城市固体废物通过三阶段膜通风生物膜反应器系统的液处理
Xinglin Li1, Ling Xiao2, Xiaopeng Sui3
1Tianjin Key Laboratory of Environmental Technology for Complex Trans-media Pollution, Carbon Neutrality Interdisciplinary Science Centre, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China.
Chemosphere
|July 15, 2024
概括
一种新的综合工艺有效地使用凝固和膜通风生物膜反应器 (MABR) 处理具有挑战性的城市固体废物液 (MSWL). 这种系统可显著地去除有机物和,耗能低.
科学领域:
- 环境工程 环境工程
- 水处理技术水处理技术
- 生物反应器系统
背景情况:
- 城市固体废物水 (MSWL) 由于有机和盐度含量高,因此存在重大处理挑战.
- 现有的治疗方法经常与MSWL中发现的有毒,难以降解的化合物作斗争.
- 开发高效和低能耗的MSWL处理解决方案对于环境保护至关重要.
研究的目的:
- 评估结合凝血预处理和三阶段膜通风生物膜反应器 (MABR) 系统治疗实际MSWL的有效性.
- 评估MSWL中有机物和化合物的去除效率.
- 调查影响MABR性能的微生物社区动态和关键操作参数.
主要方法:
- 使用聚合化 (PAC) 的凝固预处理的应用.
- 三级膜通风生物膜反应堆 (MABR) 系统的操作.
- 分析化学氧气需求 (COD),总 (TN) 和氨 (NH4+-N) 的去除情况.
- 使用主要成分分析 (PCA) 和皮尔森相关系数 (r) 的微生物社区分析.
主要成果:
- 凝血从MSWL中去除了9.8%-21.3%的有机物质.
- 在没有外部碳来源的情况下,三级MABR实现了95.6%的COD去除和高去除效率 (84.3%TN,79.9%NH4+-N).
- 丰富的化/脱化细菌 (例如,Thiobacillus,Azoarcus,Methyloversatilis) 显示出高毒性耐受性.
- 气化压被确定为影响MABR性能和微生物群落的关键操作参数.
结论:
- 结合凝血-MABR系统是一种高度有效的方法来治疗具有挑战性的MSWL.
- MABR提供了一种低能耗,高效的解决方案,用于同时从MSWL中去除碳和.
- 该系统展示了MSWL中存在的有毒化合物的稳定性和耐受性,并得到了特定微生物群落的支持.
相关概念视频
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...
Microbial Wastewater Treatment
Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
Microbial Fuel Cells
Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...
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...
Bioreactor Controls-II
In aerobic fermentations, oxygen is vital for microbial growth and metabolite production. Since air comprises only about 20% oxygen and the gas is poorly soluble in water—just 9 ppm at 20°C—supplying sufficient oxygen becomes a critical challenge, especially in high-demand processes like yeast growth or citric acid production. Even a fully saturated broth may offer only a few seconds of oxygen availability.To address this, sterile or scrubbed air is introduced into the fermentor via a sparger...
Biological Treatment of Effluent and Waste Water
Biological wastewater treatment relies on the metabolic activity of microorganisms to remove pollutants from sewage. In modern treatment systems, this process is organized into sequential stages that progressively reduce solid material, dissolved organic matter, and microbial contamination. Each stage plays a distinct role in improving water quality and preparing the effluent for safe discharge or reuse.Primary and Secondary TreatmentPrimary treatment is a physical process that removes large...


