Exploration of bacterial communities in products after composting rural wastes with different components: Core microbiome and potential pathogenicity

Xu, Yan; Gao, Yi; Tan, Lu; Wang, Qiang; Li, Qian; Wei, Xiaocheng; Liu, Fang; Li, Ye; Zheng, Xiangqun

doi:10.1016/j.eti.2021.102222

Cited by 13 publications

(9 citation statements)

References 29 publications

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“…The removal of pathogenic bacteria in the mixed composting system was more effective than previously reported, where a large number of pathogens still remain after composting (Xu et al, 2022). Apparently, the pathogenic bacteria Bacillaceae-Bacillus were significantly reduced by 71.21%.…”

Section: Pathogensmentioning

confidence: 57%

“…The raw material ratio of compost referred to the optimal ratio in the previous study (Gao et al, 2021), in which the ratio of swine manure, human feces, and rice straw were 0.40: 0.15: 0.45. The initial moisture content of the mixed raw material is set at about 60 wt% and the turning frequency of compost is referred to in the study by Xu et al (2022).…”

Section: Composting Process and Samplingmentioning

confidence: 99%

“…It is reported that Bacillus can cause an array of infections, from ear infections to meningitis, and urinary tract infections to septicemia. In most cases, they occur as secondary infections in immuno-deficient hosts or otherwise compromised hosts (Xu et al, 2022). Three pathogenic fungi, Aspergillus, Alternaria, and Fusarium were effectively killed, especially Aspergillus with a reduction of 98.76% (Figure 5).…”

Section: Pathogensmentioning

confidence: 99%

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Full-Scale of a Compost Process Using Swine Manure, Human Feces, and Rice Straw as Feedstock

Gao

Zhang

Tan

et al. 2022

Front. Bioeng. Biotechnol.

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Regarding the composting of rural waste, numerous studies either addressed the composting of a single waste component or were conducted at a laboratory/pilot scale. However, far less is known about the mixed composting effect of multi-component rural waste on a large scale. Here, we examined nutrient transformation, maturity degree of decomposition, and succession of microbial communities in large-scale (1,000 kg mixed waste) compost of multi-component wastes previously optimized by response models. The results showed that multi-component compost can achieve the requirement of maturity and exhibit a higher nutritional value in actual compost. It is worth noting that the mixed compost effectively removed pathogenic fungi, in which almost no pathogenic fungi were detected, and only two pathogenic bacteria regrown in the cooling and maturation stages. Structural equation models revealed that the maturity (germination index and the ratio of ammonium to nitrate) of the product was directly influenced by compost properties (electrical conductivity, pH, total organic carbon, moisture, temperature, and total nitrogen) compared with enzymes (cellulase, urease, and polyphenol oxidase) and microbial communities. Moreover, higher contents of total phosphorus, nitrate-nitrogen, and total potassium were conducive to improving compost maturity, whereas relatively lower values of moisture and pH were more advantageous. In addition, compost properties manifested a remarkable indirect effect on maturity by affecting the fungal community (Penicillium and Mycothermus). Collectively, this evidence implies that mixed compost of multi-component rural waste is feasible, and its efficacy can be applied in practical applications. This study provides a solution for the comprehensive treatment and utilization of rural waste.

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Section: Pathogensmentioning

confidence: 57%

Section: Composting Process and Samplingmentioning

confidence: 99%

Section: Pathogensmentioning

confidence: 99%

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Full-Scale of a Compost Process Using Swine Manure, Human Feces, and Rice Straw as Feedstock

Gao

Zhang

Tan

et al. 2022

Front. Bioeng. Biotechnol.

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“…However, it is widely known that organic fertilizer application may introduce exogenous pathogens. Potential pathogenic bacteria such as Pseudomonas , Flavobacterium , and Bacillus were detected in more than 13% of organic fertilizer products ( Xu et al, 2022 ). Our results showed that the combined application of organic manure with chemical fertilizers significantly suppressed R. solanacearum compared to chemical fertilizers alone.…”

Section: Discussionmentioning

confidence: 99%

Synergistic effects of rhizosphere effect and combined organic and chemical fertilizers application on soil bacterial diversity and community structure in oilseed rape cultivation

Wang,

Qin,

Zhang

et al. 2024

Front. Microbiol.

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The combined application of chemical and organic fertilizers has been recognized to enhance soil fertility and foster the soil microbial ecosystem. However, the optimal ratio of chemical and organic fertilizers in oilseed rape cultivation is still uncertain, and the role of rhizosphere effect is still unclear. Thus, this study aimed to elucidate the impacts of varying ratios of chemical and organic fertilizers on the structure and potential functionalities of rhizosphere and non-rhizosphere soil microbial communities. The interplay of microbial communities with soil properties and oilseed rape root exudates was investigated in controlled pot cultivations receiving varying ratios of chemical and organic fertilizers. Results indicated clear segregation in the soil bacterial community, influenced by both fertilization treatments and rhizosphere effects. The bacterial community structure significantly correlated with nitrate nitrogen, organic acids, and dissolved organic carbon (DOC) content. Rhizosphere effects led to increased bacteria abundance, reduced diversity, and decreased network stability. Notably, F3 treatment receiving 25% chemical and 75% organic fertilizers showed a significantly higher abundance at 1.43 × 1011 copies g−1 dry soil, accompanied by increased species and genetic diversity, and ecological network complexity. This treatment also yielded the highest aboveground biomass of oilseed rape. However, the application of organic fertilizers also increased the risk of plant pathogenicity. This study reveals the impact of fertilizers and rhizosphere effects on soil microbial community structure and function, shedding light on the establishment of more effective fertilization schemes for oilseed rape agriculture.

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“…In addition, clostridium (8.86%) increased in abundance. Bacillus clostridiales belongs to the firmicutes – clostridiaceae, with sporulation, and is a very unique species in nature, mainly fo und in soil, human and animal intestines and spoilage ( Xu et al, 2022 ). As the pile temperature started to the abundance of Clostridium spp.…”

Section: Discussionmentioning

confidence: 99%

Effects of different microbial agents on bedding treatment of ectopic fermentation of buffalo manure

et al. 2022

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IntroductionThe rapid development of the farming industry has increased the amount of manure produced by livestock and poultry, causing increasingly prominent environmental pollution problems. In recent years, due to the increase in conventional bedding material costs, an increasing number of farmers choose to use harmless recycled manure as bedding. Manure bedding treatment of farms can not only solve the problem of manure pollution, but also resource utilization of manure and cost savings.MethodsThis study compared the effects of five microbial agents (Microbial agents A, B, C, E, F) on buffalo manure bedding treatment by testing the temperature, moisture content, pH, microbial bacteria distribution of buffalo manure ectopic fermentation, and screened the lowest cost and most effective agent. The changes of microbial bacteria distribution in different periods of bedding treatment were also detected.ResultsAgent A was eliminated because of poor fermentation effect and low fermentation temperature, which could not achieve the effect of harmless treatment. The other four agents of bacteria achieved a harmless effect, but the bedding treatment effect of agent F was significantly better than agent E, B, and C. In terms of the cost of agents: the cost of agent F required for fermenting 100m³ buffalo manure was the lowest, 1000yuan, followed by E (1200yuan), C (1750yuan), and B (1980yuan). In the process of ectopic fermentation bedding treatment of buffalo manure, Firmicutes, Bacteroidetes, Proteobacteria, Actinobacteria, and Chloroflexi were the major bacteria used. The process was divided into three periods; the heating period - high temperature period - cooling period, the high temperature period could reach more than 75°C, and a large number of pathogenic bacteria and harmful bacteria, and other miscellaneous bacteria in the pile were degraded, their species diversity was reduced, and the structure of bacterial flora had significant differences in different treatment periods. In conclusion, this study has provided a guide for the resource utilization of manure in cattle farms and the reduction of manure pollution to the environment.

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Exploration of bacterial communities in products after composting rural wastes with different components: Core microbiome and potential pathogenicity

Cited by 13 publications

References 29 publications

Full-Scale of a Compost Process Using Swine Manure, Human Feces, and Rice Straw as Feedstock

Full-Scale of a Compost Process Using Swine Manure, Human Feces, and Rice Straw as Feedstock

Synergistic effects of rhizosphere effect and combined organic and chemical fertilizers application on soil bacterial diversity and community structure in oilseed rape cultivation

Effects of different microbial agents on bedding treatment of ectopic fermentation of buffalo manure

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