污水处理厂的运行模式是否应该彻底改变,以尽量减少温室气体排放?
Paz Nativ1, Anat Weisbrod1, Ori Lahav1
1Faculty of Civil and Environmental Engineering, Technion - Israel Institute of Technology.
The Science of the total environment
|March 21, 2024
概括
本研究提出了一种新的废水处理方法,通过优化活性污泥工艺来减少温室气体排放. 这种方法旨在回收营养和能量,减少对环境的影响.
科学领域:
- 环境工程 环境工程
- 生物技术是生物技术.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 城市污水处理厂 (WWTP) 是温室气体 (GHG) 的重要排放者,如甲 (CH4),氧化 (N2O) 和二氧化碳 (CO2).
- 目前的WWTP操作需要大量的能量,并导致营养物质的损失,这给环境带来了挑战.
研究的目的:
- 建议WWTP进行根本性的运营转变,以尽量减少温室气体排放.
- 为了最大限度地提高营养和能量回收 (,氨,甲),同时降低WWTP的能源需求.
主要方法:
- 在低污泥保留时间 (SRT < 2 天) 运行活性污泥工艺,以最大限度地提高异质质量产量并消除化.
- 使用独特的离子交换材料 (ZnHCF) 来将氨与WWTP废水分离.
- 用低容量NaCl溶液再生离子交换物质并回收用于肥料的氨.
主要成果:
- 由于高细菌产量和缺乏化,预计将提高甲产量3-4倍.
- 预计在有氧阶段较低的氧气消耗.
- 与传统方法相比,项目可显著降低N2O排放量.
结论:
- 拟议的概念显示了大幅减少温室气体排放和资源回收的潜力.
- 一个近似的能量质量平衡表明这个概念值得进一步研究.
- 需要实证研究和生命周期评估 (LCA) 来验证拟议的方法.
相关概念视频
00:46Bioremediation
18.3K
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.
18.3K
01:30Methods of Sterilization II: Chemical Methods
6.3K
In healthcare, the chemical method of sterilization uses chemical sterilants to treat surgical instruments and medical supplies to help prevent the transmission of infectious pathogens to patients. Due to heat sensitivity, most medical supplies and equipment should not be exposed to high temperatures. These parts include rubber, plastic, glass, and other similar elements.
Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...
Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...
6.3K