一个新的动态膜装备的基于硫的元素脱反应堆,用于高酸盐废水的高效且易于维护的处理
Na Zhang1, Xiang-Li Zeng1, Wen-Wei Liao1
1State Key Laboratory of Urban Water Resources and Environment, School of Eco-Environment, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China.
Water research
|May 27, 2025
概括
使用硫粉和污泥的新动态膜反应器提高了脱效率并降低了成本. 这种创新方法为处理高酸盐废水提供了更好的污染耐受性和更容易的维护.
科学领域:
- 环境工程 环境工程
- 水处理技术水处理技术
- 生物技术是生物技术.
背景情况:
- 基于元素硫的脱反应堆 (ESDeN) 提供高效率,但难以保留硫粉.
- 微膜 (MM) 可以保留硫粉,但会造成污染和高成本.
- 现有的方法限制了基于硫的脱的实际应用.
研究的目的:
- 开发和评估一个新型动态膜装备ESDeN (ESDeN-DM) 反应器.
- 解决ESDeN过程中的硫粉保留问题.
- 提供一种低成本,低污染的替代传统的膜装备系统.
主要方法:
- 通过用硫粉和污泥预涂覆尼龙织物,形成动态膜 (DM).
- 优化DM形成条件,包括织物孔径和预涂层流量.
- 进行ESDeN-DM和ESDeN-MM反应堆的长期比较运行.
主要成果:
- 优化的DM形成实现了低透度 (<5NTU).
- 据ESDeN-DM证明,与ESDeN-MM.相比,ESDeN-DM的脱率 (>3 kg N m−3 d−1) 是可以比较的.
- ESDeN-DM显示出优越的污染耐受性 (56%的运行时间长),更容易的再生,以及超过90%的成本降低.
结论:
- ESDeN-DM反应堆是高酸盐废水处理的高效和可维护的解决方案.
- 动态膜为ESDeN系统中的微过提供了一个具有成本效益和防腐性的替代方案.
- 这项技术在工业废水处理应用中具有重大潜力.
相关概念视频
Inorganic Nitrogen Assimilation
118
Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...
118
Metabolism of Chemolithotrophs
192
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.
192
The Nitrogen Cycle
54.5K
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...
54.5K
Sulfur Assimilation
80
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
80
2° Amines to N-Nitrosamines: Reaction with NaNO2
4.6K
Secondary amines react with nitrous acid to form N-nitrosamines, as depicted in Figure 1. Nitrous acid, a weak and unstable acid, is formed in situ from an aqueous solution of sodium nitrite and strong acids, such as hydrochloric acid or sulfuric acid, in cold conditions. In the presence of an acid, the nitrous acid gets protonated. The subsequent loss of water results in the formation of the electrophile known as nitrosonium ion.
4.6K


