TITLE:
Identification and Recovery of Volatiles Organic Compounds (VOCs) in the Coffee-Producing Wastewater
AUTHORS:
Alcilucia Oliveira, Lourdes M. C. Cabral, Humberto Bizzo, Neusa P. Arruda, Suely P. Freitas
KEYWORDS:
Wastewater; Volatile Compounds; Pervaporation; Instant Coffee Industry
JOURNAL NAME:
Journal of Water Resource and Protection,
Vol.6 No.4,
March
28,
2014
ABSTRACT: The
objectives of the present study were to recover and identify volatiles organic
compounds (VOCs) in the wastewater (WW) coming from a soluble coffee industrial
plant. For VOCs recover, the WW was concentrated by pervaporation using a
polydimethylsiloxane (PDMS) membrane. Furthermore, the solid phase micro
extraction (SPME) and gas chromatography-mass spectrometry (GC-MS) were used
for VOCs identification. The multivariate method of principal component
analysis (PCA) was performed to evaluate differences amongst the feed and
concentrate streams. Regarding the number of VOCs identified in the wastewater (33) and permeate (72), a significant
statistical difference at p Clusters discriminating were
clearly observed, as the feed and permeate streams are compared. Thus, we
can conclude that pervaporation process using a PDMS membrane was effective to
recover different class of VOCs present in the aqueous effluent and can be
recommended for industrial wastewater treatment.