Ecological aspects of cleaning and disinfection Part 2: EDTA and NTA organic complexing agents
In this second part, the presence of organic complexing agents in brewery effluent, their degradability as well as possible inhibiting effects are investigated.
EDTA and NTA organic complexing agents are used for cleaning purposes in breweries to prevent precipitation of calcium and magnesium hardness in an alkaline environment. They have a chelating effect on calcium and magnesium ions which are thus withdrawn from the system and cannot react with the precipitating counterions. Typical points of use are specially formulated cleaning agents, additives for lye cleaning and conveyor lubricants.
It is said to attack concrete, can lead to a species shift in water bodies, remobilises heavy metals and contributes to eutrophication of water bodies. 508).
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