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Odor Evaluation Articles & Analysis
22 articles found
While odor restrictions are not well defined, it is possible to quantify and characterize odor. The measurement of odor concentration in the ambient air using a relative strength scale in terms of “odor units” is the most widespread method to quantify odors. To further characterize impacts from ...
The factors playing a role in the determination of odor annoyance are: odor concentration and intensity, frequency, appreciation, duration and location. ...
When odor issues occur at an industrial site, rapid diagnosis must be done and a strategy defined to treat odor sources definitively. Today, the sensory panel approach using dynamic olfactometry analysis is considered as first approach to rank odor sources and subsequently to treat the most noxious odors. When investigating the ...
The multiplexing system and software integrated within the DET QMS allow for indentifying and quantifying continuously VOCs and SMVOCs samples from airmoVOC C2-C6 and aimoVOC C6-C12 simultaneously Finally humid and dried samples were produced to check the efficiency of the drying systems and evaluate the impact of humidify on VOCs adsorption, pre-concentration and modification of ...
When odor issues occur at an industrial site, rapid diagnosis must be done and a strategy defined to treat odor sources definitively. Today, the sensory panel approach using dynamic olfactometry analysis is considered as first approach to rank odor sources and subsequently to treat the most noxious odors. When investigating the ...
The black-odor mechanism of Yitong River was analyzed based on survey and monitoring results. We found that organic matter is the main pollution source of Yitong River and its tributaries. A black-odor evaluation model that can describe the pollution of the Yitong River water system was developed, and this model has the parameters I = 0.21 ...
In addition to DBP control, pre-oxidation with CAIROX potassium permanganate was evaluated for manganese, and taste and odor (T&O) problems. CAIROX EVALUATION The evaluation of CAIROX potassium permanganate was conducted in the Spring and Summer of 1999. ...
Problem On days when the bio-solids from the primary settling tank are dewatered, nuisance odors were a common problem. Not only did the plant experience bad odors, but the neighbors living in the general area also complained. ...
The multiplexing system and software integrated within the DET QMS allow for indentifying and quantifying continuously VOCs and SMVOCs samples from airmoVOC C2-C6 and aimoVOC C6-C12 simultaneously Finally humid and dried samples were produced to check the efficiency of the drying systems and evaluate the impact of humidify on VOCs adsorption, pre-concentration and modification of ...
Waterless urinals save precious fresh water normally used for flushing and reduce odour levels in restrooms. However, existing models of waterless urinals available on the market are expensive and maintenance costs of the odour traps of these urinals are also quite high. Experiments conducted using a low cost membrane-based waterless-urinal odour prevention trap available in India revealed a ...
Dosing rates are based on maintaining FOG, odor and corrosion control performance metrics and field evaluation with the Pearl River maintenance staff. In-Pipe utilizes the Environmental Protection Agency (EPA) proposed guidelines to evaluate odor and corrosion potential, which states that hydrogen sulfide concentrations < ...
The principal purpose being to evaluate the microbial technology and benefits of the IPT professional services program for the Savanna WWTP Storm Cells. ...
Technologies for odour control have been widely reviewed and their optimal range of application and performance has been clearly established. Selection criteria, mainly driven by process economics, are usually based on the air flow volume, the inlet concentrations and the required removal efficiency. However, these criteria are shifting with social and environmental issues becoming as ...
Technologies for odour control have been widely reviewed and their optimal range of application and performance has been clearly established. Selection criteria, mainly driven by process economics, are usually based on the air flow volume, the inlet concentrations and the required removal efficiency. However, these criteria are shifting with social and environmental issues becoming as important ...
Government agencies responsible for ensuring healthful water and/or air quality are often faced with resolving public complaints of nuisance odors. Understanding variations in odor intensity may ultimately lead to the establishment and application by such agencies of quantitative limits for effective odorant control. An odor ...
The role of iron addition to sewage sludge prior to anaerobic digestion was evaluated to determine the effect of iron on digestion performance and generation of odor-causing compounds. Hydrogen sulfide (H2S) and volatile organic sulfur compounds (VOSCs) were the odorous gases evaluated in this study. Samples were obtained from ...
Odour impact assessment has become an important environmental issue. Different approaches can be used in order to evaluate the odour impact on receptors, and therefore to regulate it. Among the different possible regulation approaches, the use of dispersion modelling is suggested or required by several national or regional legislations. The wide diffusion of this approach is probably due to the ...
The purpose of this paper to present a case study on how to address the odor problem from secondary sources within a municipal wastewater treatment plant (WWTP) by first identifying the locations of the problem and second by evaluating alternative treatment technologies. ...
The system attributes of high speed, accuracy, and precision provide a cost-effective and complimentary tool for traditional sensory evaluations. Introduction Odor or malodor, which refers to unpleasant smells, is nowadays considered an important contributor to environmentalpollution. ...
New waste water treatment plants, currently under construction or being contracted for building, are under increased scrutiny, for odor generation and their control methods. There are several myths that have been associated with odor generation, transport and control, which includes the following: (1) the generation of odors is inevitable when ...