Odour Masking Vs Odour Control

It is a common misconception that these two terminologies are identical to each other but in reality, they are poles apart. We at OSIL are here to guide you through the differences.

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Odour Masking

The simplest comparison of industrial Odour Masking is the domestic air-fresheners when introduced into a room at a high concentration they mask the unpleasant pungent odour present in the room or particular area. As a result, the human nose detects the highly concentrated fragrance and not the bad odour. The drawback to this technique is that the odour still exists in the background and when the masking fragrance fades away, the bad odour resumes its presence, thus demonstrating that it is a short-term solution.

Industrial Odour Masking differs only slightly from the above but is not an entirely unique concept. In the industrial sector, odour masking is achieved by releasing a highly concentrated masking agent in numerous kinds of fragrant odours. The process is used on Industrial Waste, Sewage, Farming, and similar industries to mask the odours being generated. Large areas like septic tanks, sewage ponds, refuse tips, offal processing plants, often use masking agents to deodorise the noxious odour, being produced which would otherwise make the surrounding local area very unpleasant.

There are special odour masking products for the industrial sector that are easy-to-use and can be mixed with water in a range of varying dilutions. As a result, these can be applied by mist machines, sprayers or direct drip-feed into the water source.

Odour Control

Numerous facilities such as sewage treatment plants are prone to odour issues due to the residual components from the treated wastewater. These screenings and sludges can produce an excessive amount of hydrogen sulfide gas which smells like rotten eggs. To control this type of odour, various odour control technologies are used:

  1. Micronutrient Dosing- A healthy way to combat this type of odour is by adding micronutrient additives as they biologically breakdown the organic waste and reduce the amount of odour released. These additives increase the growth of facultative bacteria, which prohibits the emission of Hydrogen Sulfide (H2S).
  2. Extraction and Filtration- Extracting the odorous vapours from waste treatment is another method via which the odour in the sewage treatment plants can be controlled. This is an effective method that prevents the odour from infiltrating the surrounding neighbourhoods.  Activated carbon filters and biofilters can be used to treat the extracted vapours.

The above details the differences between these two odour treatment solutions. We at OSIL can ensure that your employees work in an environment with the best possible atmosphere, one that is odourless and safe from noxious gases. We can help create a workplace environment that employees deserve, reach out to our engineering staff for assistance in removing your odour problems.

Case Study: May Gurney

Whitlingham SBT, Odour Abatement System: LavaRok® Biofilter, CuCarbs®, Fans, Ductwork & Covers

Project Description

Odour abatement of H2 S and ammonia extracted from covered tanks through an OSIL LavaRok® Biofilter followed by dual CuCarb® activated carbon polishing units capable of a 99% removal of 30ppm NH3 and 100ppm H2 S from a 12,500mÑ/h air stream. Final effluent water is continually sprayed over the graded LavaRok® pebbles to provide the correct environment for the inoculum.

The porous nature of the LavaRok® provides a large surface area for the inoculum to react with the odorous air. The CuCarb® units polish any odour not removed by the Biofilter. The benefit of CuCarb® over other carbons is the ability to continue the polishing process in a damp environment.

“While OSIL presented three options to help us prevent nuisance odours being produced, together with the relative capital and running costs, their LavaRok® bio-filtration system was clearly the way forward. Bio-filtration fits with our business ethics, from the unique long life media to employing natural biological processes.”

Chris Penn, Project Manager May Gurney.

OSIL Scope

Turnkey design, manufacture, supply, installation and commissioning of OSIL LavaRok® and CuCarb® odour control system including fans, ducting, electrical panels.

Project Duration: 22 weeks

Case Study: Timothy Taylor & Co. Ltd

Keighley Brewery – Odour Control Plant 

Project Description

OSIL were invited to design, supply and install an odour control plant to capture and treat the odours from Timothy Taylor’s new effluent plant. The system was designed to extract 1,550m³/h from the sludge thickening building and comprises a range of interconnecting ducting, an extraction fan and a CuCarb® activated carbon unit with an H2S removal efficiency in excess of 99%. To ensure quiet operation the fan is housed within an acoustic enclosure.

OSIL Scope

Turnkey design, manufacture, supply, installation and commissioning of complete OSIL CuCarb ® odour control system.

Project Duration: 4 weeks

“After analysing our emissions to atmosphere from our new effluent treatment plant we sought a company that could ensure we met exacting standards of odour reduction consistently and cost effectively. OSIL offered us a cost effective practical solution with a high level of industry expertise, design capability and customer service. It continues to work reliably and cost effectively and importantly helps us to meet the high environmental standards set by the company.”

Nick Berkovits, Senior Brewer, Timothy Taylor & Co. Ltd.