Some technical terms explained

Standards

Limit value: limit concentration for the sliding annual average that must be respected.
Target value: target for the sliding annual average to achieve these values through improvements.

Sliding annual average: this is the average concentration of the past year (of the last 365 days for particulate matter and of the last 12 months for coarse particulate matter).
Monthly average: this is the average concentration of the last calendar month. For environmental permit standards, it is not the monthly average that counts, but the sliding annual average.
Micrometer or micron: is a unit of measurement abbreviated with the symbol μm. One micrometer or micron is equal to one millionth of a meter (0.000 001 m), or one thousandth of a millimeter.
Nanogram: is a unit of measurement abbreviated with the symbol ng. One nanogram is equal to one billionth of a gram (0.000 000 001 g).
PM10 dust: PM10 dust particles are no larger than 10 microns. 1 micron is 1/1000 of a millimeter. This is so fine that you cannot detect it with the naked eye. By comparison, a single human hair is between 50 and 70 microns thick. Because it is so light, PM10 dust floats for a very long time and can end up in the lungs. The standards and target values for particulate matter or PM10 dust are expressed in ng/m³.
Falling or coarse dust: Coarse dust falls back to the ground fairly quickly and can be stirred up again. This is how it moves in leaps. Once settled at the bottom, it can enter the body through contact with hands or the mouth, for example. Expressed in micrograms per square metre per day (μg/m²/day).

Emissions is the collective name for the emission of dust, metals or gases at the source.

Conducted emissions: dust, metals and gases emitted through a chimney.
Non-conducted emissions: dust, metals and gases that escape from buildings or are blown away when moving raw materials.
Immission: the amount of dust, metals and gases present in the environment. We measure metals in suspended matter in the air and in falling dust, among other things.

Bag filter: purifies the extracted dry gases through a filter and collects all the dust from them.
Electrofilter: removes dust and fine water droplets by blowing the air through a voltage field.
Wet scrubber: removes the pollutants from extracted vapors with a lot of water or gaseous pollutants by spraying and collecting them.

All processes that use heat produce gases. We distinguish them based on their characteristics.

Extraction of primary gases or process gases: Primary gases are created from the production process. They are very hot and contain a lot of dust. That is why we cool them and dispose of them directly via a primary extraction.
Extraction of hygiene gases: This captures gases that escape through openings in the installations, for example when filling the oven. To protect our colleagues, we remove these gases through a secondary extraction.
Tertiary extraction: Captures all remaining gases by sealing the yellow building and purifying all the air from it.