相关实验视频

Updated: Jun 4, 2025

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities

Published on: December 25, 2015

评估在混合培养工艺中在低C/N条件下在PHA积累阶段内部再利用含废水的效率和潜力

Qingyan Lv¹, Hanwen Gao¹, Long Huang¹

¹School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China.

Bioresource technology

|January 1, 2025

概括

这项研究表明,在从废弃生物质中生产聚酸酸盐 (PHA) 时,氨的有效再利用. 优化条件显著提高PHA产量,同时减少能源使用和排放.

科学领域:

生物技术和生物化学工程生物技术和生物化学工程
环境科学与工程环境科学与工程
聚合物科学聚合物科学

背景情况:

聚酸酸 (PHAs) 为传统塑料提供一种可生物降解的替代品.
基于混合培养 (MC) 的PHA生产面临来自氨抑制的挑战,影响产量和能源效率.
从废物生物质中有效的碳回收对于可持续的PHA合成至关重要.

研究的目的:

研究PHA生产中有效的氨二氧化再利用策略.
为了减轻氨对PHA产量和能源消耗的抑制作用.
为了防止与氨排放相关的二次污染.

主要方法:

使用各种混合培养类型,基质组成,养策略和氧气水平进行了PHA生产试验.
该研究将条件优化为富含酸盐,高负荷,低氧模式 (R_BC(4) P(1) O(+)).
在生产PHA的MC丰富系统中测试了含氨的废水的直接回收.

主要成果:

优化模式 (R_BC(4) P(1) O(+)) 实现了0.45g COD/g COD的PHA转换比率,比比较模式高1.8倍.
氨吸收达到0.06g NH3-N/g PHA,生产率为4.54g/L,表明有效的回收.
直接废水回收没有显著的负面影响到MC流的特性或PHA合成能力.

结论:

高效的氨重复利用是可行的,对PHA生产有利.
优化的工艺条件提高PHA产量,减少能源消耗,降低二氧化碳排放.
在回收废水中溶解的微生物产品对用于PHA合成的MC丰富具有最小的不良影响.

关键词:

氨的气是氨中的一种.混合文化 (MC) 是一种文化.PHA的生产效率提高了生产效率.聚酸酸 (PHA) 是一种多酸.重复使用重复使用.

更多相关视频

Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O

Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O

Published on: October 7, 2020

Electrochemically and Bioelectrochemically Induced Ammonium Recovery

Electrochemically and Bioelectrochemically Induced Ammonium Recovery

Published on: January 22, 2015

相关概念视频

Metabolism of Chemolithotrophs

Metabolism of Chemolithotrophs

Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.

Environmental Applications of Microorganisms

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...

Overview of Nitrogen Metabolism

Overview of Nitrogen Metabolism

Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...

The Nitrogen Cycle

The Nitrogen Cycle

Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...