SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Valdebenito-Rolack,Emky H; Araya,Tamara C; Abarzua,Leslie E; Ruiz-Tagle,Nathaly M; Sossa,Katherine E; Aroca,Germán E; Urrutia,Homero E.

Sulphur Oxidizing Bacteria (SOB) is a group of microorganisms widely used for the biofiltration of Total Reduced Sulphur compounds (TRS). TRS are bad smelling compounds with neurotoxic activity which are produced by different industries (cellulose, petrochemical). Thiobacillus thioparus has the capability to oxidize organic TRS, and strains of this bacterium are commonly used for TRS biofiltration technology. In this study, two thiosulphate oxidizing strains were isolated from a petrochemical plant (ENAP BioBio, Chile). They were subjected to molecular analysis by real time PCR using specific primers for T. thioparus. rDNA16S were sequenced using universal primers and their corresponding thiosulphate activities were compared with the reference strain T....

Tipo: Journal article

Palavras-chave: Biofiltration; Dimethyldisulphide; Dimethylsulphide; Thiobacillus; Thiosulphate.

Ano: 2011

URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000100007

Biological treatment of contaminated air with toluene in an airlift reactor

Vergara-Fernández,Alberto O; Quiroz,Erich F; Aroca,Germán E; Alarcón Pulido,Nelson A.

In this work the variation in the toluene elimination capacity of an airlift bioreactor as a function of the toluene inlet load, using compost as the support material for the microorganisms was studied. In order to evaluate the flexibility of the reactor under changing toluene load, the toluene biodegradation was measured for flows from 2.4 x 10-2 to 0.132 m³ h-1, and a concentration range from 1.4 to 0.8 g m-3. Results show a 100% removal efficiency (RE) for minor flows, however, for a flow increase of 450% the RE decreased 40%, reflecting the equipments weak flexibility in varying flows. Meanwhile the maximum elimination capacity obtained was 230 g m-3 h-1, for toluene loads of 550 g m-3 h-1, corresponding to a flow of 0.132 m³ h-1. It was found that a...

Tipo: Journal article

Palavras-chave: Airlift bioreactors; Biofiltration; Bioscrubbers; Toluene.

Ano: 2008

URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000400003

Comparison on the removal of hydrogen sulfide in biotrickling filters inoculated with Thiobacillus thioparus and Acidithiobacillus thiooxidans

Oxidation of volatile reduced sulphur compounds in biotrickling filter inoculated with Thiobacillus thioparus

Aroca,Germán; Urrutia,Homero; Núñez,Dariela; Oyarzún,Patricio; Arancibia,Alejandra; Guerrero,Karlo.

Emissions of hydrogen sulfide (H2S) by industrial activities is frequent cause of corrosion and unpleasant odours. Treatment of gaseous emissions contaminated with H2S by biotrickling filters inoculated with single cultures of sulfur oxidizer bacteria exhibit several advantages over physicochemical methods, such as shorter adaptation times and higher removal ability. Biofilms of Thiobacillus thioparus and Acidithiobacillus thiooxidans have proved to exhibit high removal capacities, yet no comparative studies between them have been reported. This article reports the efficiency of biotrickling filters inoculated with T. thioparus and A. thiooxidans under similar conditions excepting the pH, that was the optimal for the bacterial growth, for the removal of...

Tipo: Journal article

Palavras-chave: Acidithiobacillus thiooxidans; Biofilm; Biofiltration; Hydrogen sulfide; Thiobacillus thioparus.

Ano: 2007

URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000400005

Modelling of the biofiltration of reduced sulphur compounds through biotrickling filters connected in series: Effect of H2S

Cáceres,Manuel; Morales,Marjorie; San Martín,Ricardo; Urrutia,Homero; Aroca,Germán.

Reduced volatile sulphur compounds generate an impact on the environment, because of the bad smell and its low odour threshold. Compared with the existing physicochemical technologies for their elimination, biotrickling filters are an economically and environmentally sustainable alternative. Usually mixed cultures of microorganisms are used for inoculating biotrickling filters, in this case a pure culture of Thiobacillus thioparus is used for generating a biofilm, allowing to measure its capacity for the oxidation of four volatile reduced sulphur compounds: hydrogen sulphide, dimethyl sulphide, methyl mercaptan and dimethyl disulphide, using a residence time of 0.033 hrs. The viable cells of the biofilm were quantified by epifluorescence microscopy,...

Tipo: Journal article

Palavras-chave: Biofiltration; Odour removal; Volatile sulphur reduced compounds.

Ano: 2010

URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000500011

Influence of Crepidula fornicata on suspended particle dynamics in coastal systems: a mesocosm experimental study

Silva,Javier; Morales,Marjorie; Cáceres,Manuel; Morales,Paulina; Aroca,Germán.

Background: The behaviour of two biotrickling filters connected in serie (BTF) inoculated with Acidithiobacillus thiooxidans and Thiobacillus thioparus, biodegrading hydrogen sulphide (H2S) and dimethyl sulphide (DMS) simultaneously were studied. A model which considers gas to liquid mass transfer and biooxidation in the biofilm attached to the support is developed. Additionally, a fixed bed biotrickling filter where the microorganism is immobilized in a biofilm which degrades a mixture of H2S and DMS is implemented. Validation of the model was carried out using experimental data obtained at different H2S and DMS loads. Results: The inhibitory effect caused by the presence of H2S on the DMS is observed, which is evidenced by the decrease of the DMS removal...

Tipo: Journal article

Palavras-chave: Biofiltration; DMS; Hydrogen sulphide; Mathematical model; Thiobacillus thioparus.

Ano: 2012

URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000300007

ArchiMer

Grasso, Florent; Carlier, Antoine; Cugier, Philippe; Verney, Romaric; Marzloff, Martin.

In coastal environments, strong feedback can exist between benthic fauna and sediment dynamics. Benthic populations can modify sediment dynamics through biofiltration and bioturbation, while hydro- and sediment dynamics directly determine local environmental conditions for benthic organisms. However, these complex feedbacks are difficult to study in situ. Here, we carried out mesocosm experiments to characterize the effects of a benthic species (the gastropod Crepidula fornicata) on mud dynamics under hydrodynamic conditions representative of their natural habitat. Different experimental tests related to the inclusion (or not) of dead or live crepidula reveal that biofiltration can increase particle settling up to 40%. Flocculation, which is strengthened...

Tipo: Text

Palavras-chave: Laboratory experiments; Coastal processes; Physical-biological interactions; Benthic engineer species; Mud settling; Flocculation; Biofiltration; Organic matter.

Ano: 2020

URL: https://archimer.ifremer.fr/doc/00662/77403/79043.pdf

Impact of biocatalyst and moisture content on toluene/xylene mixture biofiltration

Klapková,Eva; Halecký,Martin; Fitch,Mark; Soccol,Carlos Riccardo; Paca,Jan.

The objective of this work was to determine the influence of microbial inoculation on degradation efficiency. Three biofilters were used for the treatment of waste gas. A mixture of compost and perlite (8:2) served as the packing material. One biofilter was inoculated with a constructed microbial population. The second remained uninoculated, having the natural population present in the compost. The third biofilter was uninoculated and the packing material was sterilized. The degradation ability of the uninoculated biofilter started to drop after 18 days, while the removal efficiency of inoculated biofilter was stable. The sterile biofilter proved to have no removal efficiency. Moisture content of the packing and ability of the packing to keep moisture was...

Biofiltration of a styrene/acetone vapor mixture in two reactor types under conditions of styrene overloading

Palavras-chave: Biofiltration; Constructed mixed population; Moisture content; Pollutant mixture.

Ano: 2006

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000700018

Zapotocky,Lubos; Halecky,Martin; Vanek,Tomas; Paca,Jan; Kozliak,Evguenii; Jones,Kim; Soccol,Carlos Ricardo.

This aim of study was to compare the performance of a biofilter (BF) and trickle bed reactor (TBR) under increased styrene loading with a constant acetone load, 2 gc/m3/h. At styrene loading rates up to 30 gc/m3/h, the BF showed higher styrene removal than TBR. However, the BF efficiency started to drop beyond this threshold loading and could never reach steady state, whereas the TBR continued to yield a 50% styrene removal. The acetone removal remained constant (93-98%) in both the reactors at any styrene loading. Once the overloading was lifted, the BF recovered within 26 min, whereas the TBR efficiency bounced back only to 95%, gradually returning to complete removal only in 10 h.

Styrene biofiltration in a trickle-bed reactor

Palavras-chave: Biofiltration; Styrene; Acetone; Vapor mixtures; Two reactors.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000500782

Novak,V.; Paca,J.; Halecky,M.; Soccol,Carlos Ricardo.

The biological treatment of styrene waste gas in a trickle-bed filter (TBF) was investigated. The bioreactor consisted of a two-part glass cylinder (ID 150 mm) filled with 25 mm polypropylene Pall rings serving as packing material. The bed height was 1m. Although the laboratory temperature was maintained at 22 ºC, the water temperature in the trickle-bed filter was slightly lower (about 18 ºC).The main aim of our study was to observe the effect of empty-bed residence time (EBRT) on bioreactor performance at a constant pollutant concentration over an extended time period. The bioreactor was inoculated with a mixed microbial consortium isolated from a styrene-degrading biofilter that had been running for the previous two years. After three weeks of...

Biofiltration of volatile organic compounds of Brazilian gasoline

Palavras-chave: Biofiltration; Styrene; Trickle - bed filter; Loading by air flow rate.

Ano: 2008

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000200019

Rizzolo,Joana Antunez; Santos,Vanessa Cristina de Castro; Soares,Marlene; Woiciechowski,Adenise Lorenci; Soccol,Carlos Ricardo.

Gasoline vapors pollute the atmosphere and can be harmful to human and animal health. Tons of particles of this pollutant are expelled to the atmosphere, generating great economic losses to the industries and serious damage to the environment. Biofiltration is an option of simple technology with low costs that can be used for the gasoline vapor treatment. The present study was carried out in two biofilter systems of laboratorial scale. The biofilter system 1 was operated with a total volume of 2.72 L (four columns) and the biofilter 2 with 2.04 L (three columns) of total volume. Both of them were operated in sequence, with airflow of 450 mL entering each one. Results obtained were as follows for the removal efficiency (RE) of different gasoline vapor...

Impact of biocatalyst and moisture content on toluene/xylene mixture biofiltration

Palavras-chave: Biofiltration; Volatile organic compounds; Gasoline; Atmospheric pollution.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000100017

Klapková,Eva; Halecký,Martin; Fitch,Mark; Soccol,Carlos Ricardo; Paca,Jan.