YANGChun,XIEJing,CHENGYu,et al.Impact of Rolling on AAO Process for Treating Shipboard Domestic Sewage[J].China Water & Wastewater,2025,41(9):32-39.
横摇对AAO工艺处理船舶生活污水的影响机制
- Title:
- Impact of Rolling on AAO Process for Treating Shipboard Domestic Sewage
- Keywords:
- shipboard domestic sewage; AAO process; ship rolling intensity; pollutant removal; microbial community
- 摘要:
- 船舶生活污水作为一种移动污染源，是河湖和海洋生态环境污染防治中需重点关注的对象。为探究晃荡这一特殊场景下船载污水处理装置内活性污泥系统的微生物特性和处理效率，通过三自由度晃荡模拟平台，采用AAO工艺小试装置，分析了横摇幅度和周期对活性污泥微生物特性及污染物去除率的影响。研究表明，幅度≤15°、周期≥12 s的轻度横摇对COD的去除有利，但横摇强度提高（幅度>15°，周期<12 s）则对其不利。减少横摇周期和增加幅度可提高氨氮去除率，但会抑制反硝化过程，降低TN去除率。横摇幅度对去除COD和TN的影响大于周期，但交互作用不明显。除幅度为22.5°和周期为12 s外，其余横摇工况有助于通过增加胞外聚合物含量来提升除磷效率。微生物群落的16S rRNA高通量测序发现，适度的横摇（幅度≤5°，周期≤12 s）可提升微生物丰富度，但会降低微生物多样性。
- Abstract:
- Shipboard domestic sewage, as a mobile pollution source, is a concern in the prevention and control of pollution in rivers, lakes, and oceans. To investigate the microbial characteristics and operational performance of the activated sludge system in shipboard sewage treatment units at the specific conditions of ship movement, a three-degree of freedom oscillation platform was used to simulate ship rolling. A pilot-scale AAO process device was employed to analyze the effects of rolling amplitude and period on the microbial characteristics of activated sludge and pollutant removal efficiency. It was found that mild rolling (amplitude≤15°, period≥12 s) enhanced the COD removal, whereas higher intensified rolling (amplitude≥15°, period≤12 s) hampered the process. Shorter rolling periods and greater amplitudes was able to increase ammonia nitrogen removal rates, whilst inhibited denitrification, leading to the reduction of TN removal efficiency. The effect of rolling amplitude on COD and TN removal was higher than the period, and the interaction was not significant. Except for the condition with an amplitude of 22.5° and a period of 12 s, the total phosphorus (TP) removal efficiency was improved by increasing the content of extracellular polymeric substances (EPS) at the rest of experimental rolling conditions. The high-throughput 16S rRNA sequencing analysis of the microbial community indicated that mild rolling (amplitude≤5°, period≤12 s) increased the microbial richness, but decreased the diversity.
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