评估微生物稳定性和预测市政固体废物的热友干甲发酵中的生物气体生产
Yuya Sato1, Kentaro Hasemi2, Kazunori Machikawa3
1Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan.
Bioresource technology
|May 1, 2024
概括
城市固体废物 (MSW) 的干甲发酵涉及特定的微生物. 使用原料数量的简单模型准确地预测了生物气生产,有助于过程优化.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 生物技术是生物技术.
背景情况:
- 在城市固体废物 (MSW) 的全面干甲发酵中对微生物群落和生物气体生产的理解有限.
- 干无氧消化过程与典型方法有很大的不同,需要进行具体的研究.
研究的目的:
- 在MSW的全面干甲发酵中描述污泥的微生物组成.
- 根据原料和环境因素开发生物气生产的预测模型.
主要方法:
- 在无氧污泥中分析微生物群落.
- 开发一个多重线性回归 (MLR) 模型,将MSW原料数量和温度与生物气输出相关联.
- 使用独立数据验证MLR模型.
主要成果:
- 无氧污泥主要由性甲基生物 (Methanoculleus) 和合成酸盐氧化细菌 (Caldicoprobacter) 占据主导地位,以及MSW降解剂 (Clostridia).
- 核心微生物种群保持稳定,尽管MSW输入和生物气产量的变化.
- 在历史的MSW原料数量和生物气产量之间发现了强烈的相关性 (r=0.77).
- 开发的MLR模型,包括温度,显示了高预测准确度 (R2=0.975) 生物气生产.
结论:
- 干甲发酵的MSW有着独特的微生物社区结构.
- 使用原料数据的简单的MLR模型提供了一种可靠的方法来预测沼气生产.
- 这种预测方法可以支持运营决策,以提高生物气生产效率.
相关概念视频
01:30Environmental Applications of Microorganisms
1.5K
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...
1.5K
01:23Microbial Fermentation
1.8K
Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
1.8K
01:29Overview of Archaea
1.9K
Archaea, named after the Archaean eon, represent a unique domain of life, distinct from bacteria and eukaryotes, with remarkable traits. Their cellular and molecular features, ecological adaptability, and industrial relevance highlight their importance in understanding life processes and leveraging biotechnology.Cellular and Molecular CharacteristicsA defining feature of archaea is their unique membrane composition. Archaeal membranes contain ether-linked isoprenoid lipids, which confer...
1.9K
01:26Microbes and Methanogenesis
105
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...
105
01:29Microbes in Food Production
407
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...
407
01:28Microbial Bioremediation of Plastics
142
Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...
142