how to decrease bod in water treatment

^{10 Tips to Lower Your BOD/TSS}

1. Focus on removing TSS from wastewater first. Reducing TSS will almost always reduce BOD too. ...
2. Get a properly sized EQ tank. Changes in flow and loading rates can cause over or underfeeding of flocculants and coagulants. ...
3. Control the pH of the waste stream. Effective wastewater treatment chemistry has an optimum pH window where it is most efficient. ...
4. Install a modern plate pack DAF made of stainless steel or plastic. A modern plate pack DAF will improve your TSS removal rates. ...
Use a regenerative turbine air dissolution pump. A regenerative turbine aeration pump uses minimal electricity to dissolve air into water and produce 20-30-micron air bubbles.
Get a DAF that cleans itself. Modern high-rate DAFs require takedown and cleaning about every 2 weeks. ...
Use performance-tested liquid chemistry whenever possible. Using liquid chemistry allows for full automation of the process at a low cost, eliminates wetting issues and fish eyes (undissolved clumps of ...
Use a flow proportional dosing and make-down system. Even with a properly sized EQ tank, you should still use a flow proportional dosing system to compensate for flow cycling.
Properly locate chemical injection points and test them. Ideally, you should inject the coagulant first as far upstream as possible. ...
Use the right size DAF equipment. There’s only so much that chemical treatment can do. ...

Full Answer

How does BOD affect wastewater treatment?

To remove BOD, a wastewater treatment plant has to aerate the water, which requires a lot of horsepower, aka electricity. Greater BOD also ends up with greater amounts of sludge to dispose of.

How do you reduce BOD in a sewage treatment plant?

Some of the organic substances need more retention time inside the reactor (3 to 5 days) to degrade completely. As a final polishing step, one can also subject the final treated water y Ozone or hypochlorite treatment to further reduce the BOD values. How can I reduce the MLSS in a sewage treatment plant?

How can we reduce BOD and cod in water?

Water recycling allowing cost and energy savings to be made on the overall water usage as well as water treatment cost. The use of ozone is a very cost efficient and environmentally friendly option for BOD and COD control and reduction. Take care with O3. In the troiposphere is toxic and acarcinogen. AERATION PROCESS. AOP and Coagulation.

What is the use of BOD in water?

BOD is used, often in wastewater-treatment plants, as an index of the degree of organic pollution in water. Looking at water, you might think that it's the most simple thing around.

What reduces BOD in water treatment?

You can reduce COD and BOD by adding hydrogen peroxide to the wastewater solution. The hydrogen peroxide will chemically attack the organics in the wastewater, degrading them and reducing the measured COD and BOD.

Which wastewater treatment is reducing BOD levels the most?

The principal advantage of aerobic sewage treatment is its ability to rapidly and completely digest sewage, reducing BOD to low levels.

What causes BOD to decrease?

Three common BOD reduction methods for wastewater treatment are: Wastewater clarification. Wastewater separation (Coagulation & Flocculation) Anaerobic microbial decomposition.

What decreases when BOD increases?

BOD directly affects the amount of dissolved oxygen in rivers and streams. The greater the BOD, the more rapidly oxygen is depleted in the stream. This means less oxygen is available to higher forms of aquatic life.

Does aeration remove BOD?

Successful BOD removal in an activated sludge process depends on studying and controlling some basics such as wastewater characteristics. Aeration is used to operate activated sludge process units and is perhaps the most frequently used process to remove biochemical oxygen demand (BOD) from wastewater.

Does chlorine reduce BOD?

BOD reduction: Chlorine accomplishes BOD reduction by oxidation of organic compounds present in wastewaters. 4. Oxidation of metal ions: Metal ions which are in reduced state are oxidized by chlorine (e.g., ferrous to ferric ion and manganous to manganic ions).

What causes high BOD levels?

High biochemical oxygen demand can be caused by: high levels of organic pollution, caused usually by poorly treated wastewater; high nitrate levels, which trigger high plant growth.

How can we reduce TDS in wastewater treatment?

Various methods such as physical adsorption, reverse osmosis (RO), distillation, precipitation, membrane filtration, and bacteria-based bioremediation have been developed to reduce/remove TDS from water streams (Pinto et al., 2016). Most of those methods, however, are not cost-effective and/ or environmental friendly.

Why is BOD reduced in secondary sewage treatment?

During the secondary treatment of primary effluents, the BOD level decreases because useful microbes consume a major part of the organic matter. Reduction in the organic matter leads to lowering of BOD.

How is BOD affected by pH?

Bacteria that treat waster water to reduce the COD and BOD, are extremely sensitive to pH! So pH can also have a huge effect on activated sludge COD and BOD reduction rates. Also, some compounds can be precipitated, or dissolved, like heavy metals or suspended solids, at various pH ranges.

Does BOD increase with temperature?

The BOD removal rate in the bioreactor increased when the temperature increased from 20 degrees C to 30 degrees C, 40 degrees C, and 50 degrees C, but it decreased when the temperature increased from 50 degrees C to 60 degrees C. Higher temperature enhanced the endogenous respiration of microbes in the bioreactor.

What affects BOD?

The factors affecting BOD include the type and amount of organic material present, the temperature, the pH, the dissolved oxygen concentration, and the presence of bacteria.

What is the maximum BOD level for wastewater disposal?

Clean Water Act. Typical maximum values range from 10 mg/L for direct environmental disposal and 300 mg/L for disposal to sewer systems .

What is the BOD test?

A BOD test is typically carried out over a standard 5-day incubation period at 20°C (68°F) for the most accurate results.

How does wastewater clarification work?

Wastewater clarification removes organic solids (primary sludge) from the water by utilizing the force of gravity – in other words, the heavier particles settle to the bottom and are removed first. Wastewater clarification is often followed by a chemical separation process.

What is the name of the agglomerating agent that is added to wastewater to make it clumps

In coagulation, a non-toxic agglomerating agent such as Ferric Chloride (F e Cl) or alum is added to the wastewater causing the suspended particles to come together to form clumps which can easily be removed from the water by filtration.

Why do municipalities use a BOD test?

Municipalities can use a BOD test to detect water contamination in their public supply to ensure that it is safe for human consumption. Industries need to know their BOD value to determine when treated wastewater is safe for reuse or disposal.

What is flocculation in water?

Flocculation uses a chemical polymer (flocculating agent) to precipitate organic particles out of the water by coalescing to form larger particles or flocs. These larger particles can then be deposited into a sedimentation tank for further treatment prior to disposal.

What is the effect of dissolved oxygen on marine animals?

Marine animals such as fish use dissolved oxygen for respiration. However, the balance of DO consumption is quite delicate. When a large number of organic compounds are present in water, microbial activity will proliferate, putting a strain on the aquatic ecosystem. Critical DO reduction will ultimately harm marine life.

Most recent answer

i think you if you treat water before sand filtration, it will be efficient.

Similar questions and discussions

What are the method can use to reduces the COD & BOD level of the waste water ?

What is BOD in wastewater?

Industries that discharge wastewater into municipal sanitary sewers or waterways are facing strict regulations on levels of biological or biochemical oxygen demand (BOD). Solid materials in wastewater can consist of organic and/or inorganic materials and organisms.

What is the purpose of a biological oxygen demand test?

Biological Oxygen Demand (BOD) is a chemical procedure for determining the amount of dissolved oxygen needed by aerobic biological organisms “bio-bugs” in a body of water to break down organic material present in a given water sample at a certain temperature over a specific time period. It is not a precise quantitative test, although it is widely used as an indication of the quality of water.

Does ALAR water treatment increase BOD?

ALAR Water Treatment provides these industries with cost effective wastewater equipment solutions in order to help achieve BOD discharge compliance.

Why is BOD important?

BOD is a crucial factor in refining wastewater. The bacteria are important for breaking down substances, however too much BOD can cause unwanted amounts of bacteria. It can also drain receiving waters of oxygen which can kill fish and harm the environment.

Why is it important to remove solids from wastewater?

The importance of removing solids and BOD in wastewater is just as important to a small office park as it is to an entire city. Wastewater treatment utilizes several delicate chemical processes to achieve an acceptable quality of water, which is analogous to an acceptable quality of life. Wastewater contains many elements which break down ...

What is the most effective way to get inorganic solids out of a septic system?

Inorganic material and other TSS (Total Suspended Solids) are most effectively taken out of wastewater through the use of effluent filters .

What are the elements that make up waste water?

Wastewater contains many elements which break down into two groups, organic and inorganic substances.Organic substances include dish soaps, fecal matter, and food particles. These elements break down and feed bacteria which exist in the septic system. Bacteria naturally decomposes organic matter, but requires oxygen to do so.

Does bacteria decompose organic matter?

Bacteria naturally decomposes organic matter, but requires oxygen to do so. The larger and more numerous the organic matter, the more oxygen required to eliminate organic matter. The rate at which wastewater requires oxygen is known as the biological oxygen demand (BOD).

How to reduce COD and BOD?

You can reduce COD and BOD by adding hydrogen peroxide to the wastewater solution. The hydrogen peroxide will chemically attack the organics in the wastewater, degrading them and reducing the measured COD and BOD. Hydrogen peroxide (H2O2) has been used to reduce the BOD and COD of industrial wastewaters for many years.

Why is water recycling important?

Water recycling allowing cost and energy savings to be made on the overall water usage as well as water treatment cost. an already existing water treatment system in order to reduce BOD and COD levels further. The use of ozone is a very cost efficient and environmentally friendly option for BOD and COD control and reduction.

Is ozone good for wastewater treatment?

Ozone is economically viable for Final step of waste water treatment before releasing it back into the environment or reuse ,otherwise economically viability depends on selection of technology and selection of technology depends on effluent conditions . Water treatment with ozone is an effective method to reduce BOD and COD levels in industrial ...

BOD Compliance

High concentrations of BOD in wastewater can lead to regulatory issues. By implementing a system to effectively reduce the BOD in the wastewater stream your company will have the ability to remain in compliance and reduce risk. This will save your company regulatory costs.

COD Compliance

Effluent with high concentrations of COD can lead to compliance issues. Our wastewater systems can significantly reduce the Chemical Oxygen Demand in your wastewater. We have saved our customers surcharges and headaches by reducing their COD wastewater.

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