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.
Highlights
Brazil is the largest coffee producer and exporter worldwide
Instant coffee is a convenient alternative for daily consumption, a lacks most of the Volatiles Organic Compounds (VOCs) in the water during solutes extraction stage causing an important decrease in the overall coffee flavour
About 34 to 41 VOCs were detected in the permeate (WP) and only 16 in the wastewater (WW)
Summary
How to cite this paper: Oliveira, A., et al (2014) Identification and Recovery of Volatiles Organic Compounds (VOCs) in the Coffee-Producing Wastewater. Instant coffee is a convenient alternative for daily consumption, a lacks most of the VOCs in the water during solutes extraction stage causing an important decrease in the overall coffee flavour. The food and beverage industries are major consumers of water. The instant coffee industry consuming, only in the extraction step, as much as 8 - 12 tonnes of water per tonne of coffee ground in the feed. The challenge of soluble coffee companies is advance in a new technology to simultaneously recovery the VOCs loosed in the effluent and promote an opportunity for wastewater recycling
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