Introduction A common practice in chemical or pharmaceutical plants is to collect VOC (volatile organic compounds) laden air or gas streams and treat them in one central place. for example, in a thermal combustion unit. Thermal combustion units need maintenance or, in the event of sudden breakdown, replacement by an alternative technology. Mobile filters with…
Formaldehyde, IUPAC name methanal, is the simplest aldehyde, with the formula, CH₂O. Its structure is shown in Figure 1. It occurs naturally but is toxic and highly volatile. Figure 1: Structure of formaldehyde Removal of formaldehyde is complex as it can adopt many forms. In its simplest form, formaldehyde is a gas. It is skin-irritating…
The design or selection of the auxiliary equipment of an activated carbon filter depends on a combination of different selection criteria and must be in accordance with the local safety rules. Fan When selecting an industrial fan, we must take into consideration different criteria: Flow rate Can the fan deliver the required flow rate needed…
The design of an activated filter will determine the energy consumption and the activated carbon usage of an adsorption treatment system. Jacobi Services offers a complete range of compact mobile filters of the type EcoFlow™ designed for optimal flow distribution, low pressure loss and for optimum activated carbon consumption. The design or selection of a…
Definitions Odour is the property of a substance that activates the sense of smell and can cause nuisance and health damage. Companies can emit odour (emissions) to the environment that can bother people and lead to complaints and bad publicity. Fugitive emissions contribute to air pollution and climate change as well as an economic cost…
In certain soil remediation projects, there can be a need for purification of exhaust from air strippers, tent ventilation and even the interstitial air in the ground present naturally or under purge from treatment systems. Air Strippers The pump and treat method is a technology often used in soil remediation projects where contaminated groundwater is extracted by…
Introduction Ammonia (NH₃) is a colourless, low molecular weight gas with the chemical formula NH₃ (See figure 1). It has a pungent smell, often associated with strong household cleaners. Ammonia (NH₃) is lighter than air but can be easily condensed to a liquid due to strong hydrogen bonding between the ammonia molecules (hydrogen bonding is…
Introduction Arsine (AsH₃) is an extremely toxic gas that is generated upon exposure of arsenic-containing ores to acids. It is also a by-product of refining of non-ferrous metals. Arsine is used extensively in the manufacture of microchips, solid-state lasers and for the synthesis of organoarsenic compounds. Arsine (AsH₃) is a colourless, flammable, non-irritating toxic gas…
Introduction Phosphine is the compound with the chemical formula PH₃. Phosphine (PH₃) is used as an intermediate in organophosphorus chemistry and as a dopant in the semiconductor industry. Phosphine (PH₃) is alsowidely used as a fumigant (for example, in the tobacco industry) that does not leave residues on the stored product, and for pest control.…
The Problem During commissioning stages, mercury was detected in the air of a newly constructed building. Being set on a former light bulb production site, the link was quickly made between historical mercury contamination of the soil and the previous use of the site. Analyses of soil samples also showed contamination of other heavy metals,…
