在酸性条件下运行的无氧酸化膜生物反应器用于处理缩的城市废水:性能和影响
Huihui Zhong1, Qiming Wang2, Mengfei Wu1
1Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi 214122, PR China.
Bioresource technology
|March 29, 2024
概括
这项研究优化了无氧酸化膜生物反应器 (AAMBR) 来从城市废水中回收挥发性脂肪酸 (VFA). 与性条件相比,在pH 5.0下运行显著提高了效率,减少了污染,并降低了成本.
科学领域:
- 环境工程 环境工程
- 生物技术是生物技术.
- 废水处理 废水处理
背景情况:
- 市政废水处理面临着低碳需求.
- 将有机物作为挥发性脂肪酸 (VFA) 恢复至关重要.
- 厌氧酸化膜生物反应器 (AAMBRs) 显示出对VFA恢复的希望.
研究的目的:
- 评估AAMBR在酸性条件下 (pH 5.0) 的性能,用于从城市废水中回收VFA.
- 为了比较酸性AAMBR操作与性条件 (pH10.0) 的情况.
- 确定最佳的操作参数,以实现高效和成本效益的VFA生产.
主要方法:
- 开发一种新的无氧酸化膜生物反应器 (AAMBR).
- 使用前透 (FO) 进行废水的膜度.
- 在pH 5.0和pH 10.0下比较AAMBR的性能.
主要成果:
- 在pH值5.0的AAMBR有效地将有机物转化为酸,酸和黄油酸.
- 在pH值为5.0的情况下,达到0.48g/g-COD料的VFA产量.
- 酸性运行 (pH 5.0) 与pH 10.0相比,导致类似的VFA产量,较低的污染,减少营养损失,降低控制成本.
结论:
- 对于AAMBR处理城市废水的最佳pH值是5.0.
- 酸性条件提高了VFA恢复效率,并减少了运营挑战.
- AAMBR为市政废水处理和资源回收提供了可持续和具有成本效益的解决方案.
相关概念视频
Microbial Bioremediation of Hydrocarbons
Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to physical or...
Microbial Leaching
Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...
Acid Mine Drainage
Mining activities that disturb sulfide-rich rocks, particularly those containing pyrite (FeS₂), initiate a cascade of geochemical and microbiological processes with serious environmental implications. When exposed to air and water, pyrite undergoes oxidation, releasing sulfate, ultimately forming sulfuric acid and mobilizing heavy metals into surrounding water systems. This phenomenon, known as acid mine drainage (AMD), results in low pH waters laden with toxic elements that threaten aquatic...
Microbial Corrosion
Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...
Bioreactor Design and Operational System
Bioreactors are engineered vessels designed to cultivate microorganisms under controlled conditions for industrial bioprocessing. They maintain sterility and allow precise regulation of pH, temperature, oxygen, and nutrient levels to optimize microbial growth and metabolite production. Bioreactors range from small laboratory units of 1 liter to industrial systems holding up to 500,000 liters, though only about 75% of their volume is actively used for fermentation. The remaining headspace...
Production of Organic Acids
Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...


