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Cost & Comparison of Various Effluent Treatment Methods

Wat will be the cost of STP capacity 300KLD (FAB)? Which one is better FAB or EAP or MBBR?

 Anoj Singh




Let me tell you about FAB, EAP and MBBR. The similarity is that all are aerobic processes i.e utilising air or rather, oxygen for treatment.

FAB is Fluidised aerobic bed reactor. It consists of a freely suspended media that rotates by air pressure in a reactor. Bacteria grow on the media and consume the organic matter.

This technology is a bit similar to MBBR (Moving bed bio-reactor). The advantage of MBBR over FAB is that FAB reactors require a tall reactor height; not available at many places and is therefore a limiting factor. Besides, the water column below the suspended media is too large and there is scope for bio-mass to escape throught the effluent flow. In tall reactors, sometimes, it is difficlut to have the media moving in a regular pattern.

These are some of the design problems that are addressed in MBBR making it an advanced or next generation version of the FAB system.

Compare this with EAP (Extended aeration process) OR ASP (Activated sludge process). It is the oldest mechanical process that works quite effectively and is known by operators worldwide.

But this process had a few drawbacks. One was the smell around the system. Since the aeration is extended, there is a large voluminous tank undergoing aeration. Next was, of course the large volume tank to be constructed (monetary reason). Naturally,it requires a lot of air to provide oxygen to the volume concerned. Also, bacteria generation time is about 3 to 4 weeks; almost like nurturing a baby. Another reason is the aesthaetics. It is not a very pleasant sight to have a look at dark coffee colored liquid churning.

Clients wanted to have something compact, completely closed, having lower area, lower cost, lower volume and therefore, lower power requirement to drive air in a smaller volume.

The process is also attached growth so treatment starts in a week and stabilises in about 10-12 days. This means lower commissioning time. These advantages gave birth to FAB and some of the inherent problems in FAB were addressed in MBBR. Let's see what the future brings.


Dear Anoj Singh,

FAB Rs. 60 lakhs per MLD
MBR Rs. 275 lakhs per MLD
ASP Rs. 55 lakhs per MLD
UASB+EAS Rs. 50 lakhs per MLD
TF Rs. 50 lakhs per MLD

Hope this suffice your query.

Indian Institute of Technology Delhi
Department of Applied Mechanics
Hauz Khas, New Delhi – 110016

3. Quality of outlet water


Thank you for this information .I wanted to know the comparison of quality of outlet water obtained from each of these technologies and also a very major factor of operating costs, what sort of operating costs can we expect from these technologies.

Waiting for your reply


4. MBBR system

What are the basic design parameters that differ in designing of SAFF and MBBR system? Is a secondary clarifier needed after the bio reactor in MBBR system?

5. Design is the Key

Dear Gansesh & Anoj

MBBR is a very stable process and can give you 5 or 10 BOD at the secondary outlet. A lot of Indian companies have misused the large market and caused a lot of plants to fail. It is very important you use the right kinda of media and the right design. I have put together a 10 point questionaire on how to seletct a good vendor. Feel free to write to me on

6. Questionnaire

Such a questionnaire would be beneficial for all the users.

Kindly share with us at and we can post it to this discussion.


India Water Portal Team

7. Biological vs Chemical System

Biological systems cannot meet the requirement of complicated effluents. All biological systems have been found to be suitable for sewage treatment only.

For pharmaceutical/chemical/petrochemical effluents, go in for physicochemical technology. And we, at Apex ecotech have that technology.

8. How does Fluidized Aerated Bed Reactor (FAB) media work?

Kindly let me know the working of Fluidized Aerated Bed Reactor (FAB) media.

We are installing a STP plant with a capacity of 600 kld. How does the FAB media work and what is its role?

9. Can we use aerobic STP to get cooking gas out of it?

Dear Sir,

Can we use aerobic STP to get cooking gas out of it? If yes, kindly suggest the companies doing it and suggest the price for a 100 KLD plant with this facility.


10. You need to have anaerobic system

Aerobic system does not produce biogas. You need to have anaerobic system. You can have biogas system after aerobic treatment with the sludge and canteen waste.

Mail me if you are interested.


11. Need guidelines regarding selection of right vendor for MBBR

Can someone mail me the guidelines for the selection of right vendor for MBBR technology for sewage treatment?? Which technology is preferable for 650 kld plant when customer is not interested in producing fuel out of it?

12. For a 650KLD STP, MBBR will be the best - Contact us for details

Hi Vikas Kumar Khare

For a 650KLD STP, MBBR will be the best.

188, Centre Point Complex, Jinsi Square,
Bhopal 462008 , Madhya Pradesh
Phone: +91-755-2575643

13. Want a comparision of MBBR vs Electrocoagulation system

I want a comparison of MBBR Vs Electro coagulation system in a Sewage Treatment Plant and which is suitable for STP.

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