The COD test has the advantage of not being subject to interference from toxic materials, as well as requiring only two or three hours for test completion, as opposed to five days for the BOD test.
What are the advantages of COD and BOD?
Chemical Oxygen Demand (COD) v/s Biological Oxygen Demand (BOD)
| BOD | COD |
|---|---|
| BOD is used to oxidize the natural organic matter and organic waste in the water | COD is capable of degrading the industrial sewage. COD does not measure the amount of oxygen consumed by acetates present in the water sample |
What is the principle of COD test?
The principle behind the COD testing method is that, under acidic conditions, a strong oxidising agent will oxidise almost any organic compound to carbon dioxide. COD analysis will measure the equivalent amount of oxygen that is required to chemically oxidise organic compounds in water.
What are the advantages of COD?
Nutrition. Cod is a low-fat source of protein, making it an excellent choice for people who would like to reduce their fat intake and improve their heart health. Cod also contains a significant amount of iodine, which is an important mineral for thyroid function.
What is the difference between BOD & COD?
Biochemical oxygen demand (BOD) is the amount of oxygen required by the microorganisms to break down the organic materials, whereas chemical oxygen demand (COD) is the amount of oxygen required to break down the organic material via oxidation.
What is the disadvantage of COD?
Open to Loss
The first and foremost disadvantage of Cash on Delivery (CoD) is: it makes the seller vulnerable to losses– whenever a product is returned by the customer, without paying for it.
What are the advantages of BOD?
The main advantages of this method compared to the dilution method are: simplicity: no dilution of sample required, no seeding, no blank sample. direct reading of BOD value. continuous display of BOD value at the current incubation time.
What is the principle of BOD?
BOD is based on the principle that if sufficient oxygen is available, aerobic biological decomposition (i.e., stabilization of organic waste) by microorganisms will continue until all waste is consumed.
Why is COD higher than BOD?
COD is normally higher than BOD because more organic compounds can be chemically oxidised than biologically oxidised. This includes chemicals toxic to biological life, which can make COD tests very useful when testing industrial sewage as they will not be captured by BOD testing.
How do you test for BOD and COD?
Testing for BOD involves incubating a sealed water sample at 20C for five days, followed by measuring the difference in oxygen content before and after incubation. COD measures how much DO is consumed by the oxidation of organic matter and inorganic compounds such as ammonia or nitrite under controlled conditions.
What is the relation between COD and BOD?
The only relation between COD & BOD is – COD > BOD. For most industrial process waste water, community sewage, drains and even some hetrogeneous sources, COD/BOD ratio has been found to be in a defined range and hence, COD result gives more or less BOD value range for such identifiable waste water.
What are the limitations of BOD test?
Limitations Of Test
The method takes five days to perform and uses a discrete sample. The test has poor reproducibility and toxic chemicals can inhibit measurement. Short-term BOD determinations magnify errors and still require relatively long sample periods. The test is not suited for on-line, continuous measurement.
What are the disadvantages of cash on delivery?
One of the challenges with cash on delivery is that it makes the seller vulnerable to losses when the customer returns the product without paying for it. You spend all the money to deliver the product, but ultimately it got replaced. This adds to your revenue loss.
What are the advantages and disadvantages of credit sales?
The advantages and disadvantages of selling to customers on…
- Competitive edge. Offering trade credit will give you a competitive edge over your business rivals.
- Increase in sales.
- Better customer loyalty.
- Funding your debtor book.
- Taking a credit risk with customers.
- Potential for bad debts.
What are advantages and disadvantages of eCommerce?
Comparison Table for Advantages and Disadvantages of E-Commerce
| Advantages | Disadvantages |
|---|---|
| Eliminates the operating cost. | Lack of personal touch. |
| It helps in connecting with people all across the world. | It doesn’t give the luxury of trying before buying the item. |
| Retargets the customers. | Long delivery period. |
What does COD stand for?
abbreviation for. cash on delivery. (in the US) collect on delivery.
What is a major disadvantage of using the BOD test for operational control?
The test has a number of disadvantages: a five-day incubation period, extensive sample preparation and, often, difficulties in obtaining consistent repetitive values. From an operations perspective, time lag is the biggest drawback to BOD (also referred to as Biological Oxygen Demand) analysis.
What is BOD and COD in wastewater?
The biochemical oxygen demand (BOD) represents the amount of dissolved oxygen (DO) consumed by biological organisms when they decompose organic matter in water. The chemical oxygen demand (COD) is the amount of oxygen consumed when the water sample is chemically oxidised.
What is principle 5days BOD test?
Principle BOD is expressed as weight of oxygen consumed per unit volume of water during 5 days at 20°C ; BOD is related to the amount of biodegradable organic matter in water sample ; during oxidative degradation of organic matter, aerobic micro-organisms which perform it, consume oxygen present in water as dissolved
What is the principle of BOD Incubator?
The BOD incubator works on the principle that power is provided by channels MCB, the temperature is stabilized within a digital PID temperature controller, normally at 20 C and the machine is retained functioning for five days. The cooling system begins only after stabilizing the temperature.
What is the importance of BOD test?
The BOD is an important parameter for assessing water quality. It deals with the amount of oxygen consumption (mg O2 L− 1) by aerobic biological organisms to oxidize organic compounds. Sewage with high BOD can cause a decrease in oxygen of receiving waters, which in turn can cause the death of some organism.
Justin Shelton is a professional cook. He’s been in the industry for over 10 years, and he loves nothing more than creating delicious dishes for others to enjoy. Justin has worked in some of the best kitchens in the country, and he’s always looking for new challenges and ways to improve his craft. When he’s not cooking, Justin enjoys spending time with his wife and son. He loves exploring new restaurants and trying out different cuisines.