Cosa misura il COD?
Cosa misura il COD?
Il COD, strumento di analisi e pianificazione utile nel processo di decontaminazione delle acque. Importante misura per la filiera di trattamento e i sistemi idrici, il valore del COD indica la quantità di ossigeno necessaria per l'ossidazione di tutte le sostanze organiche presenti nell'acqua, in mg/l o mg/m3.
What is COD test in wastewater treatment?
- Chemical oxygen demand (COD) is used to determine the quantity of pollution in water after wastewater treatment. The higher value of chemical oxygen demand indicates the higher organic pollution in the water sample. Only chemically digest able matter can be determined by the COD test.
What does Cod mean in water quality?
- COD value is usually expressed in milligrams per liter of water (mg/L). High chemical oxygen demand in water indicates greater levels of oxidizable organic matter and consequently, a lower amount of Dissolved Oxygen (DO). Critical DO depletion due to organic contamination can kill off aquatic life forms. What Are the Differences Between COD & BOD?
How to remove cod from wastewater?
- Removal of organic matter from wastewater using coagulants and flocculants eliminates the ‘food’ necessary for microbes to thrive, thus reducing the competition for dissolved oxygen with marine life. Another efficient technique for COD removal is to introduce bacteria or microorganisms that break down organic compounds present in the wastewater.
What is the relationship between cod and BOD in wastewater?
- Extensive observation of the COD and BOD levels on the same wastewater has shown that the COD to BOD ratio of a particular wastewater will remain constant over time. For example, food processing wastewater will generally have a COD:BOD ratio of ~2:1, while textile wastewater that can contain dyes will often have a much higher COD:BOD ratio of ~5:1.
