Scholarlink

<p>Effective sanitation requires sufficient wastewater treatment, and the total suspended solids (TSS) concentration is a key treatment performance indicator. Whereas membrane-based separation methods employing micro- or ultra-filtration achieve high TSS removal, they are costly and energy-intensive because of membrane fouling, and gravity-based separation methods often cannot consistently meet TSS discharge standards. Here we present a mesh bioreactor (MeBR) that combines a coarse-pore mesh with a piezoelectric fouling removal strategy for efficient sludge–liquid separation. Experiments revealed that irreversible mesh fouling was completely eliminated within 10 s when near-field transient cavitation, induced by piezoelectric ultrasound transducers, was the primary cleaning mechanism, rather than oscillation or reactive oxygen species generation. This ultrafast cleaning enabled continuous ultrahigh-flux MeBR operation (148–307 l m<sup>−2</sup> h<sup>−1</sup>), which ensured rapid biocake formation ( &lt; 10 min) and globally regulation-compliant TSS levels. Overall, the transient cavitation-integrated MeBR offers a sustainable, reliable and energy-efficient solution for wastewater treatment.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Transient cavitation enables ultrafast fouling removal in mesh bioreactors for efficient sludge‒liquid separation during wastewater treatment

  • 期刊论文

  • 发表日期：

    2025年10月31日

查看全文
  • Yu Luo,
  • Hongxiao Guo,
  • Dao Guan,
  • Huo Xu,
  • Yucong Xu,
  • Guanghao Chen

摘要

Effective sanitation requires sufficient wastewater treatment, and the total suspended solids (TSS) concentration is a key treatment performance indicator. Whereas membrane-based separation methods employing micro- or ultra-filtration achieve high TSS removal, they are costly and energy-intensive because of membrane fouling, and gravity-based separation methods often cannot consistently meet TSS discharge standards. Here we present a mesh bioreactor (MeBR) that combines a coarse-pore mesh with a piezoelectric fouling removal strategy for efficient sludge–liquid separation. Experiments revealed that irreversible mesh fouling was completely eliminated within 10 s when near-field transient cavitation, induced by piezoelectric ultrasound transducers, was the primary cleaning mechanism, rather than oscillation or reactive oxygen species generation. This ultrafast cleaning enabled continuous ultrahigh-flux MeBR operation (148–307 l m−2 h−1), which ensured rapid biocake formation ( < 10 min) and globally regulation-compliant TSS levels. Overall, the transient cavitation-integrated MeBR offers a sustainable, reliable and energy-efficient solution for wastewater treatment.