Micro - Nano Bubble Technology- An In-Situ Treatment for Microbial Community Changes in Urban River

Toshiyuki Tony
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Abstract

Urban watercourses are essential and important to the urban ecosystem, landscape ecology and citizen’s life. However, in recent decades, rapid industrialization and urbanization has accelerated the worsening waters in urban area in China. Urban rivers are usually used as drains for sewage, industrial wastewater and even domestic garbage, which contained various pollutants. When organic pollutants are discharged to rivers, part of them is precipitated in the sediment and the others are metabolized by microbes. During the metabolism, the microbes exhaust the dissolved oxygen in the water and make the aquatic environment anoxic, which promotes the growth of anaerobic microbes. As a result, the river is in anoxic condition, showing black appearance and stinking smell. These black-odor rivers flows through the cities affect residents’ life and pose a serious threat to human health. During the metabolism, the microbes exhaust the dissolved oxygen in the water and make the aquatic environment anoxic, which promotes the growth of anaerobic microbes. As a result, the river is in anoxic condition, showing black appearance.
微纳气泡技术——城市河流微生物群落变化的原位处理
城市河道对城市生态系统、景观生态和市民生活至关重要。然而,近几十年来,快速的工业化和城市化加速了中国城市水域的恶化。城市河流通常被用作污水、工业废水甚至生活垃圾的排水沟,其中含有各种污染物。当有机污染物排入河流时,一部分在沉积物中沉淀,另一部分被微生物代谢。微生物在代谢过程中,将水中的溶解氧排尽,使水生环境缺氧,促进厌氧微生物的生长。结果,这条河处于缺氧状态,呈现出黑色的外观和恶臭。这些黑臭的河流流经城市,影响着居民的生活,对人体健康构成严重威胁。微生物在代谢过程中,将水中的溶解氧排尽,使水生环境缺氧,促进厌氧微生物的生长。结果,河流处于缺氧状态,呈现黑色外观。
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