Studies on a new stainless steel mesh dynamic membrane for wastewater treatment. (February 2020)

• Record Type: Journal Article
• Authors: Pei, Qiqi; Luo, Jianzhong; Chen, Min
• Is Part Of: Bioresource technology. Volume 297(2020)
• Publication Date: 2020-02
• Subjects: Activated sludge -- Stainless steel mesh -- New dynamic membrane filtration technology -- Rapid solid-liquid separation -- Sewage treatment; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2019.122405
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlight: A new stainless steel mesh DMBR was used for domestic sewage treatment. Effective fast solid-liquid separation can be completed. The removal of COD and TP were superior to ordinary activated sludge. Excellent biodegradability and filtration performance were achieved. Higher EPS and lower Zeta potential levels promoted sludge flocculation. Abstract: In this study an innovative dynamic membrane bioreactor (DMBR) was implemented from a stainless-steel mesh filter, which was used as a support material, and activated sludge used as an adsorption and filtration interface containing particulate organics. This work indicated that DMBR can achieve rapid solid-liquid pollutants separation. The activated sludge in the aeration tank quickly formed a thin dynamic membrane layer on the filter. The layer was automatically regenerated as the sludge traveled through the reactor. The experimental results for the new DMBR showed good biodegradability in sewage treatment when the activated sludge concentrations ranged between 3000 and 7000 mg/L. Excellent adsorption and filtration performance were also achieved. This dynamic membrane layer significantly improved the effluent quality. The average removal rates were 92.2% and 91.5% for Chemical Oxygen Demand (COD) and Total Phosphorus (TP), respectively. The sewage treatment index was better than the current standard activated sludge process.