COD stands for:
Chemical Oxygen Demand (COD) Explained
The question asks for the full form of the acronym COD. Acronyms are often used as abbreviations for technical terms.
Let's look at the provided options:
- Chlorine Oxygen Demand
- Calcium Oxygen Demand
- Clean Oxygen Demand
- Chemical Oxygen Demand
The correct full form for COD in environmental science and water quality testing is Chemical Oxygen Demand.
Chemical Oxygen Demand (COD) is a measure of the total quantity of oxygen required to oxidize all organic and inorganic substances in a water sample. It is widely used to measure the amount of pollution in water bodies, wastewater, and industrial effluents.
Therefore, the acronym COD stands for Chemical Oxygen Demand.
Important Questions from Quality and Characteristics of Sewage
Conventionally, the biochemical oxygen demand (BOD) is measured for _______ days.
Consider the following statements:
1. Ammonia nitrogen is a measure of nitrogen present as ammonium hydroxide and ammonium salts. It will progressively decrease as sewage gets treated.
2. Organic nitrogen is the total nitrogenous matter in sewages excepting that present as ammonia nitrogen, nitrites and nitrates. It becomes ammonia in anaerobic decomposition and nitrites or nitrates in aerobic decomposition.
Which of the above statements is/are correct?Identify the correct relation from the following:
Where BOD, COD, and TOD are Biochemical, Chemical, and Theoretical oxygen demand, respectively.
What is the correct range of \(\frac{{BO{D_u}}}{{COD}}\) for a waste water to be considered as fully biodegradable?
(where BODu = ultimate Bio-chemical oxygen demand and COD = chemical oxygen demand)
Determine ultimate BOD for sewage having 5-day BOD at 20°C as 180 ppm. Assume the de-oxygenation constant as 0.8 per day.
