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COD or Chemical Oxygen Demand definition. Chemical oxygen demand (COD) is a measure of the capacity of water to consume oxygen during the decomposition of organic matter and the oxidation of inorganic chemicals such as Ammonia and nitrite.
Liquid cryogenic tanks of oxygen are available in different volumes to meet any requirement. Microbulk on-site supply is a modern solution for those who use as few as ten cylinders of oxygen a month. Liquid or gas bulk deliveries and storage systems provide a safe, reliable supply option for high-purity oxygen.