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Evaluation of a new packing material for H2S removed by biofiltration

Paper ID Volume ID Publish Year Pages File Format Full-Text
4348 222 2008 8 PDF Available
Title
Evaluation of a new packing material for H2S removed by biofiltration
Abstract

This study aims to evaluate the feasibility of using a new packing material (UP20) in treating H2S. Three identical laboratory-scale biofilters, filled with, respectively, UP20 alone, pine bark, and a configuration made of two layers of pozzolan/UP20 (80/20, v/v), were used for critical comparison. Various concentrations of H2S (up to 100 ppmv) were used to determine the optimum biofilter performances. The superficial velocity of the polluted gas on each biofilter was 65 m h−1 (0.018 m s−1; gas flow rate 0.5 N m3 h−1) corresponding to an empty bed residence time of 57 s. Changes in elimination capacity, removal efficiency, moisture content, temperature and pH were tracked during 95 days. The pressure drops along each biofilter were also measured by varying the gas flow rate from 0.5 to 4 N m3 h−1. After 63 days of operation, the loading rate was significantly increased to 10 g m−3 h−1 and the UP20 biofilter retained a removal efficiency of more than 93%, indicating a strong ability to stimulate microbial activity (compared to 69% for the pine bark biofilter and 74% for the biofilter filled with a configuration of two layers of pozzolan/UP20). A Michaelis–Menten type equation was applied and the maximum removal rate (Vm) and saturation constant (Ks) were calculated. Vm was evaluated at 35 g H2S mbiofilter−3 h−1 for UP20 (14 and 15 g H2S mbiofilter−3 h−1 for pine bark and pozzolan/UP20, respectively). The saturation constant Ks was 70 ppmv for UP20 (18 ppmv for pine bark and 20 ppmv for pozzolan/UP20) indicating that the new packing material will be effective in treating large pollutant concentrations. At low concentrations of pollutant, the results suggest that a biofilter with a configuration of two layers of pozzolan/UP20 is the most suitable choice for treating H2S.

Keywords
Biofiltration; Packing material; Odorous compounds; Biodegradation; Pressure drops; Hydrogen sulphide
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Evaluation of a new packing material for H2S removed by biofiltration
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 42, Issue 2, 1 November 2008, Pages 120–127
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us