Avaliação de um biofiltro piloto para desodorização de compostos orgânicos do setor petroquímico

by de Souza, Marcos Lopes

Abstract (Summary)
Malodorous atmospheric emissions have been the cause of a number of conflicts between their emission sources and the affected population. There are many different sources of odor emissions, and petrochemical companies are an example of such.Petroleum-derived fuels are formed by a large number of volatile organic compounds (VOC), and many of those are odoriferous. The biofiltration, which is a technology of low cost for deodorization, was used to reduce commercial gasoline odors generated from a synthetic source. One biofilter in pilot-scale using turf as material support was monitored during 140 days to a tax of superficial application (TAS) of 62 m3/m2.h and a time of contact (TC) of 52 seconds. The humidity kept in the bed varied between 50 and 60% and the pH average were of 5,4. Weekly samples of raw and treated gas had allowed to evaluate the efficiency of the system through olfactometric and physicalchemical analyses. Through the olfactometry, an olfactometric jury composed between six and ten people had evaluated the following relative parameters to a study of odor impact: concentration, intensity, quality, hedonic character, and annoyance level. The analyses physical-chemical had been carried through by chromatography unit coupled with a mass spectrometer. The physical-chemical analyses were conducted in order to identify the compounds present in the samples collected before and after treatment, and to evaluate the concentration reduction of the odorous compounds through biofiltration.After 140 days of operation, the observed odor concentration reduction was of 87%. The treated gas had weak odor intensity, a pleasant hedonic value and the annoyance level was inexistent. The benzene, toluene, ethyl benzene and xylene concentrations were reduced in 89,98%, 46,43%, 25,0% and 68,60%, respectively. The amount of compounds was reduced significantly of 65 for the sample contends the raw gas for 16 compounds gifts in the treated sample. The biofiltration revealed a promising alternative in the treatment the odoriferous emissions proceeding from the petrochemical sector.
This document abstract is also available in Portuguese.
Bibliographical Information:

Advisor:Henry Xavier Corseuil; Rejane Helena Ribeiro da Costa; Regina de Fátima Peralta Muniz Moreira; Paulo Belli Filho

School:Universidade Federal de Santa Catarina

School Location:Brazil

Source Type:Master's Thesis

Keywords:engenharia ambiental biofiltros avaliação controle de odor compostos orgânicos voláteis cromatografia gás engenharias


Date of Publication:04/11/2007

© 2009 All Rights Reserved.