综合城市水资源管理,将铁盐的生产和应用与生物气的升级相结合
Zhetai Hu1, Lanqing Li2,3, Xiaotong Cen1
1Australian Centre for Water and Environmental Biotechnology, The University of Queensland, St Lucia, QLD, 4072, Australia.
Nature communications
|October 12, 2023
概括
本研究提出了一种综合城市水资源管理方法,通过电化学方法生产铁盐,以升级生物气和处理废水. 这种方法为进口危险化学品提供了一个可持续的,具有成本效益的替代方案.
科学领域:
- 环境工程 环境工程
- 电化学 电化学 电化学
- 废水处理 废水处理
- 生物能源回收利用的方法
背景情况:
- 综合城市水资源管理需要高效的技术解决方案,以实现全系统的改进.
- 目前依赖进口的,危险的铁盐用于水处理,这给经济和环境带来了挑战.
- 污水处理为资源回收提供了潜力,包括生物能源和必需化学品.
研究的目的:
- 开发一个综合工艺,将铁盐制造,生物气改造和废水处理联系起来.
- 通过氧化铁的电化学电池来证明铁碳酸盐 (FeCO3) 的生产.
- 为了评估电化学生产的FeCO3在废水和污泥处理中的性能,与传统铁盐相比.
主要方法:
- 使用氧化铁电化学电池去除生物气中的CO2,H2S和NH3,实现生物气升级.
- 同时在电化学电池中产生铁碳酸盐 (FeCO3).
- 将电化学生成的FeCO3应用于城市废水和污泥中,用于污染物清除和污泥调节.
主要成果:
- 电化学过程有效地从沼气中去除了CO2,H2S和NH3,提高了其质量.
- 生产的FeCO3在废水中去除硫化物和酸盐方面表现相似或更好.
- 使用电化学生成的FeCO3.3,污泥的沉降性和脱水性得到了显著的改善.
- 该工艺为进口铁盐提供了自给自足,成本效益和环保的替代方案.
结论:
- 开发的综合工艺提供了一种可持续的方法,用于内部生产用于城市水资源管理的铁盐.
- 这种方法提高了生物气质量,提高了废水和污泥处理效率.
- 它减少了对进口危险化学品的依赖,降低了经济和环境成本,同时使生物能源回收成为可能.
相关概念视频
01:30Environmental Applications of Microorganisms
32
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...
32
01:17Precipitation and Co-precipitation
1.8K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
1.8K
00:46Bioremediation
18.7K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.7K
01:06Coagulation
315
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
315
01:15Metabolism of Chemolithotrophs
21
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.
21