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4 edition of Effects of biomass growth on pressure drop in biofilters found in the catalog.

Effects of biomass growth on pressure drop in biofilters

Morgan-Sagastume Fernando.

Effects of biomass growth on pressure drop in biofilters

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  • 2 Currently reading

Published by National Library of Canada in Ottawa .
Written in English


Edition Notes

Thesis (M.A.Sc.) -- University of Toronto, 1999.

SeriesCanadian theses = -- Thèses canadiennes
The Physical Object
FormatMicroform
Pagination2 microfiches : negative. --
ID Numbers
Open LibraryOL19766820M
ISBN 100612455912
OCLC/WorldCa51582591

Like coal and nuclear plants, biomass plants may disrupt local water sources. Water use at a biomass plant ranges betw gallons per megawatt-hour. This water is released back into the source at a higher temperature, disrupting the local ecosystem. The nutrient runoff from energy crops can also harm local water resources as. The results obtained with biomass from liquid culture in Fig. Fig.2 2 show V max for the toluene oxygenase of nmol of O 2 /min/mg of biomass (or nmol of O 2 /min/mg of protein) and a K m of mg/liter ( μM). The activity from the biomass grown in the biofilters (STBE) was higher, as shown in Table Table2. 2. Partial Cited by: equilibrium pressure drops were achieved rapidly (within 5‐10 min). Because the column diameter was about one order of magnitude larger than PVA particles, the wall effects on the pressure drop were assumed to be negligible (Di Felice and Gibilaro, ). All pressure drop measurements were conducted in triplicate. @article{osti_, title = {Use of biofilters and suspended-growth reactors to treat VOC's}, author = {Neal, A B and Loehr, R C}, abstractNote = {The greater limits placed on volatile organic compound (VOC) emissions by the Clean Air Act Amendments have stimulated evaluation of various VOC treatment methods. Two applicable gas phase treatment technologies are .


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Effects of biomass growth on pressure drop in biofilters by Morgan-Sagastume Fernando. Download PDF EPUB FB2

EFFECTS OF BIOMASS GROWH ON PRESSURE DROP IN BIOFILTERS Fernando Morgan-Sagastume, Degree of Master of Applied Science, Graduate Department of Chernical Engineering and Applied Chemistry University of Toronto The effects of microbial mass accumulation and distribution in biofilter air pressure losses were experimentally studied.

The effects of biomass accumulation and distribution on air pressure losses in biofilters were experimentally studied. Two bench-scale biofilters, one packed with inert porous pellets (Nova Inert) and the other with wood chips, were operated.

Localized biomass accumulation in the biofilter beds was the key factor increasing the pressure drop, which was caused by local bed clogging due to biomass growth.

The highest pressure drops in the beds (wood chips: 2, Pa/m; Nova Inert: Pa/m) occurred in sections where there were high biomass levels with high water content. biomass accumulation on pressure drop in biofilters that treat volatile organic compounds and to model pressure losses caused by biomass growth in biofilters.

Effects of Biomass Growth on Gas Pressure Drop in Biofilters. Effects of Biomass Growth on Gas Pressure Drop in Biofilters. Journal of Environmental Engineering(5), DOI: /(ASCE)()(). Joanna E Burgess, Simon A Parsons, Richard M Stuetz.

The effects of biomass accumulation and distribution on pressure losses and removal. efficiency of biological load in SABRs were experimentally studied. Localized biomass accumulation in the SABR beds is the key factor increasing the.

pressure drop, which was caused by local bed clogging due to biomass growth. PDF | On Apr 1,Sonia Woudberg and others published Analytical Determination of the Effect of Biofilm Growth on the Pressure Drop over. Relationships between biomass, pressure drop, and performance in a polyurethane biofilter.

In biofilters for controlling volatile organic compounds (VOCs), clogging in the filter bed due to overgrowth of biomass causes the deterioration of biofilter performance. To clarify the effect of biomass concentration (or pressure drop) on biofilter performance, the maximum removal rate for benzene at selected biomass concentration (or pressure drop) was calculated through kinetic analysis in which the inlet benzene concentration was varied from to g m −3 at SV of h −1 (Fig.

3b), as described in Cited by: Pressure drop profile and biomass content The increase in pressure drop is a result of biomass development in the biofilters, which can be explained by the decrease in Cited by: The excess biomass blocked the flow channels in the filter bed and increased the pressure drop.

This result indicated that the excess biomass accumulation contributed most to the bed clogging of BF1. The pressure drop of BF2 was stable during the operation period, because the higher bed void fraction of BF2 reduced the likelihood of the bed by:   In this study, a biofiltration model including the effect of biomass accumulation and inert biomass growth is developed to simultaneously predict the Volatile Organic Compounds (VOCs) removal and filter bed pressure drop under varied inlet by: Morgan-Sagastume F, Sleep BE, Allen DG () Effects of biomass growth on gas pressure drop in biofilters.

J Environ Eng – CrossRef Google Scholar Morgenroth E, Schroeder ED, Chang DPY, Scow KM() Nutrient limitation in. In ideal biofilters, organic pollutants are essentially converted into mineral end products, while biomass is produced at low rates.

Nevertheless, in real cases, excess biofilm develops within the porous medium, and thus causes clogging of fixed-bed bioreactors. This paper presents a characterization of biofilters by: pressure drop from Pa to Pa.

Then the pressure drop rapidly recovered to a high level from 26 to 56 hr. By contrast, the pressure drop decreased from Pa to Figure 1. Pressure drop of the biofilters using various biomass control technologies. M.-F. HAN ET by: 4. Another potential drawback that must be addressed during CH 4 biofiltration is biomass overgrowth, which can compromise the abatement performance and increase the pressure drop in biofilters under.

Biofilters treating high-concentration gaseous volatile organic compounds (VOC) can be subject to bed clogging induced by excess biomass accumulation.

In this study, O3 was continuously injected into biofilters to control biomass. Its effects on the performance of the biofilters and on biomass accumulation were investigated. Four identical biofilters designed Cited by: The hexane removal performance of three compost-based biofilters containing silicone oil at 0% (control), 10% and 20% v/v, and inoculated with a hydrophobic hexane degrading consortium was comparatively assessed under different irrigation by: Fernando Morgan-Sagastume, Brent E.

Sleep and D. Grant Allen, Effects of Biomass Growth on Gas Pressure Drop in Biofilters, Journal of Environmental Engineering,5, (), (). Crossref Mario Zilli, Emilio Palazzi, Luciane Sene, Attilio Converti and Marco Del Borghi, Toluene and styrene removal from air in biofilters, Process.

Biofilters treating high-concentration gaseous volatile organic compounds (VOC) can be subject to bed clogging induced by excess biomass accumulation.

In this study, O 3 was continuously injected into biofilters to control biomass. Its effects on the performance of the biofilters and on biomass accumulation were by:   The biodegradation of toluene was studied in two lab-scale air biofilters operated in parallel, packed respectively with perlite granules (PEG) and polyurethane foam cubes (PUC) and inoculated with the same toluene-degrading fungus.

Differences on the material pore size, from micrometres in PEG to millimetres in PUC, were responsible for distinct biomass growth Cited by:   Effects of biomass growth on gas pressure drop in biofilters.

Journal of Environmental Engineering-Asce - Mudliar S, Giri B, Padoley K, Satpute D, Dixit R, Bhatt P, Pandey R, Juwarkar A, Vaidya A. A statistical analysis of the effect of substrate utilization and shear stress on the kinetics of biofilm detachment Nevenka Adler and Paul Péringer, Biomass growth monitoring using pressure drop in a cocurrent Pratim Biswas, Paul J.

Smith and Richard C. Brenner, Gas treatment in trickle‐bed biofilters: Biomass, how much is enough?. Effect of continuous ozone injection on performance and biomass accumulation of biofilters treating gaseous toluene.

Applied Microbiology and Biotechnology99 (1), DOI: /s Jinying Xi, Prakit Saingam, Feng Gu, Hong-Ying Hu, Xuefei Zhao. Modeling the effects of biomass accumulation on the performance of a biotrickling filter packed with PUF support for the alkaline biotreatment of dimethyl disulfide vapors in air.

Luis Arellano-Garcíaa, Antonio D. Doradob, Xavier Gamisansb, Axayacatl Morales-Guadarramac, d. Biofilters treating high-concentration gaseous volatile organic compounds (VOC) can be subject to bed clogging induced by excess biomass accumulation.

In this study, O3 was continuously injected into biofilters to control biomass. Its effects on the performance of the biofilters and on biomass accumulation were investigated. Four identical biofilters designed. Extruder throughput has a significant effect on the flow rate as reflected in higher flow rate recorded for increased throughput.

The pressure at the die exit is lower than the highest pressure obtained for all the experimental runs. As the dough gets to the die exit, the dough experienced pressure drop. However, decreases in VOC removal capacity and increases in pressure drop because of excess biomass accumulation are serious problems in biofilter applications (Alonso et al.,).

Accumulated excess biomass reduces the void fraction and specific surface area of the filter bed and changes the bed's pore size distribution (Schwarz et al., ).Cited by: 3.

The pressure drop decreased to cm H2O/m after supplying ml/d for 3 weeks. The “high” pressure drop observed when NS supplied decreased could be explained by the fact that the top section was favourable to a strong biomass growth thanks to the uptake of all nutrients.

Due to the consumption of nutrients by the top section. Soil biofilters are relatively large because soil pores are smaller and compounds have low permeability in soil. They also have limited bed depths, required for maintaining humidity in soil and minimizing pressure drop.

Peat/compost biofilters, used commercially, are suitable for treating large volumes of air containingFile Size: KB. High conversion rates come with increased biomass growth in biofilters and high pressure losses are reached sooner with filamentous fungi than with non-filamentous microorganisms, eventually causing clogging and channeling problems in the by: Effect of Oxygen Partial Pressure and COD Loading on the Biofilm Properties in Membrane Aerated Bioreactor, Water Envi.

Res. 81, Zhang, Y., Liss, S.N.& D. Allen, Modeling the Biofiltration of DMS in the Presence of Methanol in Inorganic Biofilters. biomass growth control, because bed clogging and exces-sive gas-phase pressure drop may arise, causing the biofil-ter operation to be halted for maintenance.

Recent studies have precisely focused on the selection of synthetic media carriers that better handle clogging conditions, with poly-urethane (PU) foams been regarded as the ones that bestCited by: 4. However, decreases in VOC removal capacity and increases in pressure drop because of excess biomass accumulation are serious problems in biofilter applications (Alonso et al.,).Cited by: 3.

A lab-scale biofilter packed with mixed packing materials was used for degradation of toluene. Different empty bed residence times,and s, were tested for inlet concentration ranging from to g/m maximum elimination capacity of g/(m 3 h) occurred at an inlet loading rate of g/(m 3 h).

The contribution of the lower layer was higher than other Cited by: 6. After 6 months of operation a long-term biofilter was stopped for two weeks and then it was started up again for a second experimental period of almost years, with high toluene loads and submitted to several physical and chemical treatments in order to remove excess biomass that could affect the reactor’s performance due to clogging, whose main effect is a high pressure by: 8.

The biofiltration process is a promising technology for the treatment of dilute styrene emissions in air (less than 1 gm-3). The efficiency of this process is however strongly dependent upon various operational parameters such as the filter bed characteristics, nutrient supplies, input contaminant concentrations, and gas flow rates (gas residence times).Cited by: The removal of high concentrations of 1-butanol in an air stream was evaluated with a biotrickling filter for potential application to an industrial off-gas.

Experiments were conducted on a laboratory-scale system, packed with perlite, in a co-current downward mode with constant recycling of water. The performance was monitored for different inlet concentrations and empty bed Cited by: Photosynthesis and Biomass Growth Karen S.

Harrell Jennifer Pratt Middle and High School/Biology, Chemistry and Environmental Science Today, corn plants are being used to create a renewable energy source called ethanol.

Ethanol is used in our gas tanks to power our cars and is one of the leading alternatives to natural gas. clusion that excessive accumulation of biomass in the regulatory constraints, researchers have focused on un-reactor has a negative effect on contaminant removal derstanding the fundamental physical, chemical, and efficiency.

To solve this problem, excess biomass is re- microbiological processes that control reactor perfor.Infested Pustules can grow anywhere on viral biomass of sufficient size.

These Pustules can be grown on Blacklight Organic Space Ships to serve as a way for Blacklight to drop Infected or Evolved from orbit onto a celestial body. Helix Tower.

The main method of gaining energy for Blacklight is the growth of what is referred to as a Helix Tower.Question: Question 1 (2 Points) A Group Of Medical Researchers Investigated The Effects Of A Drug Called Pressure Drop X On Lowering Blood Pressure In A Group Of Women Between The Ages Of 60 And 80 Years Old.

The Researchers Did The Following Experiment And Obtained The Indicated Results: One Group Of Women Took A Tablet Containing Pressure Drop X For .