原水浊度变化对重力流超滤性能的影响

尉童; 韩敏; 田宝义; 李荣光; 文刚; 黄廷林; 李凯

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (6) : 3054-3062.

水污染与控制

原水浊度变化对重力流超滤性能的影响

尉童¹, 韩敏², 田宝义³, 李荣光³, 文刚¹, 黄廷林¹, 李凯¹

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Effect of raw water turbidity variation on performance of gravity driven membrane filtration systems

WEI Tong¹, HAN Min², TIAN Bao-yi³, LI Rong-guang³, WEN Gang¹, HUANG Ting-lin¹, LI Kai¹

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摘要

考察了原水浊度阶段性升高对重力流超滤(GDM)系统稳定通量除污性能及生物滤饼层的影响.结果表明,原水浊度升高导致GDM通量明显下降,但经过17~30d后重新达到稳定,与始终低浊(1.8~3.7NTU)的对照组相比,原水浊度升高至10、50和100NTU使GDM系统稳定通量分别降低15%、36%和61%;颗粒物携带的大分子有机物被生物滤饼层中微生物降解为小分子有机物后透过膜,因此原水浊度升高导致出水中溶解性有机物增加;GDM系统启动9d后对氨氮的去除率可达80%以上,原水浊度升高导致氨氮去除能力暂时降低,但经过7~11d的适应期后恢复;原水浊度升高使生物滤饼层厚度增加1.8~7.9倍,滤饼层中微生物胞外聚合物增加37%~98%,微生物种群结构发生一定变化.GDM系统对原水浊度升高有一定的适应能力.

Abstract

This study investigated the effects of raw water turbidity variation on the stable flux, pollutants removal, and bio-cake layer of gravity flow ultrafiltration (GDM) system. The results showed that the increase of raw water turbidity led to a significant decrease in the flux of GDM system, but a new stable flux can be achieved in 17~30 days. Compared to control GDM with low influent turbidity (1.8~3.7NTU), the increase of raw water turbidity to 10, 50 and 100 NTU reduced the stable flux of GDM system by 15%, 36% and 61%, respectively. The macromolecular organic matter carried by particles was degraded by microorganisms in the bio-cake layer to low molecular weight organic matter, which passed through the membrane and resulted in increase of dissolved organic matter in the effluent with the increase of raw water turbidity. The ammonia removal rate of GDM system reached more than 80% after 9days of start-up, and the temporary decrease in ammonia nitrogen removal capacity occurred due to the increase of raw water turbidity. However, it recovered after 7~11days of adaptation period. With the increase of raw water turbidity, the thickness of bio-cake layer increased by 1.8 to 7.9 times and the microbial extracellular polymeric substances increased by 37 to 98%. Meanwhile, the microbial community structure underwent certain changes. This study shows that GDM system has certain adaptability to increase of raw water turbidity.

导出引用

尉童, 韩敏, 田宝义, 李荣光, 文刚, 黄廷林, 李凯. 原水浊度变化对重力流超滤性能的影响[J]. 中国环境科学. 2025, 45(6): 3054-3062

WEI Tong, HAN Min, TIAN Bao-yi, LI Rong-guang, WEN Gang, HUANG Ting-lin, LI Kai. Effect of raw water turbidity variation on performance of gravity driven membrane filtration systems[J]. China Environmental Science. 2025, 45(6): 3054-3062

中图分类号： X52

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