Hollow-Fibre forward osmosis membrane module stress tests

diplomsko delo univerzitetnega študijskega programa I. stopnje

Urban Gselman (Author), Irena Petrinić (Mentor), Sylvia Braekevelt (Co-mentor), Maria Salud Camilleri-Rumbai (Co-mentor)

Abstract

Humanity has recently begun to realize that resources on Earth are not infinite and that, consequently, it is imperative for us to start to use them sustainably and renewably. Aligned with this mentality, forward osmosis has been rigorously studied in the past few decades with some commercially available products already on the market. This thesis used one of those products, namely, the Aquaporin HFFO 2 membrane module, and assessed its stability in sodium metabisulfite solution and high salinity without flowing solutions under long-term storage conditions. The sodium metabisulfite preservation part was devised to upgrade the existing guidelines for prolonged storage of fouled membranes and the osmotic drying project was looking at a scenario where the modules would be exposed to a salt solution on the draw side and no flowing wastewater on the feed side. The assessments were made on pristine HFFO 2 membrane modules and with RO water prepared on site. Their performance after exposure was measured with an internal quality control procedure, producing values for water flux, reverse salt flux, normalized reverse salt flux and temperature, which were later compared with the initial values. The findings show us that the sodium metabisulfite and increased salinity have a detrimental effect on the membrane inside of the module, but not enough to be considered damaged and would need to be discarded. More valuable results will be gained if the measurements are done on fouled membranes, as the biggest factor in increasing the lifetime of a module is preventing algal and bacterial growth

Keywords

forward osmosis;Aquaporin HFFO 2;sodium metabisulfite;osmotic drying;prolonged storage;

Data

Language:	English
Year of publishing:	2020
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	[U. Gselman]
UDC:	544.725:628.3(043.2)
COBISS:	29980163
Views:	421
Downloads:	0
Average score:	0 (0 votes)
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Other data

Secondary language:	Slovenian
Secondary title:	Vzdržljivostni testi votlo-vlaknastih osmoznih membranskih modulov
Secondary abstract:	Človeštvo se je pred nedanjim začelo zavedati dejstva, da surovine na Zemlji ne obstajajo v neskončnih količinah in da je z njimi potrebno začeti obnovljivo in trajnostno gospodariti. V skladu s to mentaliteto se je v zadnjih parih desetljetjih veliko raziskovalo na področju osmoze in njene uporabnosti pri recirkulaciji odpadne vode v industriji. Razvilo se je tudi nekaj komercialnih produktov, enega od katerih uporablja to diplomsko delo. V tem diplomskem delu je uporabljen Aquaporinov HFFO 2 membranski modul, pri katerem je bila preverjena njegova stabilnost v raztopini natrijevega metabisulfata in raztopini visoke slanosti brez pretoka raztopin v daljših časovnih obdobjih. Namen prvega dela je dopolniti že obstoječe Aquaporinove smernice dolgoročnega shranjevanja rabljenih membranskih modulov. Del poimenovan osmotsko sušenje pa je pod drobnogled vzel scenarij dolgotrajne izpostavljenosti visoki slanosti raztopine na gonilni strain in brez tekoče odpadne vode na drugi. Vsi testi so bili izvedeni na novih modulih in z uporabo vode prečiščene z reverzno osmozo. Delovanje modulov je po in pred testi bilo ocenjeno z internim postopkom preverjanja kvalitete, ki je dal vrednosti vodnega fluksa, povratnega fluksa topljenca, selektivnosti povratnega fluksa ter temperature. Vsi rezultati so bili pozneje primerjani z osnovnim stanjem. Rezultati so pokazali, da imata obe raztopini škodljiv vpliv na kvaliteto delovanja modula, a ne dovolj, da bi modul bilo potrebno zavreči. V prihodnosti bo potrebno narediti enako ali podobno študijo na rabljenih membranah, saj je največji faktor pri krajšanju življenske dobe membranskih modulov ravno rast alg in bakterij, katero pa obe obdelani raztopini preprečujeta.
Secondary keywords:	osmoza;Aquaporin HFFO 2;natrijev metabisulfit;osmotsko sušenje;dolgoročno shranjevanje;diplomske naloge;
Type (COBISS):	Bachelor thesis/paper
Embargo end date (OpenAIRE):	2022-09-15
Thesis comment:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages:	IX, 43 str.
ID:	11962649