微纳米泡泡水添加在有氧堆肥过程中对成熟度和微生物群体的影响
Mingxiu Li1, Zhenlun Qin1, Manli Duan1
1State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China.
Chemosphere
|March 7, 2024
概括
微纳米气泡水 (MNBW) 增强了牛和草的有氧堆肥. 在MNBW中较高的溶氧水平加速了成熟,提高了堆肥质量,并促进了像Firmicutes这样有益的微生物群落.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 农业科学 农业科学
背景情况:
- 有氧堆肥对于废物管理和营养物质回收利用至关重要.
- 微生物社区的动态显著影响了堆肥的成熟和质量.
- 微纳米泡泡水 (MNBW) 提供了增强生物过程的潜力.
研究的目的:
- 为了研究微纳米泡泡水 (MNBW) 与不同水平的溶氧对牛和草的有氧堆肥的影响.
- 分析MNBW对堆肥成熟参数和微生物群落结构的影响.
- 确定MNBW生产优质堆肥的最佳条件.
主要方法:
- 用不同度的溶氧 (12-21 mg/L) 和对照 (9 mg/L) 处理MNBW的牛和草进行了堆肥试验.
- 通过监测温度,C/N比率和种子发芽指数 (GI) 来评估堆肥成熟度.
- 使用冗余分析分析分析了微生物社区组成,以确定影响社区结构的关键因素.
主要成果:
- 最高的溶氧水平 (21 mg/L) 导致了最大的堆肥温度 (64°C) 和提高了堆肥质量,与对照组相比,GI高15.1%.
- 所有处理都符合无害堆肥标准.
- 温度,C/N比率和pH值是影响微生物群体组成的重要因素,与Firmicutes和Actinobacteria正相关.
- 在Firmicutes中的细菌系Ammoniibacillus在高溶解氧气下丰富,加速了基质分解.
结论:
- MNBW的应用,特别是在较高的溶氧水平下,有效地增强了牛和草的有氧化堆肥.
- MNBW改变了微生物群落结构,促进热友细菌和加速堆肥成熟.
- 该研究表明,MNBW是提高堆肥质量和效率的有希望的技术.
更多相关视频
07:19Compost Microcosms as Microbially Diverse, Natural-like Environments for Microbiome Research in Caenorhabditis elegans
Published on: September 13, 2022
2.2K
07:56Author Spotlight: Unraveling the Mysteries of Terrestrial Anaerobic Microorganisms in Uncharted Environments by In Situ Culturing
Published on: January 12, 2024
908
相关概念视频
Environmental Applications of Microorganisms
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
Microenvironments
Microorganisms inhabit highly localized spaces known as microenvironments, which are defined by distinct physical and chemical characteristics. These include oxygen concentration, pH, temperature, light availability, and nutrient levels. The conditions within a microenvironment can differ markedly from those in the surrounding area and significantly influence microbial growth, metabolism, and community structure.Microenvironments often display sharp physicochemical gradients over small spatial...
Soil Microbial Ecology
Soil microbial ecology is defined by highly diverse, spatially structured communities that drive nutrient cycling, organic matter turnover, and overall ecosystem stability. Although a gram of soil can contain thousands of bacterial and archaeal taxa, the ecological processes they mediate are even more crucial for sustaining terrestrial life.Microhabitats and NichesSoil is a heterogeneous mixture of minerals, organic matter, water, and air. Microbes inhabit distinct microhabitats formed by...
Microbial Corrosion
Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...
Microbes and Climate Change
Microorganisms are pivotal agents in Earth's biogeochemical cycles, significantly influencing climate dynamics through their metabolic activities. These microbes modulate the levels of key greenhouse gases by both contributing to and helping mitigate climate change.Microbial Contributions to Greenhouse Gas EmissionsRising global temperatures accelerate microbial metabolism, which, in turn, speeds up the decomposition of organic matter. This process releases carbon dioxide (CO₂) through...
Bioreactor Controls-II
In aerobic fermentations, oxygen is vital for microbial growth and metabolite production. Since air comprises only about 20% oxygen and the gas is poorly soluble in water—just 9 ppm at 20°C—supplying sufficient oxygen becomes a critical challenge, especially in high-demand processes like yeast growth or citric acid production. Even a fully saturated broth may offer only a few seconds of oxygen availability.To address this, sterile or scrubbed air is introduced into the fermentor via a sparger...
