Volatile Oranic Compounds UV Treatment

About Saniray

Saniray offers a complete range of advanced UV systems and reactors for treatment of both water and air, for numerous applications including disinfection, micropollutants, water reuse and Advanced Oxidation Process (AOP).

Molecules Graph

The basics of volatile organics

Organic residual compounds is a common by-product of many types of industrial production processes. It is also commonly found in municipal facilities including waste management and wastewater treatment plants.

Volatile organics (VOC) consist of a wide range of molecular substances, which vary greatly in size and complexity. The common denominator among these substances are that, due their volatile nature, they inevitably are transported in the exhaust gases as part of the ventilation systems of said facilities. Benzene, formaldehyde, toluene and methylene chloride are all examples of VOC which must be dealt with in a safe and environmentally friendly manner. In total, over 1,200 million volatile organic compounds have been identified.

VOCs are problematic in many respects since they are formed as part of the core production process in industrial settings. The food and beverage industry, wastewater treatment plants, waste management facilities, process industry and many others all grapple with managing VOC.


UV systems come to the rescue – if done right

The aforementioned enterprises have struggled with VOC emissions for many years, and the problems to find scalable solutions persist, mainly due to the wide ranging types of substances which can be found under any given condition.

The use of UV-C reactors have emerged as a solution to treat VOC emissions. UV-C rays react with chemical bonds within the molecular structure of a particular compound and facilitates its physical fragmentation. The chemical bonds absorb specific energy from specific wavelengths.

However, several challenges are presented if UV-C reactors are to used for treating VOC emissions:

  • Due to the wide range of potential VOC substances, the emitted UV wavelengths and specific absorbance of each substance should be known
  • For complex VOC constituents, the absorption process may only fragment the substance into smaller residues
  • The use of UV may be limited to the VOC concentrations
  • A sufficient reaction time is required, which may be problematic if the flows are large and concentrations are high

If the above challenges can be controlled, UV-C is an excellent avenue for those who look for an effective way of mitigating VOC emissions from their plants.

Aurora B ill
Figure 1: The diagram shows a comparison in operating expenses and CO₂ emissions between three different air treatment techniques.
The vertical axes represent cost measured in USD (teal axis) and weight measured in kg (blue axis).
The comparison is based on an air gas flow of 4000 m³/h.

Saniray Aurora UV-C systems – a Mellifiq solution to VOC

Mellifiq has chosen to embrace the challanges with VOC emissions, and provides a palette of turn-key systems suitable for different conditions and loads.

One of our key offerings to the market is our Saniray Aurora A- and B-series UV-C systems, two powerful product lines which are designed and adaptable to various flows and VOC concentrations. Our systems operate to cover the majority of wavelengths which provide VOC treatment. For heavy loads, our Aurora line works in tandem with Ozonetech RENA Vivo or RENA Tellus high-performance ozone systems to enable additional oxidation power and free radical formation (link to AOP application page under Systems).

The A-series is suitable for small to medium flows, designed for industrial applications with heavy VOC loads, and may be configured with additional adsorption capacity for the most demanding applications. Our B-series is a powerful UV-C systems suitable for convenient connection to ventilation duct for treating the VOC substances in-line or at the exhaust.