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Effect of nanobubble concentrations on fouling control capacity in biogas slurry wastewater distribution systems

文献类型： 外文期刊

作者： Xiao, Yang 1 ; Zhangzhong, Lili 1 ; Tan, Siyuan 2 ; Song, Peng 2 ; Zheng, Wengang 1 ; Li, Yunkai 2 ;

作者机构： 1.Natl Engn Res Ctr Intelligent Equipment Agr, Beijing 100097, Peoples R China

2.China Agr Univ, Coll Water Resources & Civil Engn, Beijing 100083, Peoples R China

3.Minist Educ, Engn Res Ctr Agr Water Saving & Water Resources, Beijing 100083, Peoples R China

4.Shandong Acad Agr Sci, Inst Modern Agr Yellow River Delta, Dongying 257000, Peoples R China

关键词： Wastewater irrigation; Biofouling; Precipitate; Particulate

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：11.4； 五年影响因子：10.6 ）

ISSN： 0960-8524

年卷期： 2024 年 396 卷

页码：

收录情况： SCI

摘要： Nanobubble (NB) represents a promising practice for mitigating fouling in biogas slurry distribution systems. However, its anti -fouling effectiveness and optimal use dosage are unknown. This study investigated the NB antifouling capacity at six concentrations (0 %-100 %, denoting the ratio of maximum NB -infused water; particle concentrations in 0 % and 100 % ratios were 1.08 x 107 and 1.19 x 109 particles mL-1, respectively). Results showed that NB effectively mitigated multiple fouling at 50 %-100 % ratios, whereas low NB concentration exacerbated fouling. NB functioned both as an activator and a bactericide for microorganisms, significantly promoting biofouling at 5 %-25 %, and inhibiting biofouling at 50 %-100 %. Owing to an enhanced biofilm biomineralization ability, low NB concentration aggravated precipitate fouling, whereas high NB doses effectively mitigated precipitates. Additionally, higher NB concentrations demonstrated superior control efficiency against particulate fouling. This study contributes insights into NB effectiveness in controlling various fouling types within wastewater distribution systems.

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