两个阶段的无氧消化对消化的影响:有机物质量和微生物群落
David Fernández-Domínguez1, Jose Antonio Magdalena2, Eric Trably1
1INRAE, Univ. Montpellier, LBE, 102 Avenue des étangs, 11100, Narbonne, France.
Journal of environmental management
|May 4, 2025
概括
一个两阶段的无氧消化 (DF-AD2) 系统增强了有机物去除和消化剂中的含量. 与单阶段无氧消化 (AD1) 相比,这种方法可以改善甲的产生和挥发性固体的减少.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 废物管理 废物管理
背景情况:
- 无氧消化 (AD) 是有机废物处理的一个关键过程.
- 优化AD效率和消化质量对于可持续的废物管理至关重要.
- 在AD (DF-AD2) 之前整合暗发酵 (DF) 可能会增强有机物分解和营养恢复.
研究的目的:
- 调查两阶段暗发酵-无氧消化 (DF-AD2) 系统对无氧消化物中的有机物质 (OM) 质量和微生物群落的影响.
- 为了将DF-AD2系统与使用相同的原料和治疗时间的单阶段无氧消化 (AD1) 系统进行比较.
- 评估DF-AD2对甲产生的影响,挥发性固体的去除,营养含量,生物可访问性和消化物的生物稳定性.
主要方法:
- 一级AD (AD1) 和两级DF-AD2系统的比较.
- 有机物质质量和微生物群落的高级表征.
- 呼吸计测试用于评估生物可访问性和生物稳定性.
- 分析甲百分比和挥发性固体的去除.
主要成果:
- 与AD1.1.相比,DF-AD2提高了甲百分比8.3%,挥发性固体的去除率提高了6.8%.
- 脱氧化阶段增加了溶解的有机物和矿化,提高了生物可访问性.
- DF-AD2并没有对消化物的生物稳定性产生负面影响,也没有显著改变微生物群落结构.
- 在公元2年期间,古生物群落均质化,其中Methanosarcina占主导地位; Bacteroidales,Spirochaetales和Cloacimonadales主导细菌.
结论:
- DF-AD2系统是一种可行的方法,可以增强有机物去除和消化物的肥值.
- 该系统不会损害消化物的生物稳定性或微生物群落.
- 可能需要进一步优化操作参数和预处理过程,以最大限度地提高能量输出.
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...
Microbes and Methanogenesis
Methanogenesis is a critical microbial process in anaerobic ecosystems responsible for the biological production of methane, a potent greenhouse gas and valuable biofuel. This metabolic pathway is primarily facilitated by methanogenic archaea, which thrive in anoxic environments such as wetlands, sediments, and animal gastrointestinal tracts. The absence of oxygen in these habitats prevents aerobic respiration, thereby favoring alternative biochemical pathways for organic matter degradation.In...
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...
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...
Microbes in Food Production
Microbial fermentation is central to food biotechnology, enhancing flavor, texture, preservation, and stability. Fermentative microorganisms metabolize carbohydrates into organic acids, alcohols, and other metabolites that inhibit spoilage organisms and improve digestibility while contributing distinctive sensory qualities.In baking, amylases naturally present in flour hydrolyze starch into monosaccharides such as glucose, which Saccharomyces cerevisiae ferments anaerobically. Through...
Production of Organic Acids
Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...


