Self-Forming Dynamic Membrane BioReactors (SFDMBRs) for wastewater treatment

How, Seow Wah; Kang, Chae-Yeon; Min, Sla; Carrera, Paula; Siddiqui, Muhammad Ahmar; Chen, Guanghao; Wu, Di

doi:10.1016/b978-0-443-19180-0.00006-7

Cited by 1 publication

(2 citation statements)

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“…Afterwards, the filtration system can soon be restored so that the biological membrane can form again. The easy removal and then reforming of the biological membrane explain why it is also called "dynamic membrane" (DM) [21].…”

Section: Technology Offersmentioning

confidence: 99%

“…As previously described, water jet rinsing proved to be effective when the sludge was sufficiently dense and in "good health" (i.e., not subject to stress conditions due to feed or operation). Nevertheless, physical mesh cleaning usually has temporary effects on the system's filtration performance, with losses of suspended solids through the mesh and a decrease in overall effluent quality during the transient phase of new DM formation [21]. When the activated sludge faces stress, it can produce bioproducts such as soluble microbial products (SMP), extracellular polymeric substances (EPS), or other classes with colloidal characteristics that could reduce the pore size, stick on the support surface, and make physical cleaning less effective.…”

Section: Effects Of the Mesh Pore Size And The Aml On Sfd Mbr Perform...mentioning

confidence: 99%

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Optimal Mesh Pore Size Combined with Periodic Air Mass Load (AML) for Effective Operation of a Self-Forming Dynamic Membrane BioReactor (SFD MBR) for Sustainable Treatment of Municipal Wastewater

Boulerial,

Salerno,

Castrogiovanni

et al. 2024

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A self-forming dynamic membrane bioreactor (SFD MBR) is a cost-effective alternative to conventional MBR, in which the synthetic membrane is replaced by a “cake layer,” an accumulation of the biological suspension over a surface of inert, low-cost support originated by filtration itself. Under optimized conditions, the cake layer is easy to remove and quick to form again, resulting a “dynamic membrane.” The permeate of the SFD MBR has chemo-physical characteristics comparable to those of conventional ultrafiltration-based MBR. In this paper, two nylon meshes with pore sizes of 20 and 50 µm, respectively, were tested in a bench-scale SFD MBR in which an air mass load (AML) was periodically supplied tangentially to the filtration surface to maintain filtration effectiveness. The SFD MBR equipped with 20 µm nylon mesh coupled with 5 min of AML every 4 h showed the best performance, ensuring both a permeate with turbidity values always below 3 NTU and revealing no increases in transmembrane pressure (TMP) with manual maintenance needs. A benchmark test with the only difference of a suction break (relaxation) instead of AML was conducted under identical operating conditions for validation with an already known maintenance strategy. This latter test produced a permeate of very good quality, but it needed frequent TMP increases and consequent manual cleanings, showing that a periodic AML coupled with the use of a 20 µm mesh can be an optimal strategy for long-term operation of SFD MBR.

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Section: Technology Offersmentioning

confidence: 99%

Section: Effects Of the Mesh Pore Size And The Aml On Sfd Mbr Perform...mentioning

confidence: 99%