What is activated sludge treatment process?
The activated sludge process is a means of treating both municipal and industrial wastewater. The activated sludge process is a multi-chamber reactor unit that uses highly concentrated microorganisms to degrade organics and remove nutrients from wastewater, producing quality effluent.
What is sludge explain how it is treated?
Sludge is the human waste that is present in the waste water which is left during the sewage treatment. It is used in the production of biogas and manure. This is because it is an organic waste. Treatment: Sludge is collected and decomposed using an anaerobic bacterium.
How do I increase bacteria in my aeration tank?
Increase aeration efficiency by converting from course bubble diffusers to full floor fine bubble aeration diffusers. Add fixed-film media to the aeration tank environment to increase the biomass concentration. Place additional aeration tanks into service to adequately process organic loadings.
Which are the three ingredients in activated sludge systems?
9. Which are the three ingredients in activated sludge systems? Explanation: The cells need oxygen for their metabolism, air is injected from the bottom of the aerator. The water is well agitated by the rising bubbles and creates good contact between the three ingredients: cells, sewage and oxygen.
Why activated sludge is called activated?
They aerated the waste-water continuously for about a month and were able to achieve a complete nitrification of the sample material. Believing that the sludge had been activated (in a similar manner to activated carbon) the process was named activated sludge.
How do you treat sludge?
4-Step Wastewater Sludge Treatment Process
- Step 1 – Sludge Thickening. The first step in the sewage sludge treatment plan is called thickening.
- Step 2 – Sludge Digestion. After amassing all the solids from the sewage sludge begins the sludge digestion process.
- Step 3 – Dewatering.
- Step 4 – Disposal.
Why urea added in aeration tank?
Biological Treatment Urea and DAP will be added in the aeration tank in calculated amount daily for proper bacterial growth. A constant feed rate will be maintained in the aeration tank. A sludge percentage of around 25 to 30 % by volume will be maintained in the aeration tank.
How do I increase sludge in my aeration tank?
You can reach an effect similar to having af MLSS of 12 g/L by converting from activated sludge to suspended biofilm system, MBBR. The biofilm is retained in the aeration tank and thus one can achieve higher biomass density. MLSS can be increased by adding part of cow dung slurry.
What is a good FM ratio?
The optimal range for the F:M ratio in a complete mix system is 0.2 to 0.6 lb BOD/lb MLVSS (kg BOD/kg MLVSS).
Why is chlorine used in sewage treatment?
Chlorine is the most widely used disinfectant for municipal wastewater because it destroys target organisms by oxidizing cellular material.