Foulant-specific transformations of polysulfone membrane: A mechanistic study of shrimp feed and humic acid fouling with implications for Recirculating Aquaculture Systems (RAS)

Wijaya, Candra and Sutrisna, Putu Doddy and Mustika, Pra Cipta Buana Wahyu and Limahardja, Marchis Wonder and Handoyo, Ivania (2026) Foulant-specific transformations of polysulfone membrane: A mechanistic study of shrimp feed and humic acid fouling with implications for Recirculating Aquaculture Systems (RAS). Case Studies in Chemical and Environmental Engineering, 14 (101478). ISSN 2666-0164

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Abstract

The integration of ultrafiltration (UF) into recirculating aquaculture systems (RAS) is a promising strategy for managing organic wastewater contaminants, yet its efficacy is hindered by severe membrane fouling and physico-chemical transformation. This study investigates these challenges by evaluating polysulfone (PS) membrane under dead-end and cross-flow hydrodynamics. Performance was systematically assessed using shrimp feed (SF; 1.5–2.5 g L−1) and humic acid (HA; 0.2–0.7 g L−1) as aquaculture-relevant model foulants under varied operating pressures. The single-foulant systems were employed to isolate foulant-specific membrane responses under controlled conditions rather than to reproduce the complete physicochemical composition of actual RAS water. Pristine and fouled membranes were characterized (MWCO, SEM, FTIR, contact angle) to elucidate fouling mechanisms. Post-operation analyses revealed distinct, foulant-specific surface transformations. Higher operating pressures were associated with more pronounced time-dependent flux deterioration, particularly during SF filtration, whereas HA maintained consistently high rejection across the investigated pressure range. Furthermore, Cross-flow operation exhibited higher mean flux than dead-end filtration under the investigated conditions, with the configuration-associated enhancement being particularly pronounced for SF.

Item Type:	Article
Uncontrolled Keywords:	Aquaculture; Fouling; Polysulfone; Ultrafiltration; RAS
Subjects:	T Technology > TP Chemical technology
Divisions:	Faculty of Engineering > Department of Chemical Engineering
Depositing User:	CANDRA WIJAYA
Date Deposited:	09 Sep 2026 05:55
Last Modified:	09 Sep 2026 05:55
URI:	http://repository.ubaya.ac.id/id/eprint/51262

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