Cargando…

Biofouling mechanism and cleaning procedures for Spirulina platensis as an organic fertilizer draw solution

The forward osmosis (FO) desalination process has recently acknowledged a lot of attention as a promising solution for reducing the disadvantages of existing desalination systems. This work aimed to investigate the effect of a selected liquid organic fertilizer a novel draw solution produced from “m...

Descripción completa

Detalles Bibliográficos
Autores principales: Al Bazedi, Ghada, Soliman, Noha, Sewilam, Hani
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10439861/
https://www.ncbi.nlm.nih.gov/pubmed/37479923
http://dx.doi.org/10.1007/s11356-023-28694-4
Descripción
Sumario:The forward osmosis (FO) desalination process has recently acknowledged a lot of attention as a promising solution for reducing the disadvantages of existing desalination systems. This work aimed to investigate the effect of a selected liquid organic fertilizer a novel draw solution produced from “microalgae Spirulina platensis” on the biofouling mechanism of FO membrane. Different draw solution (DS) concentrations ranging 240–480 g/L were examined, obtained water flux ranging from 6.5 to 3.4 Lm(2)h(-1). A high flux decline was observed when using higher DS concentrations due to fouling layer accumulated throughout the membrane area which lowers the effective osmotic pressure difference. Different cleaning strategies were examined. The biofouled membrane was cleaned on-line with deionized water (DI) and externally using ultrasound (US) and HCl. Baseline experiments were done to investigate the efficiency of the cleaning strategies. After cleaning using the deionized water (DI) water, it was found that the water flux progressed from 3.4 to 7 Lm(2)h(-1), while when using acid cleaning the flux recovered to 15 Lm(-2)h(-1). The efficacy and amount of foulant removed by each cleaning stage were assessed using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX).