Table of Contents
What are the advantages of BOD over cod?
BOD detects only the destructible proportion of organic substances and as a general principle is therefore lower than the COD value, which also includes inorganic materials and those materials which cannot be biologically oxidised.
What increases the BOD of water?
Increase in the dissolved oxygen concentration.
What is BOD of clean water?
Clean water has BOD value less than 5 ppm. Polluted water has BOD value higher than 10 ppm.
What is the optimal value for BOD?
Statement II : The optimum value of BOD is 6.5 ppm.
Is low BOD good or bad?
A low biochemical oxygen demand ensures that the dissolved oxygen is not only consumed by organisms from the wastewater. But that there is enough oxygen left for fish and plants.
What is the significance of the BOD value in water bodies?
BOD stands for biological oxygen demand and its high value in the water body is significant to the oraganic wastes in the water source. BOD is the necessary oxygen demand of the microbes to break down the pollutants of the impure water.
What does it mean when the BOD level is high?
This oxygen is then lacking the plants and animals that also live in this water. The water quality is controlled by the authorities to protect users form health and other adverse effects of poor water quality. A high BOD level can indicate the existence of faecal contamination.
What does a high value of BOD (biochemiocompatibility index) indicate?
>> High value of BOD (Biochemi… Biochemical Oxygen Demand or Biological Oxygen Demand is a measurement of the amount of dissolved oxygen (DO) that is used by aerobic microorganisms while decomposing organic matter in water. A high BOD indicates two things: – 1. There is a high level of microorganisms in the water, and 2.
What is the reason for high BOD in wastewater?
The reason for high BOD in wastewater is due to the presence of dissolved organic solids. The wastewater with high organic solids enter in a fresh water body, the microorganisms (primary consumers) present in pure water will try to consume it as its primary food source.