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Daily Cleaning

Cleaning procedures that are typically conducted every day.

Damp Mopping

Process of using a damp mop lightly wrung in detergent and water to remove lightly soiled surfaces.

Data Logger

Device for storage of data that allows for subsequent analysis.

Dead area/space

An internal section, area or space in equipment where a product, ingredient or other extraneous matter may be trapped or retained and where the flow rate of agents used for cleaning, disinfection or rinsing is reduced or nil, resulting in accumulation of dirt and inefficacy of cleaning, disinfection and rinsing.

Dead Leg

Section of pipe branching of another pipe that is blanked off at the end.

Decontaminate

To remove pathogenic and undesirable microorganisms or soil from surfaces by chemical or physical means.

Deep Clean

Periodic thorough cleaning procedure.

Defloculation

Is the action of breaking up soil aggregates into smaller particles.

Defoamer

A chemical substance which reduces or eliminates foam.

Detergent

A products that assist in the removal of soil from a surface.

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Diafiltration

A design to obtain better purification – water is added to the feed during membrane filtration to wash out the low molecular feed components that will pass through the membranes, often lactose and minerals. Relevance to membrane filtration.

Diaphragm

A thin sheet of material forming a non-porous partition, such as between a pressurized medium and the measuring sensor.

Dilution Rates

The proportion at which products are mixed with water.

DIN

German standard issued by DIN (Deutsches Institut für Normung e.V, German Institute for Standardization)

Disinfectant

A product used after cleaning in order to reduce the population of viable microorganisms remaining on a surface.

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Disinfection

The reduction, by means of chemical agents and/or physical methods, of the number of microorganisms in the environment, to a level that does not compromise food safety or suitability. (Codex)

Dolly Mop – Or socket mop

Traditional round mop usually with cut ends made from cotton yarn for mopping small areas.

Dry-cleaning

Cleaning which does not involve any use of water, a technique which can be used as a preventive measure to reduce risks of microbial development in equipment and in the environment. It also reduces risk of contamination with e.g. residues of aged or modified product. Mostly done manually using brushes and/or vacuum cleaners.

Dust Sweeping

Using a dust control flat mop with handle. 75 – 100mm wide varied lengths up to 80cm, also available in the shape of scissors opening to 2M wide for large floor surfaces.