The amount of oxygen consumed by bacteria and other microorganisms, while decomposing organic matter under aerobic (oxygen present) conditions, at a specific temperature is referred to as biochemical oxygen demand (BOD).
What does BOD in water mean?
The impact of decaying matter on species in a specific ecosystem is determined by the biochemical oxygen demand (BOD) of water. BOD sampling determines how much oxygen bacteria require to break down organic matter.
Importance of BOD Removal
Wastewater treatment is a valuable process and a necessary function for all communities. Water that is released back into the environment must be treated effectively, or it will harm people's health and the surrounding ecosystem.
The removal of solids and BOD in wastewater is as important to a small office park as it is to a city. Bacteria are necessary for the breakdown of substances, but too much BOD can result in an excess of bacteria.
It can also deplete the oxygen levels in receiving waters, killing fish and harming the environment. As a result, controlling the level of BOD at each stage of the treatment process is critical, as is removing as much as possible in the final stages.
How to calculate BOD removal efficiency?
Efficiency = [(IN – Out)/IN] x 100
Example:What percentage of BOD is removed in a plant when the influent BOD is 245 mg/L and the effluent BOD is 22 mg/L?
· Our influent BOD level is 245 mg/liter.
· Our effluent BOD level is 22 mg/liter.
So, the BOD entering the plant is 245 mg per liter, and the BOD leaving is 22 mg per liter. We know,
Efficiency = [(IN – Out)/IN] x 100
When we plug in our numbers and do the math, we see that we take our 245 mg per liter and subtract 22. Then we divide by 245 to get the result. By multiplying that figure by 100, we can see that this wastewater treatment plant removes 91% of the incoming BOD.
Compliance with the BOD
High BOD concentrations in wastewater can cause regulatory issues. By implementing a system to effectively reduce BOD in the wastewater stream, your company will be able to stay in compliance while also reducing risk. This will save your company money on regulatory fees.
BOD removal technologies
Municipal wastewater discharge and industrial processes can produce water with high COD/BOD levels, necessitating careful treatment before discharge to protect waterways.
Secondary treatment methods for BOD removal include aerobic treatment (oxygen rich environment), anaerobic treatment (no oxygen), activated sludge, and membrane bioreactors. Several techniques are used to remove BOD from wastewater before reuse or safe disposal.
The following are the three common BOD reduction methods for wastewater treatment:
1. Clarification of wastewater
2. Separation of wastewater (Coagulation & Flocculation)
3. Microbial decomposition in anaerobic environments
How can we assist?
If you have any questions about wastewater treatment plants or effluent treatment plants, or if you would like to discuss about the BOD removal efficiency in WWTPs, please contact the Netsol Water team right away. Our team is an expert in water treatment and can help you tailor a solution to your specific requirements.
We design, manufacture, supply, erect, and commission Wastewater Treatment Plants (WWTPs) on a turnkey basis, for various types and natures of wastewaters, effluent treatment systems that combine advanced physico-chemical treatment processes with tertiary polishing systems, for the removal of organic, inorganic, oil and grease, heavy metals, and suspended solids.
Netsol Water is Greater Noida-based leading water & wastewater treatment plant manufacturer. We are industry's most demanding company based on client review and work quality. We are known as best commercial RO plant manufacturers, industrial RO plant manufacturer, sewage treatment plant manufacturer, Water Softener Plant Manufacturers and effluent treatment plant manufacturers. Apart from this 24x7 customer support is our USP. Call on +91-9650608473, or write us at enquiry@netsolwater.com for any support, inquiry or product-purchase related query.