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在Nereda®中,非生物降解颗粒和颗粒污泥的相互作用 - - 从纳米颗粒到微粒

Zhaoxu Peng¹, Antonella L Piaggio², Guilherme Lelis Giglio³

¹Faculty of Civil Engineering and Geosciences, Section Sanitary Engineering, Department of Water Management, Delft University of Technology, Stevinweg 1, Delft, South Holland 2628 CN, the Netherlands; School of Water Conservancy and Transportation, Zhengzhou University, Kexue Road 100, Zhengzhou 450001, China.

|April 29, 2025

概括

有氧颗粒污泥 (AGS) 系统有效过较大的微珠,但与较小的纳米珠斗争. 颗粒大小显著影响AGS中的过和附着效率,对于去除微粒化学氧气需求 (pCOD) 至关重要.

科学领域:

环境工程环境工程
废水处理技术废水处理技术
粒子科学粒子科学

背景情况:

微粒化学氧气需求 (pCOD) 占污水中的有机物质的50%以上.
了解空气颗粒污泥 (AGS) 系统中污水颗粒的命运对于高效的废水处理至关重要.
非生物降解和潜在有害的颗粒需要有效的去除策略.

研究的目的:

在AGS系统中研究模拟的不同大小的污水颗粒的过和附着行为.
为了确定颗粒大小和上流速度在养和通风阶段对颗粒去除的影响.
提供关于优化污泥处理以去除非生物降解颗粒的见解.

主要方法:

使用光微粒 (250微米),微粒 (130±58微米) 和纳米颗粒 (100纳米) 模拟的污水颗粒.
在AGS系统中,在插头流量料和通风阶段下,研究了粒子命运.
在不同的上流速度 (V_upflow) 测量过效率,积累和附着效率.

主要成果:

过性能主要取决于颗粒大小,而不是上流速度.
微粒显示高过效率 (95±3%),在AGS床底部积累.
在通风过程中,纳米线的过效率较低 (43±6%),但附着效率更高 (98.8-99.3%).
附着效率随着在通风过程中颗粒大小的减少而增加.

结论:

颗粒大小是AGS系统中过和附着的一个主要因素.
AGS系统证明了更大的颗粒的有效去除,而较小的颗粒在通风过程中表现出强烈的附着.
这些发现为优化AGS以去除各种非生物降解颗粒,包括pCOD提供了洞察力.

关键词:

有氧颗粒污泥的有氧颗粒污泥附着物附着物附着物过的过方式微粒微粒的使用方法移除效率移除效率移除效率移除效率

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