composting temperature by the high efficiency of fermentation during the high-temperature period, smaller differences in spatial distribution of temperature, and heat dissipation rate at the bottom.…”

Section: Resultsmentioning

confidence: 99%

“…In Figure 5 d, the NH 3 emission rate in the covered group was significantly higher than that in the non-covered group. Xiong et al [ 11 ] indicated that the increased emission of ammonia gas by a membrane covering may be related to the formation of a water film under the membrane. It may be explained that ammonium easily dissolves in the water film on the inner layer of the membrane.…”

Section: Resultsmentioning

confidence: 99%

“…The membrane “swells” due to the difference in pressure inside and outside the membrane. There is a micro-positive pressure environment in the composting pile under the membrane, which may help oxygen penetrate the composting particles, improve the local anaerobic condition, reduce GHGs emissions, and improve the efficiency of composting [ 9 , 10 , 11 ]. Ma et al [ 9 ] demonstrated that functional membranes decreased the possibility of global warming by 16.97% and improved the relative abundance of Actinobacteria .…”

Section: Introductionmentioning

confidence: 99%

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Large Semi-Membrane Covered Composting System Improves the Spatial Homogeneity and Efficiency of Fermentation

Sun

Huang

et al. 2022

IJERPH

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Homogenous spatial distribution of fermentation characteristics, local anaerobic conditions, and large amounts of greenhouse gas (GHGs) emissions are common problems in large-scale aerobic composting systems. The aim of this study was to examine the effects of a semi-membrane covering on the spatial homogeneity and efficiency of fermentation in aerobic composting systems. In the covered group, the pile was covered with a semi-membrane, while in the non-covered group (control group), the pile was uncovered. The covered group entered the high-temperature period earlier and the spatial gradient difference in the group was smaller compared with the non-covered group. The moisture content loss ratio (5.91%) in the covered group was slower than that in the non-covered group (10.78%), and the covered group had a more homogeneous spatial distribution of water. The degradation rate of organic matter in the non-covered group (11.39%) was faster than that in the covered group (10.21%). The final germination index in the covered group (85.82%) was higher than that of the non-covered group (82.79%) and the spatial gradient difference in the covered group was smaller. Compared with the non-covered group, the oxygen consumption rate in the covered group was higher. The GHG emissions (by 30.36%) and power consumption in the covered group were reduced more significantly. The spatial microbial diversity of the non-covered group was greater compared with the covered group. This work shows that aerobic compost covered with a semi-membrane can improve the space homogeneity and efficiency of fermentation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Large Semi-Membrane Covered Composting System Improves the Spatial Homogeneity and Efficiency of Fermentation

Sun

Huang

et al. 2022

IJERPH

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“…Membrane composting is a relatively mature technology that can effectively reduce air pollution caused by composting [ 54 ]. Xiong et al [ 55 ] observed that applying the functional membrane-covering technique (FMCT) can reduce N 2 O emission by 16.44–41.15% because the FMCT fixes the inner pressure to the micro-positive pressure, maintaining an appropriate temperature while ensuring aerobic conditions and oxygen utilization efficiency. Nitrifying bacteria are extremely sensitive to high temperatures, so denitrification and N 2 O production may be simultaneously significantly inhibited [ 56 ].…”

Section: Control Strategy For Gaseous Emissionsmentioning

confidence: 99%

Measures for Controlling Gaseous Emissions during Composting: A Review

Chen

et al. 2023

IJERPH

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Composting is a promising technology for treating organic solid waste. However, greenhouse gases (methane and nitrous oxide) and odor emissions (ammonia, hydrogen sulfide, etc.) during composting are practically unavoidable, leading to severe environmental problems and poor final compost products. The optimization of composting conditions and the application of additives have been considered to mitigate these problems, but a comprehensive analysis of the influence of these methods on gaseous emissions during composting is lacking. Thus, this review summarizes the influence of composting conditions and different additives on gaseous emissions, and the cost of each measure is approximately evaluated. Aerobic conditions can be achieved by appropriate process conditions, so the contents of CH4 and N2O can subsequently be effectively reduced. Physical additives are effective regulators to control anaerobic gaseous emissions, having a large specific surface area and great adsorption performance. Chemical additives significantly reduce gaseous emissions, but their side effects on compost application must be eliminated. The auxiliary effect of microbial agents is not absolute, but is closely related to the dosage and environmental conditions of compost. Compound additives can reduce gaseous emissions more efficiently than single additives. However, further study is required to assess the economic viability of additives to promote their large-scale utilization during composting.

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Effect of different multichannel ventilation methods on aerobic composting and vegetable waste gas emissions

Li,

Cai,

Cao

et al. 2023

Environ Sci Pollut Res

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Effects of functional-membrane covering technique on nitrogen succession during aerobic composting: Metabolic pathways, functional enzymes, and functional genes

Cited by 29 publications

References 43 publications

Large Semi-Membrane Covered Composting System Improves the Spatial Homogeneity and Efficiency of Fermentation

Large Semi-Membrane Covered Composting System Improves the Spatial Homogeneity and Efficiency of Fermentation

Measures for Controlling Gaseous Emissions during Composting: A Review

Effect of different multichannel ventilation methods on aerobic composting and vegetable waste gas emissions

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