skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effects of residence time distribution and packing on methanol oxidation in biotrickling filter

Abstract

The effects of residence time distribution (RTD) on biotrickling filter systems and the comparison of the maximum elimination capacity (EC) and poisoning limits as functions of loadings of two packing media, Celite Biocatalyst Carrier R-635 and a subbituminous coal (Hat Creek coal from British Columbia), were studied. To alter the RTD patterns in the two reactor columns, two baffle designs were chosen. The RTD tests were done under dry conditions, over a range of airflow rates, with zero baffle, one baffle, and two baffles added into each column. Mixed culture from compost was used to acclimate the bed for the methanol removal efficiency study. No nutrients were added in the coal column. To study the poisoning limit, the inlet methanol concentration was randomly increased until a severe drop in removal efficiency occurred. From the RTD tests and the removal efficiency runs, which did not result in 100% conversion, number of tank-in-series (N) values, maximum EC values, and rate constants of each column with different baffle configurations could be obtained. Results from duplicate runs showed that addition of baffles decreased the N values of the columns and increased the back mixing in both systems. Maximum EC values, critical loadings, and poisoningmore » limits also increased with increasing back mixing. Coal was superior to Celite Biocatalyst Carrier R-635 because it gave good conversions without additional nutrients. In all runs, the rate of methanol removal was controlled by a zero order process. 14 refs., 10 figs., 7 tabs.« less

Authors:
;  [1]
  1. University of British Columbia, Vancouver, BC (Canada). Chemical and Biological Engineering Department
Publication Date:
OSTI Identifier:
20752101
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of the Air and Waste Management Association; Journal Issue: 56
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; METHANOL; OXIDATION; SUBBITUMINOUS COAL; POISONING; DEACTIVATION; CATALYSTS; MECHANICAL FILTERS; BIOLOGICAL MATERIALS; USES; DECOMPOSITION; REMOVAL; MICROORGANISMS; EFFICIENCY; PACKED BEDS; TIME DEPENDENCE; KINETICS

Citation Formats

Yuanita W. Hutomo, and K.L. Pinder. Effects of residence time distribution and packing on methanol oxidation in biotrickling filter. United States: N. p., 2006. Web. doi:10.1080/10473289.2006.10464458.
Yuanita W. Hutomo, & K.L. Pinder. Effects of residence time distribution and packing on methanol oxidation in biotrickling filter. United States. doi:10.1080/10473289.2006.10464458.
Yuanita W. Hutomo, and K.L. Pinder. Wed . "Effects of residence time distribution and packing on methanol oxidation in biotrickling filter". United States. doi:10.1080/10473289.2006.10464458.
@article{osti_20752101,
title = {Effects of residence time distribution and packing on methanol oxidation in biotrickling filter},
author = {Yuanita W. Hutomo and K.L. Pinder},
abstractNote = {The effects of residence time distribution (RTD) on biotrickling filter systems and the comparison of the maximum elimination capacity (EC) and poisoning limits as functions of loadings of two packing media, Celite Biocatalyst Carrier R-635 and a subbituminous coal (Hat Creek coal from British Columbia), were studied. To alter the RTD patterns in the two reactor columns, two baffle designs were chosen. The RTD tests were done under dry conditions, over a range of airflow rates, with zero baffle, one baffle, and two baffles added into each column. Mixed culture from compost was used to acclimate the bed for the methanol removal efficiency study. No nutrients were added in the coal column. To study the poisoning limit, the inlet methanol concentration was randomly increased until a severe drop in removal efficiency occurred. From the RTD tests and the removal efficiency runs, which did not result in 100% conversion, number of tank-in-series (N) values, maximum EC values, and rate constants of each column with different baffle configurations could be obtained. Results from duplicate runs showed that addition of baffles decreased the N values of the columns and increased the back mixing in both systems. Maximum EC values, critical loadings, and poisoning limits also increased with increasing back mixing. Coal was superior to Celite Biocatalyst Carrier R-635 because it gave good conversions without additional nutrients. In all runs, the rate of methanol removal was controlled by a zero order process. 14 refs., 10 figs., 7 tabs.},
doi = {10.1080/10473289.2006.10464458},
journal = {Journal of the Air and Waste Management Association},
number = 56,
volume = ,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}
  • The biological treatment of volatile organic compounds (VOCs) and air toxics has received increased attention in recent years. Biotreatment of airborne contaminants offers an inexpensive alternative to conventional air treatment technologies such as carbon adsorption and incineration. Most biological air treatment technologies commercially available are fixed-film systems that rely on growth of a biofilm layer on an inert organic support such as compost or peat (biofilters), or an inorganic support such as ceramic or plastic (biotrickling filters). If designed properly, these systems combine the advantages of high biomass concentration with high specific surface area for mass transfer. At economically viablemore » vapor residence times (1 to 1.5 minutes), biofilters can be used for treating vapor streams containing up to approximately 1500 [mu]g/L of readily biodegradable compounds. Biotrickling filters may offer greater performance than biofilters at high contaminant loadings, possibly due to higher internal biomass concentrations. Both systems are best suited for treating vapor streams containing one or two major compounds. If designed properly, biofilters are especially well suited for treating streams that vary in concentration from minute to minute. 11 refs., 8 figs.« less
  • A pilot/full-scale biotrickling filter reactor experiment was performed at an industrial site to treat styrene laden waste gas. The engineered system consisted of two stainless steel tanks in series, each with filter bed volumes of 4.0 m{sup 3}, filled with 3.5-inch plastic spheres. The system treated 340 m{sup 3} h{sup {minus}1} of air laden with styrene concentrations ranging up to 0.8 g m{sup {minus}3}. Over the five-month study, styrene elimination was demonstrated up to 24 g m{sup {minus}3} H{sup {minus}1} with 70 to 85% removal. Operational and performance problems were identified that differ from those developed under controlled, laboratory set-ups.more » Operational problems typically involved equipment malfunctions, with the most prone to failure pieces of equipment being the air sampling system and water level sensors. Performance problems were identified that possibly limited the styrene removal. The transient operation of the plant, producing discontinuous, unsteady-state concentrations, made it difficult to establish a stable biofilm on the packing material. Experiments were performed indicating both biological and mass transfer limitations may have occurred.« less