Functional keystone drive nitrogen conversion during different animal manures composting

Li, Huiying; Wei, Zimin; Song, Chen; Chen, Xiaomeng; Zhang, Ruju; Liu, Yumeng

doi:10.1016/j.biortech.2022.127721

Cited by 16 publications

(3 citation statements)

References 46 publications

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“…Second, with NO 2 − oxidized to NO 3 − by nitrite oxidoreductase, incomplete denitrification transforms a part of the NO 3 − into N 2 O. A small amount of NO 3 − is reduced to NO 2 − by the nitrate reductase (pathway ③) [ 31 ]. Third, denitrifying bacteria transform the rest of the NO 2 − into NO by nitrite reductase and further convert it to N 2 O by nitric oxide reductase (pathway ④) [ 32 ]; With the above N 2 O emitted into the air, the rest is completely denitrified to N 2 by nitrous oxide reductase, so the nitrogen metabolic pathway during composting is over (pathway ⑤) [ 33 ].…”

Section: The Theory Of Gaseous Emission In Compostingmentioning

confidence: 99%

Section: The Theory Of Gaseous Emission In Compostingmentioning

confidence: 99%

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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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Section: The Theory Of Gaseous Emission In Compostingmentioning

confidence: 99%

Section: The Theory Of Gaseous Emission In Compostingmentioning

confidence: 99%

Measures for Controlling Gaseous Emissions during Composting: A Review

Chen

et al. 2023

IJERPH

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“…Sphingomonas has the capacity to fix atmospheric nitrogen [55]. Devosia has been known for its capacity for nitrification and denitrification, playing an important role in nitrogen transformation [56]. Clostridium, which is commonly found in manure, and has a capacity to fix nitrogen, takes part in fermentation and decomposes cellulose.…”

Section: Diversity Of Bacteriamentioning

confidence: 99%

Microbial Community Response to Various Types of Exogenous Organic Matter Applied to Soil

Siebielec,

Marzec-Grządziel,

Siebielec

et al. 2023

IJMS

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Recycling of solid biowaste and manure would reduce the dependence of agriculture on synthetic products. Most of the available studies on the effects of exogenous organic matter (EOM) application to soil were focused on nutrients and crop yield, with much less attention to microbiological processes in soil, especially using modern molecular methods. The aim of this study was to evaluate the effects of various types of manure, sewage sludge and bottom sediment on the biochemical activity and biodiversity of soil and plant yield in a pot experiment. The soil was treated with a range of EOM types: six types of manure (cattle, pig, goat, poultry, rabbit and horse manure; two bottom sediments (from urban and rural systems); and two types of municipal sewage sludge. All EOMs stimulated dehydrogenases activity at a rate of 20 t ha−1. Alkaline phosphatase was mostly stimulated by poultry manure and one of the sludges. In general, the two-fold greater rate of EOMs did not further accelerate the soil enzymes. The functional diversity of the soil microbiome was stimulated the most by cattle and goat manure. EOMs produce a shift in distribution of the most abundant bacterial phyla and additionally introduce exogenous bacterial genera to soil. Poultry and horse manure introduced the greatest number of new genera that were able to survive the strong competition in soil. EOMs differentiated plant growth in our study, which was correlated to the rate of nitrate release to soil. The detailed impacts of particular amendments were EOM-specific, but in general, no harm for microbial parameters was observed for manure and sludge application, regardless of their type. There was also no proof that the PAH and pesticide contents measured in manure or sludge had any effect on microbial activity and diversity.

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