Elimination Of Odors Research Articles

Detection of Sulfur Oxidizing Bacteria to Oxidize Hydrogen Sulfide in Biogas from Pig Farm by NGS and DNA Microarray Technique

A high concentration of hydrogen sulfide (H2S) released from pig farming is one of the major environmental problems affecting surrounding communities. In modern pig farms, the bioscrubber is used to eliminate H2S, which is found to be driven mainly by the sulfur-oxidizing bacteria (SOB) community. Therefore, in this study, molecular biology techniques such as next-generation sequencing (NGS) and DNA microarray are proposed to study the linkage between enzyme activity and the abundance of the SOB community. The starting sludge (SFP1) and recirculating sludge (SFP2) samples were collected from the bioscrubber reactor in the pig farm. The abundance of microbial populations between the two sampling sites was considered together with the gene expression results of both soxABXYZ and fccAB. Based on the NGS analysis, the members of phylum Proteobacteria such as Halothiobacillus, Acidithiobacillus, Thiothrix, Novosphingobium, Sulfuricurvum, Sulfurovum, Sulfurimonas, Acinetobacter, Thiobacillus, Magnetospirillum, Arcobacter, and Paracoccus were predominantly found in SFP2. The presence of Cyanobacteria in SFP pig farms is associated with increased biogas yields. The microarray results showed that the expression of soxAXBYZ and fccAB genes involved in the oxidation of sulfide to sulfate was increased in Halothiobacillus, Paracoccus, Acidithiobacillus, Magnetospirillum, Sphingobium, Thiobacillus, Sulfuricurvum, Sulfuricurvum, Arcobacter, and Thiothrix. Both NGS and DNA microarray data supported the functional roles of SOB in odor elimination and the oxidation of H2S through the function of soxABXYZ and fccAB. The results also identified the key microbes for H2S odor treatment, which can be utilized to monitor the stability of biological treatment systems and the toxicity of sulfide minerals by oxidation.

Interaction of composite fume suppression and odor elimination agents with crumb rubber modified asphalt: Inhibition behavior of volatile organic compounds (VOCs) and inorganic fume

The production and construction of crumb rubber modified asphalt (RMA) at high temperatures can produce a large amount of toxic fume, which is detrimental to human health and environment. In this study, a series of composite fume suppression and odor elimination agents (CSEAs) with both physical adsorption and chemical capture functions were adopted to reduce the emissions of volatile organic compounds (VOCs) and hydrogen sulfide (H2S). The material composition, microstructure, and specific surface area of CSEA were analyzed by using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and N2 adsorption-desorption isotherm (BET). The inhibitory effects of adding CSEA on toxic fume emissions from RMA at high temperatures were investigated through a combination of fume emission tests, H2S gas detection, gel permeation chromatography (GPC), and gas chromatography–mass spectrometry technology (GC–MS). The adsorption behavior of CSEA on H2S was analyzed through adsorption dynamics. Results showed that the physical and chemical properties of CSEA are stable while chemical adsorption dominates the CSEA's effect on H2S. ZnO and Ca(OH)2 exhibit good crystallization effects on the surface of the carrier by forming mesoporous structures mostly above 3.4 nm in size. The incorporation of CSEA significantly reduced the total emissions of RMA fume and the main components of VOCs in which the average inhibition rate of H2S can reach 44 % at an initial 30 mins.

Enhancement of Physical Appearance, Skin Permeation, and Odor Reduction Using Liposome of Hydrolyzed Salmon Collagen for Cosmetic Products.

Hydrolyzed collagen (HC) derived from salmon (Oncorhynchus nerka) skin possesses properties that can nourish the skin, and it is one of the active ingredients used in cosmeceutical products for moisturizing the facial skin. However, HC solution gives off a fishy odor and it is gray in color that makes the product unacceptable for cosmetic purposes. This study aimed to use liposome-encapsulated hydrolyzed salmon collagen to improve its physical appearance, skin permeation, and eliminate the fishy odor. Two percent of HC and vitamin B3 (VitB3) were used as active ingredients to incorporate into liposomes. Phosphatidylcholine, cholesterol, and Tween 80 at a suitable weight ratio of 8 : 2 : 1 produced nano-sized vesicles (170.6 ± 0.70 nm) with the highest percentage of entrapment efficiency (95.72 ± 2.00%) of VitB3 and (49.63 ± 1.74%) of HC. Skin permeation and odor detection of the HC-VitB3 liposome were studied using Franz's diffusion cell and gas chromatography, respectively, and compared with HC-VitB3 solution. Subsequently, facial serums were formulated using HC-VitB3 liposomes and HC-VitB3 solutions, and a product satisfaction test was conducted with 100 volunteers to determine their preferred product. The results of the studies of HC-VitB3 liposome serum showed improved formulation appearance, enhanced skin permeation, and better odor elimination compared to the HC-VitB3 serum. Furthermore, seventy-three volunteers in the product satisfaction test preferred and selected the liposomal serum for its superior scent. From all the experimental results, it could be seen that liposomes can help increase skin penetration, and undesirable odors and colors can be masked by the appropriate lipid bilayer structure of liposomes.

Evaluation of the effectiveness of cleaning aligners with a special agent with active ingredients compared to traditional cleaning using water and tablets

The aim of the study was a comparative assessment of the cleaning of aligners using water, tablets for cleaning orthodontic structures and means for cleaning aligners Waterdent Aligner invisible care. The study was conducted in 3 groups of patients undergoing orthodontic treatment with aligners with the study of indicators: hygiene index, ease of use, transparency of the aligner, elimination of odor, staining of the aligner with dyes to detect plaque.
 According to the data obtained before the start of the study, after 2, 4 and 6 weeks, it was found that the hygiene index in patients of all 3 groups had no significant differences and had a slight tendency to improve over 6 weeks of the study; in the group using Waterdent Aligner invisible care, all patients noted a high level of convenience The use rate was higher than in the group using tablets for cleaning orthodontic structures.
 In terms of the transparency of the aligner, the elimination of odor and the presence of plaque, cleaning with the use of Waterdent Aligner invisible care was more effective than cleaning with water or using traditional tablets.

A bibliometric analysis from 1997 to 2023 examining the research trends in eliminating taste and odor compounds from drinking water

The increasing demand for high-quality drinking water has made the elimination of taste and odor (T&O) substances from drinking water a matter of growing importance.

Effects of lavender oil on odor elimination, ostomy adjustment and quality of life in patients with permanent colostomy: A randomized controlled trial

PurposeThe aim of this study is to assess the impact of lavender oil on odor elimination, ostomy adjustment and quality of life outcomes in patients with permanent colostomy. Specifically, the study aims to compare the outcomes of an experimental group receiving lavender oil intervention with those of a control group. MethodsA randomized controlled trial design was employed, including an experimental group receiving lavender oil intervention and a control group receiving standard care. The study participants were patients with permanent colostomy. Various variables were assessed, including odor scale, work and social functioning, sexuality and body image, stoma function, financial concerns, acceptance, anxiety/preoccupation, social engagement and anger. ResultsThe post-scores assessment showed significant differences between the experimental and control groups in all variables. The experimental group exhibited significantly more positive outcomes concerning the reduction of odor (p<0.001), performance in the workplace (p<0.001), body image connected to sexuality (p<0.001), stoma functionality (p<0.001), financial worries (p=0.005), acceptance levels (p<0.001), anxiety levels (p<0.001), social involvement (p<0.001), and irritability (p<0.001). Effect sizes were substantial (=0.88-0.98 in all variables but one), indicating significant differences in average scores before and after the intervention. ConclusionThe findings of this study suggest that lavender oil intervention effectively improved odor elimination, ostomy adjustment and quality of life outcomes in patients with permanent colostomy.

Constructed electron-dense Mn sites in nitrogen-doped Mn3O4 for efficient catalytic ozonation of pyrazines: Degradation and odor elimination

In this study, N-doped Mn3O4 catalysts (Mn-nN) with electron-dense Mn sites were synthesized and employed in heterogeneous catalytic ozonation (HCO). These catalysts demonstrated excellent performance in pyrazines degradation and odor elimination. The synthesis of Mn-nN was achieved through a facile urea-assisted heat treatment method. Experimental characterization and theoretical analyses revealed that the MnN structures in Mn-nN, played a crucial role in facilitating the formation of electron-dense Mn sites that served as the primary active sites for ozone activation. In particular, Mn-1N exhibited excellent performance in the HCO system, demonstrating the highest 2,5-dimethylpyrazine (2,5-DMP) degradation efficiency. •OH was confirmed as the primary reactive oxygen species involved in the HCO process. The second-order rate constants for 2,5-DMP degradation with O3 and •OH, were determined to be (3.75 ± 0.018) × 10−1 and (6.29 ± 0.844) × 109 M−1 s−1, respectively. Seventeen intermediates were identified through GC-MS analysis during the degradation of 2,5-DMP via HCO process with Mn-1N. The degradation pathways were subsequently proposed by considering these identified intermediates. This study introduces a novel approach to synthesize N-doped Mn3O4 catalysts and demonstrates their efficacy in HCO for the degradation of pyrazines and the elimination of associated odors. The results show that the catalysts are promising for addressing odor-related environmental issues and provide valuable insights about the broader significance of catalytic ozonation processes.

Degradation of indole via a two-component indole oxygenase system from Enterococcus hirae GDIAS-5

Animal farming copiously generates indoles, which contribute to odor and pose a challenge for deodorization. While biodegradation is widely accepted, there is a lack of suitable indole-degrading bacteria for animal husbandry. In this study, we aimed to construct genetically engineered strains with indole-degrading abilities. Enterococcus hirae GDIAS-5 is a highly efficient indole-degrading bacterium, which functions via a monooxygenase YcnE presumably contributes to indole oxidation. However, the efficiency of engineered Escherichia coli expressing YcnE for indole degradation is lower than that of GDIAS-5. To improve its efficacy, the underlying indole-degradation mechanisms in GDIAS-5 were analyzed. An ido operon that responds to a two-component indole oxygenase system was identified. In vitro experiments showed that the reductase component of YcnE, YdgI, can improve the catalytic efficiency. The reconstruction of the two-component system in E. coli exhibited higher indole removal efficiency than GDIAS-5. Furthermore, isatin, the key intermediate metabolite in indole degradation, might be degraded via a novel isatin-acetaminophen-aminophenol pathway involving an amidase whose coding gene is located near the ido operon. The two-component anaerobic oxidation system, upstream degradation pathway, and engineering strains investigated in this study provide important insights into indole degradation metabolism and offer efficient resources for achieving bacterial odor elimination.

Pilot scale investigation of DBD-Plasma photocatalysis for industrial application in livestock building air: Elimination of chemical pollutants and odors

Photocatalysis and Plasma are widely considered as efficient and eco-friendly methods for the air treatment at domestic and industrial scales. In fact, the respective application of titanium dioxide (TiO2) and Dielectric-Barrier-Discharge(DBD) drew increasing attention in the last decades for their, flexible, non-selective and high efficiencies for the mineralization and the degradation of large selection of molecules. Nevertheless, the application of these techniques in separate conditions might generate undesired by-products that might hinder their treatment efficiencies. In this study, the effect of combining photocatalysis and Dielectric-Barrier-Discharge (DBD)techniques was investigated for the treatment of livestock building air at laboratory and industrial scale.. of Experiments were conducted in separate (i.e., Photocatalysis or plasma) and combined (i.e., Photocatalysis and plasma) systems to assess the degradation efficiency of two molecules, namely (NH3) and Propionaldehyde (ProPA) under various operating conditions. Studies onducted on laboratory scale showed a interesting level of treatment when applying either photocatalysis or plasma, with degradation yields reaching 29 and 36% for NH3 and 37 and 42% for ProPA, respectively. These degradation efficiencies were further enhanced when combining the processes, thus reaching 72 and 83% for NH3and ProPA, respectively. Moreover, investigations conducted on the generation of ozone during photocatalysis / Plasma treatment showed a decrease in the O3 concentration when compared to separate Plasma treatment. The photocatalytic degradation of ozone under UV radiation and in presence of TiO2 led to Low concentrations of ozone were detected at joint processas a consequence ofits catalytic decomposition under UV-light into HO2°, OH°,O2°-radicals at high humid conditions. The synergetic effect during the pollutant degradation was explained by the association of discharge plasma, presence of O3, UV-light and TiO2..Additionally,The implementation of the photocatalytic-plasma discharge reactor was performed to treat livestock sector air effluent loaded with ammonia.The effect of airflow and relative himidity were assessed. Results showed a significant NH3 removal efficiency in real conditions where it varied between59 and 75% for a flowrate of 2 m2/h and a relative humidity of 100%. Additonnlay, chemical and olfactometric studies were conducted to assess the performance of cimined sytem with real efflluent of livestock building air.

EMERGING TOOL FOR CONTROLLING POLLUTION : A REVIEW ARTICLE

The term "biotechnology" refers to the use of living organisms in man-made systems. Effluent treatment and fermentation both benefit from the employment of microorganisms. The widespread use of these methods could have a significant economic influence in fields including the development of novel pharmaceuticals, foods, and chemicals, the enhancement of agricultural goods, and the degradation of toxic wastes in substantial quantities. When it comes to cleaning the air in factories and cities of unpleasant odors and harmful chemicals, biotechnology provides the most cost-effective and eco-friendly solution. The environment and human health are both negatively impacted by the emission of volatile organic compounds (VOCs) and inorganic odorants. Odor-causing substances in the environment include ammonia, amines, hydrogen sulfide, methyl mercaptan, dimethyl sulfide. The need for air pollution control systems to provide peaceful, breathing air is developing as a result of rising population density and the construction of new residential areas and industrial units. This article offers a survey of the several biotechnological strategies now in use for reducing air pollution and unpleasant odors. Legal restrictions necessitate the elimination of odors and volatile organic compounds (VOCs) due to public complaints about poor air quality on-site and emission monitoring by enforcement agencies. Keywords- volatile organic compound (VOC), biotechnology, air pollution control. Cite this article- Akshita Tiwari, Shweta Sharma, Shweta Sharma, Parul Singh and Nupur Raghav, 2023 “Emerging Tool for Controlling Pollution: A Review Article” Journal of Science Innovations and Nature of Earth, Vol. 3(1), page- 52-58 www.doi.org/10.59436/https://jsiane.com/archives3/12/74

Analysis of Volatile Organic Compounds Emissions and Elimination of Unpleasant Odours During Storage and Accumulation of Bio-Organic Waste from Fish Trout Farms in Karelia

The qualitative composition of emissions generated during the decomposition of waste from trout fish farms in Karelia, determines the ratio of their components, traces the dynamics of changes in the composition of emissions when adding the experimental biological product "Liquidator" was studied. A technique for the identification of highly volatile compounds concentrated on a sorbent is proposed; a sampling method is described using suction tubes with a sorbent in the form of fine-grained glass.

Power‐assisted rotary cutter with negative pressure suction through small incision for axillary osmidrosis

The glandular fluid secreted by apocrine sweat glands is decomposed by parasitic bacteria on the skin surface and releases a bad smell called axillary osmidrosis. To evaluate the effect of power-assisted rotary cutter with negative pressure suction through small incision for axillary osmidrosis. From January 2017 to January 2022, 647 patients with axillary osmidrosis underwent power-assisted rotary cutter with negative pressure suction through small incision surgery to treat for axillary osmidrosis. The operation time (min), intraoperative bleeding (ml) and recovery time (days) were counted. Three months after operation, the amount of underarm sweat, the disappearance of underarm hair, the incidence of operation, the effective rate of operation, and the satisfaction of operation results were evaluated by questionnaire. There were no postoperative complications except five cases of mild axillary pigmentation after 3months. All patients evaluated good odor elimination. No patient was rated as average or poor. No recurrence. Power-assisted rotary cutter with negative pressure suction through small incision is an effective and ideal surgical method to reduce the complications and recurrence of axillary osmidrosis.

Preparation of sludge-based activated carbon for adsorption of dimethyl sulfide and dimethyl disulfide during sludge aerobic composting

Emission of dimethyl sulfide (DMS) and dimethyl disulfide (DMDS) during sludge aerobic composting has limited the use and development of this economical sludge treatment process. In this study, cheap and easily available sludge was used as raw material for the preparation of adsorbents to eliminate DMS and DMDS. A series of sludge-based activated carbons (SACs) were prepared by acid or base activation, and coconut shell mix was also assessed. The results revealed that SAC preparation by KOH activation without coconut shell mix could significantly enhance the surface area and pore volume of SAC, and showed the maximum adsorption capacity for DMS (53.45 mg g−1) and DMDS (151.28 mg g−1). In addition, SAC had a good adsorption effect on a mixture of DMS and DMDS. The SAC adsorbents could efficiently adsorb DMS and DMDS after four cycles of regeneration. Thermodynamic and kinetic analyses demonstrated that adsorption between the SAC and DMS/DMDS was via physical adsorption. The SAC developed in this study utilized waste in a useful way that could significantly reduce the cost of adsorbents and use them for odor elimination during sludge aerobic composting.

Enhanced ammonia adsorption and separation by a molecularly imprinted polymer after acid hydrolysis of its ester crosslinker

While ammonia (NH3) is one of the primary hazardous emissions from sludge aerobic composting plants, it has the potential to be recycled as an energy source or nitrogen fertilizer. Recently, an NH3 molecularly imprinted polymer (NH3-MIP) was developed that efficiently separated NH3 from other compounds, but its adsorption capacity required improvement. This study improved both NH3 adsorption capacity and separation of the NH3-MIP using acid hydrolysis optimization. NH3 adsorption capacity increased 13-fold and remained between 5.59 and 7.84 mmol·g−1 during simulated sludge aerobic composting. Separation factors for NH3/methyl sulfide (DMS) (i.e. NH3 adsorption capacity/DMS adsorption capacity) and NH3/dimethyl disulfide both increased more than 15-fold. Results showed that hydrolysis of the ester crosslinker, ethylene glycol dimethacrylate, on the NH3-MIPs produced chemical adsorption sites (‒COOH and epoxides) and increased hydrogen bonds (‒COOH and alcohol hydroxyl), which promoted NH3 adsorption and separation. It is expected that this will be a beneficial strategy for elimination of odors and NH3 recovery during sludge aerobic composting.

Simultaneous biofiltration of H2S and NH3 using compost mixtures from lignocellulosic waste and chicken manure as packing material.

Biofiltration offers an efficient and economical alternative for the elimination of offensive odors caused by hydrogen sulfide, ammonia, and volatile organic compounds. Considering that packing materials affect the performance and represent the main installation cost, the purpose of this work was to evaluate the biofiltration of H2S and NH3 comparing three composted mixtures made from chicken manure and lignocellulosic residues (pruning waste, sugarcane bagasse, and rice husk) used as packing material. A range of gas concentrations similar to those of a municipal WWTP was used in the biofiltration of a contaminated stream performed on a laboratory scale. The results indicate that at low concentrations of H2S (6-36 ppm) and NH3 (0-1 ppm), the three biofilters showed 100% removal efficiency. Now, at the maximum levels of gas concentrations of H2S (250 ppm) and NH3 (19 ppm) while the removal efficiency of H2S remained higher than 90% in all cases, the removal efficiency of NH3 remained higher than 90% only in the sugarcane bagasse biofilter. Compost mixtures with sugarcane bagasse and rice husk are highly reliable as packing material for biofiltration at high concentration of H2S. Specifically, the sugarcane bagasse mixture had the highest removal efficiency (99% H2S and 95% NH3) and the highest elimination capacity (15 g H2S/m3h and 0.6 g NH3/m3h), making it a better option for the elimination of both gases. These results represent a contribution to the construction of a low-price elimination system of offensive odors in WTTPs and other industries.

Assessment, monitoring, and regulation of odors of any origin in industrial enterprises

Virtually any enterprise in the food and chemical industries, as well as in treatment facilities, has waste with a distinctive unpleasant smell. Elimination of odors is becoming an urgent task for ensuring safety and labor protection at enterprises, as well as public health protection. Olga Malykh, junior research associate at the company "Odor Laboratory N 1", speaks about the experience of smell research at enterprises, the possibilities of olfactometric research, and modern methods and equipment.

Radical treatment of axillary osmidrosis using the VERSAJET™ II Hydrosurgery System or traditional open excision: A prospective cohort study.

Axillary osmidrosis, characterized by an unpleasant odor, renders social life difficult for young adults. This study aimed to compare traditional open excision and use of the VERSAJET™ II Hydrosurgery System for effectiveness and treatment complaints in the treatment of axillary osmidrosis. The current study aimed to assess the curative effect of VERSAJET™ for axillary osmidrosis in a prospective cohort study, comparatively to traditional open excision. In this prospective cohort study, from October 2016 to March 2018, 31 and 34 patients treated with the VERSAJET™ II Hydrosurgery System and traditional open excision, respectively, were recruited and followed up for 6 months post-treatment. Treatment outcomes were assessed, including surgical field size, operation time, postoperative complications, odor elimination, hair growth reduction, scarring, and patient satisfaction. The VERSAJET™ group had significantly shorter operation (P<.001) and lower rates of complications, including hematoma (P=.014), wound dehiscence (P=.048), and epidermal erosion (P=.022) compared with the open excision group. A similar rate of good odor elimination (P=.925) was observed in both groups (96.77% and 97.05% in the VERSAJET™ and open excision groups, respectively). Most patients experienced sparsity of armpit hair following both procedures. Based on a comprehensive consideration of the whole operation process, recovery process, postoperative odor and scar, patients in the VERSAJET™ group were more satisfied compared with those in the open excision group (P=.008). The VERSAJET™ II procedure is shorter, with less postoperative scarring and fewer postoperative complications, compared with the traditional method. Therefore, the VERSAJET™ II procedure is superior to traditional open excision, as a new, radical treatment method for axillary osmidrosis.

Profiling and characterization of odorous volatile compounds from the industrial fermentation of erythromycin

Complaints caused by odors from the fermentation production of pharmaceuticals are common in China. The elimination of odor remains a challenge for the pharmaceutical industry to meet the increasingly strict environment regulations. Erythromycin is a representative antibiotic produced by microbial fermentation. The fermentation exhaust gas of erythromycin fermentation has an unpleasant odor, but the composition of the key odorants has not been identified. The major odorants from the fermentation production of erythromycin API were analyzed by electronic nose, olfactory measurements, gas chromatography-coupled ion mobility spectrometry (GC-IMS) and gas chromatography-mass spectrometry (GC-MS) analysis. Two compounds, 2-methylisoborneol (2-MIB) and geosmin, were identified as the major odorants of erythromycin fermentation. These had not been detected before using only GC-MS analysis of exhaust gas. Aldehydes, including hexanal, octanal, decanal, and benzaldehyde, also contribute to the odor. The composition analysis of odorants using the fermentation broth headspace was more efficient and reliable, considering the significant dilution effect of exhaust gas. The concentration of 2-MIB and geosmin in the fermentation broth greatly exceeded their odor thresholds. The production of major odorants started in the early fermentation stage and became significant in the middle stage (30–70 h). Due to the extremely low odor thresholds of 2-MIB and geosmin, advanced purification may require deodorization of erythromycin fermentation exhaust gas.

Effects of lavender essential oil for colorectal cancer patients with permanent colostomy on elimination of odor, quality of life, and ostomy adjustment: A randomized controlled trial.

To examine the effects of the addition of lavender essential oil to the colostomy bag of the patients with permanent colostomy on the elimination of odor, quality of life, and ostomy adjustment. As a parallel group, single-blinded randomized controlled trial with repeated measures, this study was conducted between November 2016 and February 2018. Patients with a permanent colostomy that had opened at least three months before the study were stratified according to age and sex and were randomized according to days of week. The study sample included 15 patients in the experimental group and 15 in the control group. Patients in the experimental group used lavender essential oil in the ostomy bag, and patients in the control group continued their routine practices about nutrition and stoma care for 1 month. There were no statistically significant differences in demographic characteristics between the experimental and control groups (p > 0.05). As compared with the control group patients, the experimental group patients who used lavender essential oil in the ostomy bag experienced statistically significant less odor, a higher quality of life, and better adjustment to ostomy (all p < 0.05). The use of lavender essential oil in the ostomy bag is a simple, low-cost, easy-to-use, and natural method that is effective for increasing both ostomy adjustment and quality of life levels and for eliminating odor in permanent colostomy patients.

Air inside a dishwasher: Odour characterization and strategy for measuring odour changes

AbstractThe use of home appliances can cause various problems. In the case of dishwashers, the generation of bad odours is one of the most serious problems for users. Odours inside dishwashers are mainly caused by the presence of food residues. A study using gas chromatography‐olfactometry (GC‐O has been carried out to establish how different food residues produce differences in the odours found in dishwashers. A total of 49 compounds were identified in the 109 odour zones detected. Dimethyl trisulfide and methanethiol/dimethyl sulfide were the most significant compounds in most of the situations studied. Some of these compounds were selected to generate an ‘odorous atmosphere’ that was subjected to chemical and sensory analysis. Treatments for the elimination of odours, designed to alter the odours, were applied to this atmosphere before performing chemical (GC‐MS) and sensory analyses. The sensory analysis was carried out to determine the intensity and hedonic tone of the odorous atmosphere. Differences between treatments were found.