System for cleaning wastewater

US11866355B2 · kind B2 · utility

Assignee

• Nanjing University · CN

Inventors

• Haidong Hu · Nanjing, CN
• Kewei LIAO · Nanjing, CN
• Sijia MA · Nanjing, CN
• Yuanji SHI · Nanjing, CN
• Hongqiang Ren · Nanjing, CN
• Xuxiang ZHANG · Nanjing, CN
• Bing Wu · Nanjing, CN
• Jinfeng Wang · Shanghai, CN

Key dates

• Filing date: Jun 9, 2021
• Grant date: Jan 9, 2024
• Expiry date: Mar 1, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W10/10
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A system for cleaning wastewater, includes: an absorption-biodegradation-denitrification (ABN) reactor, a sequential adsorption reactor, a disinfection reactor, and a sludge anaerobic fermentation reactor. The ABN reactor is an integrated reactor including: a biosorption tank, an intermediate sedimentation tank, a biologically-enhanced degradation tank, a denitrification biofilter, and a secondary sedimentation tank. The pretreated wastewater is introduced into the ABN reactor for removal of chemical oxygen demand, nitrogen and phosphorus; the ABN reactor effluent is introduced into the sequential adsorption reactor for the removal of high-risk pollutants; the sequential adsorption reactor effluent is introduced into the disinfection reactor for the elimination of viruses and other pathogenic microorganisms; the sludge produced by the ABN reactor is introduced into the anaerobic sludge fermentation reactor for alkaline fermentation. The system is effective for removing high-risk pollutants and reducing effluent toxicity, which can be used for the upgrading and reconstruction of the wastewater treatment system.