Utilização de membranas de osmose inversa descartadas no reúso de efluente final da ETE de uma indústria

Content Provider	Semantic Scholar
Author	Zotti, Juliana Schenhel
Copyright Year	2019
Abstract	The wastewater reuse is an interesting alternative for the optimization of the use of water resources by various sectors of the industry. In this context, it is necessary to study technologies that enable this practice. Reverse Osmosis (RO) is widely used in water desalination plants around the world and may also be employed in the treatment of effluents containing considerable amounts of salts in its composition. The spiral modules of RO membranes have an expected life of 5 to 8 years and are then discharged, generating an environmental passive. An alternative for this residue may be in treatment of effluents for better quality water production, for reuse as cooling water, in agriculture or aquifer recharge. The aim of this work is to evaluate the use of RO membranes discarded of demineralization processes in the treatment of the final effluent from the wastewater treatment station of an industry, in order to comply with the legislation and reuse of this water. The evaluation of membrane efficiency was carried out by testing the effluent in a reverse osmosis bench system, using pretreatment with cartridge filter. The parameters pH, electrical conductivity and turbidity of the raw, filtered and permeate effluent were analysed. It was verified that the pre-treatment chosen was enough to obtain filtered effluent with turbidity less than 1 NTU, a condition required for the feed of RO systems, for the three effluent samples tested. The permeate obtained with the three membrane samples tested was compared in relation to the electrical conductivity specification for the cooling water provided by the industry (400 μS/cm). The permeate obtained with the membrane sample III was found to satisfy the above condition, with an electrical conductivity of approximately 180 μS/cm. The membrane samples used in the tests were characterized before and after their use in the operation with effluent, in order to verify the possible deposit of incrustations or the degradation of the membranes. The analysis of the characterizations indicated that there was degradation of membrane samples I and II. The fouling deposit was observed for the membrane III sample.
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Alternate Webpage(s)	https://www.lume.ufrgs.br/bitstream/handle/10183/200378/001101534.pdf?isAllowed=y&sequence=1
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article