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CHO  Formaldehyd

Raw material and pollutant at the same time


Formaldehyde is a gaseous, organic compound that also occurs very frequently in nature in low concentrations, e.g. in wood. Formaldehyde is colourless, smells pungent and is very soluble in water.

Formaldehyde is formed during incomplete combustion and other oxidations of carbon-containing material. Formaldehyde is also widely used in the chemical industry.

Formaldehyde hazards


Formaldehyde is extremely toxic. Even at very low concentrations of 0.01 ppm, it can cause irritation of the agents. Its acidic, pungent odour is noticeable from 0.5 ppm, and then irritation of the mouth and nose can also be noticed.

At 30 ppm or more, one’s life is in danger because pulmonary oedema can form.

EU Regulation 1272/2008 (CLP-V), following an amendment of 5 June 2014 (EU 605/2014), stipulates that formaldehyde must be labelled as “Carcinogen 1B” as well as “Mutagen 2”. Formaldehyde is thus considered “probably carcinogenic” and is suspected of altering genetic material.

Where formaldehyde is produced


In food production, formaldehyde is produced in the exhaust air of coffee roasters and smokehouses.

In the chemical industry, formaldehyde is an important raw material and is used in the production of fertilisers, varnishes, paints, binders, adhesives, wood preservatives and many other products.

Formaldehyde is frequently found in wood production, such as MDF, OSB or chipboard, in the manufacture of laminate and in the production of furniture surfaces.

Formaldehyde is also used in textile finishing, e.g. for impregnation, and in paper recycling.

Formaldehyde is also found in cigarette smoke.

Limit values


The TA-Luft currently provides for a formaldehyde limit value of 20 mg/m3.

However, the limit value is to be set significantly lower. The assumption is 5 mg/m3.

The TA-Luft provides for a formaldehyde limit value of 12.5 g/h in the mass flow.

The mass concentration must not exceed a formaldehyde limit of 5 mg/m³.

Our cleaning technology


We neutralise formaldehyde in the exhaust air with a clean and environmentally friendly process that also detects other possible pollutants:

In a multi-stage cleaning section, the exhaust air is first cleaned of a large part of the formaldehyde load with a wet scrubber. A subsequent catalytic purification with UV ozone and a downstream activated carbon filter removes the last pollutants.

The product

CWA

Clean Washer Air
Abluftwäscheranlage, beseitigt wasserlösliche und geruchstragende Partikel, insbesondere Ammonium

The product

CEA

Clean Exhaust Air
UV-Ozon-Abluft­reinigungs­anlage zur Erfüllung der TA Luft

Advantages of the oxytec solution


  • Very effective
  • Much lower energy consumption than thermal processes
  • Very low maintenance
  • Also neutralises almost all other air pollutants

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